Proteins obtained from ESCHERICHIA COLI.
A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.
Infections with bacteria of the species ESCHERICHIA COLI.
Thin, filamentous protein structures, including proteinaceous capsular antigens (fimbrial antigens), that mediate adhesion of E. coli to surfaces and play a role in pathogenesis. They have a high affinity for various epithelial cells.
Cell-surface components or appendages of bacteria that facilitate adhesion (BACTERIAL ADHESION) to other cells or to inanimate surfaces. Most fimbriae (FIMBRIAE, BACTERIAL) of gram-negative bacteria function as adhesins, but in many cases it is a minor subunit protein at the tip of the fimbriae that is the actual adhesin. In gram-positive bacteria, a protein or polysaccharide surface layer serves as the specific adhesin. What is sometimes called polymeric adhesin (BIOFILMS) is distinct from protein adhesin.
A verocytotoxin-producing serogroup belonging to the O subfamily of Escherichia coli which has been shown to cause severe food-borne disease. A strain from this serogroup, serotype H7, which produces SHIGA TOXINS, has been linked to human disease outbreaks resulting from contamination of foods by E. coli O157 from bovine origin.
Proteins found in any species of bacterium.
The functional hereditary units of BACTERIA.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Deoxyribonucleic acid that makes up the genetic material of bacteria.
The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.
Extrachromosomal, usually CIRCULAR DNA molecules that are self-replicating and transferable from one organism to another. They are found in a variety of bacterial, archaeal, fungal, algal, and plant species. They are used in GENETIC ENGINEERING as CLONING VECTORS.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
A species of gram-negative, rod-shaped bacteria belonging to the K serogroup of ESCHERICHIA COLI. It lives as a harmless inhabitant of the human LARGE INTESTINE and is widely used in medical and GENETIC RESEARCH.
The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells.
Physicochemical property of fimbriated (FIMBRIAE, BACTERIAL) and non-fimbriated bacteria of attaching to cells, tissue, and nonbiological surfaces. It is a factor in bacterial colonization and pathogenicity.
Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.
Any of the processes by which cytoplasmic or intercellular factors influence the differential control of gene action in bacteria.
In bacteria, a group of metabolically related genes, with a common promoter, whose transcription into a single polycistronic MESSENGER RNA is under the control of an OPERATOR REGION.
Thin, hairlike appendages, 1 to 20 microns in length and often occurring in large numbers, present on the cells of gram-negative bacteria, particularly Enterobacteriaceae and Neisseria. Unlike flagella, they do not possess motility, but being protein (pilin) in nature, they possess antigenic and hemagglutinating properties. They are of medical importance because some fimbriae mediate the attachment of bacteria to cells via adhesins (ADHESINS, BACTERIAL). Bacterial fimbriae refer to common pili, to be distinguished from the preferred use of "pili", which is confined to sex pili (PILI, SEX).
Proteins isolated from the outer membrane of Gram-negative bacteria.
The rate dynamics in chemical or physical systems.
Ribonucleic acid in bacteria having regulatory and catalytic roles as well as involvement in protein synthesis.
Proteins prepared by recombinant DNA technology.
Structures within the nucleus of bacterial cells consisting of or containing DNA, which carry genetic information essential to the cell.
Viruses whose host is Escherichia coli.
A test used to determine whether or not complementation (compensation in the form of dominance) will occur in a cell with a given mutant phenotype when another mutant genome, encoding the same mutant phenotype, is introduced into that cell.
Proteins that are structural components of bacterial fimbriae (FIMBRIAE, BACTERIAL) or sex pili (PILI, SEX).
Strains of ESCHERICHIA COLI that produce or contain at least one member of either heat-labile or heat-stable ENTEROTOXINS. The organisms colonize the mucosal surface of the small intestine and elaborate their enterotoxins causing DIARRHEA. They are mainly associated with tropical and developing countries and affect susceptible travelers to those places.
The degree of similarity between sequences of amino acids. This information is useful for the analyzing genetic relatedness of proteins and species.
Strains of ESCHERICHIA COLI characterized by attaching-and-effacing histopathology. These strains of bacteria intimately adhere to the epithelial cell membrane and show effacement of microvilli. In developed countries they are associated with INFANTILE DIARRHEA and infantile GASTROENTERITIS and, in contrast to ETEC strains, do not produce ENDOTOXINS.
A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms.
Use of restriction endonucleases to analyze and generate a physical map of genomes, genes, or other segments of DNA.
Strains of ESCHERICHIA COLI with the ability to produce at least one or more of at least two antigenically distinct, usually bacteriophage-mediated cytotoxins: SHIGA TOXIN 1 and SHIGA TOXIN 2. These bacteria can cause severe disease in humans including bloody DIARRHEA and HEMOLYTIC UREMIC SYNDROME.
The parts of a macromolecule that directly participate in its specific combination with another molecule.
Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.
Toxic substances formed in or elaborated by bacteria; they are usually proteins with high molecular weight and antigenicity; some are used as antibiotics and some to skin test for the presence of or susceptibility to certain diseases.
Substances that reduce the growth or reproduction of BACTERIA.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
A parasexual process in BACTERIA; ALGAE; FUNGI; and ciliate EUKARYOTA for achieving exchange of chromosome material during fusion of two cells. In bacteria, this is a uni-directional transfer of genetic material; in protozoa it is a bi-directional exchange. In algae and fungi, it is a form of sexual reproduction, with the union of male and female gametes.
Strains of ESCHERICHIA COLI that are a subgroup of SHIGA-TOXIGENIC ESCHERICHIA COLI. They cause non-bloody and bloody DIARRHEA; HEMOLYTIC UREMIC SYNDROME; and hemorrhagic COLITIS. An important member of this subgroup is ESCHERICHIA COLI O157-H7.
Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.
A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.
Strains of Escherichia coli that preferentially grow and persist within the urinary tract. They exhibit certain virulence factors and strategies that cause urinary tract infections.
The degree of pathogenicity within a group or species of microorganisms or viruses as indicated by case fatality rates and/or the ability of the organism to invade the tissues of the host. The pathogenic capacity of an organism is determined by its VIRULENCE FACTORS.
The biosynthesis of RNA carried out on a template of DNA. The biosynthesis of DNA from an RNA template is called REVERSE TRANSCRIPTION.
Those components of an organism that determine its capacity to cause disease but are not required for its viability per se. Two classes have been characterized: TOXINS, BIOLOGICAL and surface adhesion molecules that effect the ability of the microorganism to invade and colonize a host. (From Davis et al., Microbiology, 4th ed. p486)
A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria whose organisms occur in the lower part of the intestine of warm-blooded animals. The species are either nonpathogenic or opportunistic pathogens.
An increased liquidity or decreased consistency of FECES, such as running stool. Fecal consistency is related to the ratio of water-holding capacity of insoluble solids to total water, rather than the amount of water present. Diarrhea is not hyperdefecation or increased fecal weight.
The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.
Inflammatory responses of the epithelium of the URINARY TRACT to microbial invasions. They are often bacterial infections with associated BACTERIURIA and PYURIA.
The sum of the weight of all the atoms in a molecule.
Recombinant proteins produced by the GENETIC TRANSLATION of fused genes formed by the combination of NUCLEIC ACID REGULATORY SEQUENCES of one or more genes with the protein coding sequences of one or more genes.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).
A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.
Excrement from the INTESTINES, containing unabsorbed solids, waste products, secretions, and BACTERIA of the DIGESTIVE SYSTEM.
The ability of microorganisms, especially bacteria, to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).
Transport proteins that carry specific substances in the blood or across cell membranes.
Substances that are toxic to the intestinal tract causing vomiting, diarrhea, etc.; most common enterotoxins are produced by bacteria.
Genetically engineered MUTAGENESIS at a specific site in the DNA molecule that introduces a base substitution, or an insertion or deletion.
A group of enzymes that catalyzes the hydrolysis of terminal, non-reducing beta-D-galactose residues in beta-galactosides. Deficiency of beta-Galactosidase A1 may cause GANGLIOSIDOSIS, GM1.
Any method used for determining the location of and relative distances between genes on a chromosome.
Vaccines or candidate vaccines used to prevent or treat both enterotoxigenic and enteropathogenic Escherichia coli infections.
The arrangement of two or more amino acid or base sequences from an organism or organisms in such a way as to align areas of the sequences sharing common properties. The degree of relatedness or homology between the sequences is predicted computationally or statistically based on weights assigned to the elements aligned between the sequences. This in turn can serve as a potential indicator of the genetic relatedness between the organisms.
Membrane proteins whose primary function is to facilitate the transport of molecules across a biological membrane. Included in this broad category are proteins involved in active transport (BIOLOGICAL TRANSPORT, ACTIVE), facilitated transport and ION CHANNELS.
A temperate inducible phage and type species of the genus lambda-like viruses, in the family SIPHOVIRIDAE. Its natural host is E. coli K12. Its VIRION contains linear double-stranded DNA with single-stranded 12-base 5' sticky ends. The DNA circularizes on infection.
An antibiotic first isolated from cultures of Streptomyces venequelae in 1947 but now produced synthetically. It has a relatively simple structure and was the first broad-spectrum antibiotic to be discovered. It acts by interfering with bacterial protein synthesis and is mainly bacteriostatic. (From Martindale, The Extra Pharmacopoeia, 29th ed, p106)
Proteins which are found in membranes including cellular and intracellular membranes. They consist of two types, peripheral and integral proteins. They include most membrane-associated enzymes, antigenic proteins, transport proteins, and drug, hormone, and lectin receptors.
The aggregation of ERYTHROCYTES by AGGLUTININS, including antibodies, lectins, and viral proteins (HEMAGGLUTINATION, VIRAL).
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
Enzymes that catalyze DNA template-directed extension of the 3'-end of an RNA strand one nucleotide at a time. They can initiate a chain de novo. In eukaryotes, three forms of the enzyme have been distinguished on the basis of sensitivity to alpha-amanitin, and the type of RNA synthesized. (From Enzyme Nomenclature, 1992).
The transfer of bacterial DNA by phages from an infected bacterium to another bacterium. This also refers to the transfer of genes into eukaryotic cells by viruses. This naturally occurring process is routinely employed as a GENE TRANSFER TECHNIQUE.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Discrete segments of DNA which can excise and reintegrate to another site in the genome. Most are inactive, i.e., have not been found to exist outside the integrated state. DNA transposable elements include bacterial IS (insertion sequence) elements, Tn elements, the maize controlling elements Ac and Ds, Drosophila P, gypsy, and pogo elements, the human Tigger elements and the Tc and mariner elements which are found throughout the animal kingdom.
In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships.
Process of generating a genetic MUTATION. It may occur spontaneously or be induced by MUTAGENS.
Bacteriocins elaborated by strains of Escherichia coli and related species. They are proteins or protein-lipopolysaccharide complexes lethal to other strains of the same species.
Enzymes that are part of the restriction-modification systems. They catalyze the endonucleolytic cleavage of DNA sequences which lack the species-specific methylation pattern in the host cell's DNA. Cleavage yields random or specific double-stranded fragments with terminal 5'-phosphates. The function of restriction enzymes is to destroy any foreign DNA that invades the host cell. Most have been studied in bacterial systems, but a few have been found in eukaryotic organisms. They are also used as tools for the systematic dissection and mapping of chromosomes, in the determination of base sequences of DNAs, and have made it possible to splice and recombine genes from one organism into the genome of another. EC 3.21.1.
A subdiscipline of genetics which deals with the genetic mechanisms and processes of microorganisms.
The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells.
Substances elaborated by bacteria that have antigenic activity.
A toxin produced by certain pathogenic strains of ESCHERICHIA COLI such as ESCHERICHIA COLI O157. It is closely related to SHIGA TOXIN produced by SHIGELLA DYSENTERIAE.
A family of galactoside hydrolases that hydrolyze compounds with an O-galactosyl linkage. EC 3.2.1.-.
Short sequences (generally about 10 base pairs) of DNA that are complementary to sequences of messenger RNA and allow reverse transcriptases to start copying the adjacent sequences of mRNA. Primers are used extensively in genetic and molecular biology techniques.
The genetic unit consisting of three structural genes, an operator and a regulatory gene. The regulatory gene controls the synthesis of the three structural genes: BETA-GALACTOSIDASE and beta-galactoside permease (involved with the metabolism of lactose), and beta-thiogalactoside acetyltransferase.
A group of enzymes which catalyze the hydrolysis of ATP. The hydrolysis reaction is usually coupled with another function such as transporting Ca(2+) across a membrane. These enzymes may be dependent on Ca(2+), Mg(2+), anions, H+, or DNA.
Agents that cause agglutination of red blood cells. They include antibodies, blood group antigens, lectins, autoimmune factors, bacterial, viral, or parasitic blood agglutinins, etc.
The level of protein structure in which combinations of secondary protein structures (alpha helices, beta sheets, loop regions, and motifs) pack together to form folded shapes called domains. Disulfide bridges between cysteines in two different parts of the polypeptide chain along with other interactions between the chains play a role in the formation and stabilization of tertiary structure. Small proteins usually consist of only one domain but larger proteins may contain a number of domains connected by segments of polypeptide chain which lack regular secondary structure.
An error-prone mechanism or set of functions for repairing damaged microbial DNA. SOS functions (a concept reputedly derived from the SOS of the international distress signal) are involved in DNA repair and mutagenesis, in cell division inhibition, in recovery of normal physiological conditions after DNA repair, and possibly in cell death when DNA damage is extensive.
DNA sequences which are recognized (directly or indirectly) and bound by a DNA-dependent RNA polymerase during the initiation of transcription. Highly conserved sequences within the promoter include the Pribnow box in bacteria and the TATA BOX in eukaryotes.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
The heritable modification of the properties of a competent bacterium by naked DNA from another source. The uptake of naked DNA is a naturally occuring phenomenon in some bacteria. It is often used as a GENE TRANSFER TECHNIQUE.
Production of new arrangements of DNA by various mechanisms such as assortment and segregation, CROSSING OVER; GENE CONVERSION; GENETIC TRANSFORMATION; GENETIC CONJUGATION; GENETIC TRANSDUCTION; or mixed infection of viruses.
Inflammation of the KIDNEY involving the renal parenchyma (the NEPHRONS); KIDNEY PELVIS; and KIDNEY CALICES. It is characterized by ABDOMINAL PAIN; FEVER; NAUSEA; VOMITING; and occasionally DIARRHEA.
The spatial arrangement of the atoms of a nucleic acid or polynucleotide that results in its characteristic 3-dimensional shape.
A serotype of Salmonella enterica that is a frequent agent of Salmonella gastroenteritis in humans. It also causes PARATYPHOID FEVER.
Genes which regulate or circumscribe the activity of other genes; specifically, genes which code for PROTEINS or RNAs which have GENE EXPRESSION REGULATION functions.
Multicomponent ribonucleoprotein structures found in the CYTOPLASM of all cells, and in MITOCHONDRIA, and PLASTIDS. They function in PROTEIN BIOSYNTHESIS via GENETIC TRANSLATION.
Enzymes found in many bacteria which catalyze the hydrolysis of the amide bond in the beta-lactam ring. Well known antibiotics destroyed by these enzymes are penicillins and cephalosporins.
The sequential correspondence of nucleotides in one nucleic acid molecule with those of another nucleic acid molecule. Sequence homology is an indication of the genetic relatedness of different organisms and gene function.
Mutagenesis where the mutation is caused by the introduction of foreign DNA sequences into a gene or extragenic sequence. This may occur spontaneously in vivo or be experimentally induced in vivo or in vitro. Proviral DNA insertions into or adjacent to a cellular proto-oncogene can interrupt GENETIC TRANSLATION of the coding sequences or interfere with recognition of regulatory elements and cause unregulated expression of the proto-oncogene resulting in tumor formation.
The phenomenon by which a temperate phage incorporates itself into the DNA of a bacterial host, establishing a kind of symbiotic relation between PROPHAGE and bacterium which results in the perpetuation of the prophage in all the descendants of the bacterium. Upon induction (VIRUS ACTIVATION) by various agents, such as ultraviolet radiation, the phage is released, which then becomes virulent and lyses the bacterium.
Periplasmic proteins that scavenge or sense diverse nutrients. In the bacterial environment they usually couple to transporters or chemotaxis receptors on the inner bacterial membrane.
A family of recombinases initially identified in BACTERIA. They catalyze the ATP-driven exchange of DNA strands in GENETIC RECOMBINATION. The product of the reaction consists of a duplex and a displaced single-stranded loop, which has the shape of the letter D and is therefore called a D-loop structure.
The complete absence, or (loosely) the paucity, of gaseous or dissolved elemental oxygen in a given place or environment. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The genetic complement of a BACTERIA as represented in its DNA.
Mutation process that restores the wild-type PHENOTYPE in an organism possessing a mutationally altered GENOTYPE. The second "suppressor" mutation may be on a different gene, on the same gene but located at a distance from the site of the primary mutation, or in extrachromosomal genes (EXTRACHROMOSOMAL INHERITANCE).
The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups.
A toxin produced by certain pathogenic strains of ESCHERICHIA COLI such as ESCHERICHIA COLI O157. It shares 50-60% homology with SHIGA TOXIN and SHIGA TOXIN 1.
The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.
A genetic rearrangement through loss of segments of DNA or RNA, bringing sequences which are normally separated into close proximity. This deletion may be detected using cytogenetic techniques and can also be inferred from the phenotype, indicating a deletion at one specific locus.
Periplasmic proteins that bind MALTOSE and maltodextrin. They take part in the maltose transport system of BACTERIA.
A family of gram-negative, facultatively anaerobic, rod-shaped bacteria that do not form endospores. Its organisms are distributed worldwide with some being saprophytes and others being plant and animal parasites. Many species are of considerable economic importance due to their pathogenic effects on agriculture and livestock.
Biologically active DNA which has been formed by the in vitro joining of segments of DNA from different sources. It includes the recombination joint or edge of a heteroduplex region where two recombining DNA molecules are connected.
A form of gram-negative meningitis that tends to occur in neonates, in association with anatomical abnormalities (which feature communication between the meninges and cutaneous structures) or as OPPORTUNISTIC INFECTIONS in association with IMMUNOLOGIC DEFICIENCY SYNDROMES. In premature neonates the clinical presentation may be limited to ANOREXIA; VOMITING; lethargy; or respiratory distress. Full-term infants may have as additional features FEVER; SEIZURES; and bulging of the anterior fontanelle. (From Menkes, Textbook of Child Neurology, 5th ed, pp398-400)
The phenotypic manifestation of a gene or genes by the processes of GENETIC TRANSCRIPTION and GENETIC TRANSLATION.
The small RNA molecules, 73-80 nucleotides long, that function during translation (TRANSLATION, GENETIC) to align AMINO ACIDS at the RIBOSOMES in a sequence determined by the mRNA (RNA, MESSENGER). There are about 30 different transfer RNAs. Each recognizes a specific CODON set on the mRNA through its own ANTICODON and as aminoacyl tRNAs (RNA, TRANSFER, AMINO ACYL), each carries a specific amino acid to the ribosome to add to the elongating peptide chains.
Process of determining and distinguishing species of bacteria or viruses based on antigens they share.
A disaccharide of GLUCOSE and GALACTOSE in human and cow milk. It is used in pharmacy for tablets, in medicine as a nutrient, and in industry.
A protein which is a subunit of RNA polymerase. It effects initiation of specific RNA chains from DNA.
Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.
Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.
Proteins found in ribosomes. They are believed to have a catalytic function in reconstituting biologically active ribosomal subunits.
Any tests that demonstrate the relative efficacy of different chemotherapeutic agents against specific microorganisms (i.e., bacteria, fungi, viruses).
Life or metabolic reactions occurring in an environment containing oxygen.
The process by which a DNA molecule is duplicated.
A class of toxins that inhibit protein synthesis by blocking the interaction of ribosomal RNA; (RNA, RIBOSOMAL) with PEPTIDE ELONGATION FACTORS. They include SHIGA TOXIN which is produced by SHIGELLA DYSENTERIAE and a variety of shiga-like toxins that are produced by pathologic strains of ESCHERICHIA COLI such as ESCHERICHIA COLI O157.
The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)
A sequence of successive nucleotide triplets that are read as CODONS specifying AMINO ACIDS and begin with an INITIATOR CODON and end with a stop codon (CODON, TERMINATOR).
The biosynthesis of PEPTIDES and PROTEINS on RIBOSOMES, directed by MESSENGER RNA, via TRANSFER RNA that is charged with standard proteinogenic AMINO ACIDS.
Proteins from BACTERIA and FUNGI that are soluble enough to be secreted to target ERYTHROCYTES and insert into the membrane to form beta-barrel pores. Biosynthesis may be regulated by HEMOLYSIN FACTORS.
Encrustations, formed from microbes (bacteria, algae, fungi, plankton, or protozoa) embedding in extracellular polymers, that adhere to surfaces such as teeth (DENTAL DEPOSITS); PROSTHESES AND IMPLANTS; and catheters. Biofilms are prevented from forming by treating surfaces with DENTIFRICES; DISINFECTANTS; ANTI-INFECTIVE AGENTS; and antifouling agents.
The ability of bacteria to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).
A plasmid whose presence in the cell, either extrachromosomal or integrated into the BACTERIAL CHROMOSOME, determines the "sex" of the bacterium, host chromosome mobilization, transfer via conjugation (CONJUGATION, GENETIC) of genetic material, and the formation of SEX PILI.
A rather large group of enzymes comprising not only those transferring phosphate but also diphosphate, nucleotidyl residues, and others. These have also been subdivided according to the acceptor group. (From Enzyme Nomenclature, 1992) EC 2.7.
Enumeration by direct count of viable, isolated bacterial, archaeal, or fungal CELLS or SPORES capable of growth on solid CULTURE MEDIA. The method is used routinely by environmental microbiologists for quantifying organisms in AIR; FOOD; and WATER; by clinicians for measuring patients' microbial load; and in antimicrobial drug testing.
One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.
Proteins which bind to DNA. The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases.
Proteins found in the PERIPLASM of organisms with cell walls.
Compounds and molecular complexes that consist of very large numbers of atoms and are generally over 500 kDa in size. In biological systems macromolecular substances usually can be visualized using ELECTRON MICROSCOPY and are distinguished from ORGANELLES by the lack of a membrane structure.
The level of protein structure in which regular hydrogen-bond interactions within contiguous stretches of polypeptide chain give rise to alpha helices, beta strands (which align to form beta sheets) or other types of coils. This is the first folding level of protein conformation.
A species of gram-positive bacteria that is a common soil and water saprophyte.
An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.
The relationships of groups of organisms as reflected by their genetic makeup.
That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.
A class of plasmids that transfer antibiotic resistance from one bacterium to another by conjugation.
A non-metabolizable galactose analog that induces expression of the LAC OPERON.
The space between the inner and outer membranes of a cell that is shared with the cell wall.
A property of the surface of an object that makes it stick to another surface.
A synthetic 1,8-naphthyridine antimicrobial agent with a limited bacteriocidal spectrum. It is an inhibitor of the A subunit of bacterial DNA GYRASE.
The process of cleaving a chemical compound by the addition of a molecule of water.
An antibiotic produced by the soil actinomycete Streptomyces griseus. It acts by inhibiting the initiation and elongation processes during protein synthesis.
A set of three nucleotides in a protein coding sequence that specifies individual amino acids or a termination signal (CODON, TERMINATOR). Most codons are universal, but some organisms do not produce the transfer RNAs (RNA, TRANSFER) complementary to all codons. These codons are referred to as unassigned codons (CODONS, NONSENSE).
The movement of materials (including biochemical substances and drugs) through a biological system at the cellular level. The transport can be across cell membranes and epithelial layers. It also can occur within intracellular compartments and extracellular compartments.
The lipopolysaccharide-protein somatic antigens, usually from gram-negative bacteria, important in the serological classification of enteric bacilli. The O-specific chains determine the specificity of the O antigens of a given serotype. O antigens are the immunodominant part of the lipopolysaccharide molecule in the intact bacterial cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
The extent to which an enzyme retains its structural conformation or its activity when subjected to storage, isolation, and purification or various other physical or chemical manipulations, including proteolytic enzymes and heat.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
An essential amino acid that is required for the production of HISTAMINE.
Widely used technique which exploits the ability of complementary sequences in single-stranded DNAs or RNAs to pair with each other to form a double helix. Hybridization can take place between two complimentary DNA sequences, between a single-stranded DNA and a complementary RNA, or between two RNA sequences. The technique is used to detect and isolate specific sequences, measure homology, or define other characteristics of one or both strands. (Kendrew, Encyclopedia of Molecular Biology, 1994, p503)
The presence of bacteria, viruses, and fungi in food and food products. This term is not restricted to pathogenic organisms: the presence of various non-pathogenic bacteria and fungi in cheeses and wines, for example, is included in this concept.
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.
A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.
The reconstruction of a continuous two-stranded DNA molecule without mismatch from a molecule which contained damaged regions. The major repair mechanisms are excision repair, in which defective regions in one strand are excised and resynthesized using the complementary base pairing information in the intact strand; photoreactivation repair, in which the lethal and mutagenic effects of ultraviolet light are eliminated; and post-replication repair, in which the primary lesions are not repaired, but the gaps in one daughter duplex are filled in by incorporation of portions of the other (undamaged) daughter duplex. Excision repair and post-replication repair are sometimes referred to as "dark repair" because they do not require light.
Stable carbon atoms that have the same atomic number as the element carbon, but differ in atomic weight. C-13 is a stable carbon isotope.
Cells, usually bacteria or yeast, which have partially lost their cell wall, lost their characteristic shape and become round.
Gram-negative, non-motile, capsulated, gas-producing rods found widely in nature and associated with urinary and respiratory infections in humans.
Polysaccharides found in bacteria and in capsules thereof.
Proteins which maintain the transcriptional quiescence of specific GENES or OPERONS. Classical repressor proteins are DNA-binding proteins that are normally bound to the OPERATOR REGION of an operon, or the ENHANCER SEQUENCES of a gene until a signal occurs that causes their release.
Processes involved in the formation of TERTIARY PROTEIN STRUCTURE.
Porins are protein molecules that were originally found in the outer membrane of GRAM-NEGATIVE BACTERIA and that form multi-meric channels for the passive DIFFUSION of WATER; IONS; or other small molecules. Porins are present in bacterial CELL WALLS, as well as in plant, fungal, mammalian and other vertebrate CELL MEMBRANES and MITOCHONDRIAL MEMBRANES.
The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS.
A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that ferments sugar without gas production. Its organisms are intestinal pathogens of man and other primates and cause bacillary dysentery (DYSENTERY, BACILLARY).
A fractionated cell extract that maintains a biological function. A subcellular fraction isolated by ultracentrifugation or other separation techniques must first be isolated so that a process can be studied free from all of the complex side reactions that occur in a cell. The cell-free system is therefore widely used in cell biology. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p166)
A syndrome that is associated with microvascular diseases of the KIDNEY, such as RENAL CORTICAL NECROSIS. It is characterized by hemolytic anemia (ANEMIA, HEMOLYTIC); THROMBOCYTOPENIA; and ACUTE RENAL FAILURE.
The most abundant form of RNA. Together with proteins, it forms the ribosomes, playing a structural role and also a role in ribosomal binding of mRNA and tRNAs. Individual chains are conventionally designated by their sedimentation coefficients. In eukaryotes, four large chains exist, synthesized in the nucleolus and constituting about 50% of the ribosome. (Dorland, 28th ed)
A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).
Proteins which are synthesized in eukaryotic organisms and bacteria in response to hyperthermia and other environmental stresses. They increase thermal tolerance and perform functions essential to cell survival under these conditions.
Directed modification of the gene complement of a living organism by such techniques as altering the DNA, substituting genetic material by means of a virus, transplanting whole nuclei, transplanting cell hybrids, etc.
Immunoglobulins produced in a response to BACTERIAL ANTIGENS.
Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES.
Any member of the group of ENDOPEPTIDASES containing at the active site a serine residue involved in catalysis.
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
A dextrodisaccharide from malt and starch. It is used as a sweetening agent and fermentable intermediate in brewing. (Grant & Hackh's Chemical Dictionary, 5th ed)
A toxin produced by SHIGELLA DYSENTERIAE. It is the prototype of class of toxins that inhibit protein synthesis by blocking the interaction of ribosomal RNA; (RNA, RIBOSOMAL) with PEPTIDE ELONGATION FACTORS.
Lipid-containing polysaccharides which are endotoxins and important group-specific antigens. They are often derived from the cell wall of gram-negative bacteria and induce immunoglobulin secretion. The lipopolysaccharide molecule consists of three parts: LIPID A, core polysaccharide, and O-specific chains (O ANTIGENS). When derived from Escherichia coli, lipopolysaccharides serve as polyclonal B-cell mitogens commonly used in laboratory immunology. (From Dorland, 28th ed)
A species of gram-negative, aerobic, rod-shaped bacteria commonly isolated from clinical specimens (wound, burn, and urinary tract infections). It is also found widely distributed in soil and water. P. aeruginosa is a major agent of nosocomial infection.
Enzymes that catalyze the breakage of a carbon-oxygen bond leading to unsaturated products via the removal of water. EC 4.2.1.
A class of enzymes that catalyze the cleavage of C-C, C-O, and C-N, and other bonds by other means than by hydrolysis or oxidation. (Enzyme Nomenclature, 1992) EC 4.
An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.
A hexose or fermentable monosaccharide and isomer of glucose from manna, the ash Fraxinus ornus and related plants. (From Grant & Hackh's Chemical Dictionary, 5th ed & Random House Unabridged Dictionary, 2d ed)
The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A subclass of enzymes that aminoacylate AMINO ACID-SPECIFIC TRANSFER RNA with their corresponding AMINO ACIDS.
DNA molecules capable of autonomous replication within a host cell and into which other DNA sequences can be inserted and thus amplified. Many are derived from PLASMIDS; BACTERIOPHAGES; or VIRUSES. They are used for transporting foreign genes into recipient cells. Genetic vectors possess a functional replicator site and contain GENETIC MARKERS to facilitate their selective recognition.
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).
Sensitive tests to measure certain antigens, antibodies, or viruses, using their ability to agglutinate certain erythrocytes. (From Stedman, 26th ed)
Diseases of domestic cattle of the genus Bos. It includes diseases of cows, yaks, and zebus.

Molecular basis for the enterocyte tropism exhibited by Salmonella typhimurium type 1 fimbriae. (1/525)

Salmonella typhimurium exhibits a distinct tropism for mouse enterocytes that is linked to their expression of type 1 fimbriae. The distinct binding traits of Salmonella type 1 fimbriae is also reflected in their binding to selected mannosylated proteins and in their ability to promote secondary bacterial aggregation on enterocyte surfaces. The determinant of binding in Salmonella type 1 fimbriae is a 35-kDa structurally distinct fimbrial subunit, FimHS, because inactivation of fimHS abolished binding activity in the resulting mutant without any apparent effect on fimbrial expression. Surprisingly, when expressed in the absence of other fimbrial components and as a translational fusion protein with MalE, FimHS failed to demonstrate any specific binding tropism and bound equally to all cells and mannosylated proteins tested. To determine if the binding specificity of Salmonella type 1 fimbriae was determined by the fimbrial shaft that is intimately associated with FimHS, we replaced the amino-terminal half of FimHS with the corresponding sequence from Escherichia coli FimH (FimHE) that contains the receptor binding domain of FimHE. The resulting hybrid fimbriae bearing FimHES on a Salmonella fimbrial shaft exhibited binding traits that resembled that of Salmonella rather than E. coli fimbriae. Apparently, the quaternary constraints imposed by the fimbrial shaft on the adhesin determine the distinct binding traits of S. typhimurium type 1 fimbriae.  (+info)

P fimbriae and other adhesins enhance intestinal persistence of Escherichia coli in early infancy. (2/525)

Resident and transient Escherichia coli strains were identified in the rectal flora of 22 Pakistani infants followed from birth to 6 months of age. All strains were tested for O-antigen expression, adhesin specificity (P fimbriae, other mannose-resistant adhesins or type 1 fimbriae) and adherence to the colonic cell line HT-29. Resident strains displayed higher mannose-resistant adherence to HT-29 cells, and expressed P fimbriae (P = 0.0036) as well as other mannose-resistant adhesins (P = 0.012) more often than transient strains. In strains acquired during the first month of life, P fimbriae were 12 times more frequent in resident than in transient strains (P = 0.0006). The O-antigen distribution did not differ between resident and transient strains, and none of the resident P-fimbriated strains belonged to previously recognized uropathogenic clones. The results suggest that adhesins mediating adherence to intestinal epithelial cells, especially P fimbriae, enhance the persistence of E. coli in the large intestine of infants.  (+info)

Organization of biogenesis genes for aggregative adherence fimbria II defines a virulence gene cluster in enteroaggregative Escherichia coli. (3/525)

Several virulence-related genes have been described for prototype enteroaggregative Escherichia coli (EAEC) strain 042, which has been shown to cause diarrhea in human volunteers. Among these factors are the enterotoxins Pet and EAST and the fimbrial antigen aggregative adherence fimbria II (AAF/II), all of which are encoded on the 65-MDa virulence plasmid pAA2. Using nucleotide sequence analysis and insertional mutagenesis, we have found that the genes required for the expression of each of these factors, as well as the transcriptional activator of fimbrial expression AggR, map to a distinct cluster on the pAA2 plasmid map. The cluster is 23 kb in length and includes two regions required for expression of the AAF/II fimbria. These fimbrial biogenesis genes feature a unique organization in which the chaperone, subunit, and transcriptional activator lie in one cluster, whereas the second, unlinked cluster comprises a silent chaperone gene, usher, and invasin reminiscent of Dr family fimbrial clusters. This plasmid-borne virulence locus may represent an important set of virulence determinants in EAEC strains.  (+info)

Adhesins as targets for vaccine development. (4/525)

Blocking the primary stages of infection, namely bacterial attachment to host cell receptors and colonization of the mucosal surface, may be the most effective strategy to prevent bacterial infections. Bacterial attachment usually involves an interaction between a bacterial surface protein called an adhesin and the host cell receptor. Recent preclinical vaccine studies with the FimH adhesin (derived from uropathogenic Escherichia coli) have confirmed that antibodies elicited against an adhesin can impede colonization, block infection, and prevent disease. The studies indicate that prophylactic vaccination with adhesins can block bacterial infections. With recent advances in the identification, characterization, and isolation of other adhesins, similar approaches are being explored to prevent infections, from otitis media and dental caries to pneumonia and sepsis.  (+info)

The mast cell tumor necrosis factor alpha response to FimH-expressing Escherichia coli is mediated by the glycosylphosphatidylinositol-anchored molecule CD48. (5/525)

Mast cells are well known for their harmful role in IgE-mediated hypersensitivity reactions, but their physiological role remains a mystery. Several recent studies have reported that mast cells play a critical role in innate immunity in mice by releasing tumor necrosis factor alpha (TNF-alpha) to recruit neutrophils to sites of enterobacterial infection. In some cases, the mast cell TNF-alpha response was triggered when these cells directly bound FimH on the surface of Escherichia coli. We have identified CD48, a glycosylphosphatidylinositol-anchored molecule, to be the complementary FimH-binding moiety in rodent mast cell membrane fractions. We showed that (i) pretreatment of mast cell membranes with antibodies to CD48 or phospholipase C inhibited binding of FimH+ E. coli, (ii) FimH+ E. coli but not a FimH- derivative bound isolated CD48 in a mannose-inhibitable manner, (iii) binding of FimH+ bacteria to Chinese hamster ovary (CHO) cells was markedly increased when these cells were transfected with CD48 cDNA, and (iv) antibodies to CD48 specifically blocked the mast cell TNF-alpha response to FimH+ E. coli. Thus, CD48 is a functionally relevant microbial receptor on mast cells that plays a role in triggering inflammation.  (+info)

Decay-accelerating factor and cytoskeleton redistribution pattern in HeLa cells infected with recombinant Escherichia coli strains expressing Dr family of adhesins. (6/525)

Escherichia coli strains expressing Dr fimbriae are able to enter epithelial cells by interacting with a complement-regulatory protein, decay-accelerating factor. This model of bacterial internalization, with a well-characterized bacterial ligand and host receptor, provides a unique opportunity to investigate the early stages of invasion. We used immunofluorescence staining techniques to examine the distribution of receptor and cytoskeletal proteins in HeLa cells infected with E. coli recombinant strains that expressed Dr family of adhesins: Dr, Dr-II, F1845, AFA-I, and AFA-III. A major rearrangement of decay-accelerating factor was found at the adherence sites of recombinant strains expressing Dr, Dr-II, and F1845 adhesins. The changes in the distribution of receptor were significantly smaller on HeLa cells infected with E. coli bearing AFA-I or AFA-III afimbrial adhesins. Receptor aggregation was associated with the redistribution of cytoskeleton-associated proteins such as actin, alpha-actinin, ezrin, and occasionally tropomyosin. Purified Dr fimbriae coated on polystyrene beads were capable of triggering clustering of receptor and accumulating actin at the adhesion sites of beads to HeLa cells. Using scanning and transmission electron microscopic techniques, we have shown that beads coated with Dr fimbriae, as opposed to beads coated with bovine serum albumin, were enwrapped by cellular microvilli and ultimately internalized into HeLa cells. This indicates that interaction of Dr fimbriae with decay-accelerating factor is associated with redistribution of receptor and is sufficient to promote bacterial internalization.  (+info)

X-ray structure of the FimC-FimH chaperone-adhesin complex from uropathogenic Escherichia coli. (7/525)

Type 1 pili-adhesive fibers expressed in most members of the Enterobacteriaceae family-mediate binding to mannose receptors on host cells through the FimH adhesin. Pilus biogenesis proceeds by way of the chaperone/usher pathway. The x-ray structure of the FimC-FimH chaperone-adhesin complex from uropathogenic Escherichia coli at 2.5 angstrom resolution reveals the basis for carbohydrate recognition and for pilus assembly. The carboxyl-terminal pilin domain of FimH has an immunoglobulin-like fold, except that the seventh strand is missing, leaving part of the hydrophobic core exposed. A donor strand complementation mechanism in which the chaperone donates a strand to complete the pilin domain explains the basis for both chaperone function and pilus biogenesis.  (+info)

Virulence characteristics of Escherichia coli in acute bacterial prostatitis. (8/525)

To assess the urovirulence characteristics of Escherichia coli strains causing acute prostatitis, urinary isolates from men with acute prostatitis (n=107) and from women with acute uncomplicated pyelonephritis (n=76) were examined for the prevalence of sfa, foc, and 3 papG allele genotypes and phenotypes and for the production of alpha-hemolysin and cytotoxic necrotizing factor 1. The papG allele III and foc gene were found more frequently and the papG allele II less frequently among prostatitis than from pyelonephritis isolates. A higher proportion of hly+ cnf1+ genotype in prostatitis strains (64% vs. 36%) was particularly striking. Both prostatitis and pyelonephritis strains expressed virulence factors similarly except for a higher proportion of nonhemolytic prostatitis isolates. Although the pathogenetic mechanisms of urinary tract infections in men and women may differ, virulence factors such as adhesins and cytotoxins may have important roles in the pathogenesis of acute prostatitis.  (+info)

The O26 serogroup of enteropathogenic Escherichia coli (EPEC) is one of the serogroups most frequently implicated in infant diarrhea and is also common among enterohemorrhagic E. coli (EHEC) strains. the most common O26 strains belong to EPEC/EHEC serotype O26:H11 and are generally Shiga toxin (Stx) positive. Stx-negative E. coli strains that are negative for the EPEC EAF plasmid and bundle-forming pilus (Bfp) are classified as atypical EPEC. Here, we report a novel adhesin present in an stx-negative bfpA-negative atypical EPEC O26:H11 strain isolated from an infant with diarrhea. A cloned 15-kb genomic region from this strain, designated the locus for diffuse adherence (lda), confers diffuse adherence on HEp-2 cells when expressed in E. coli K-12. Sequence analysis of lda revealed a G+C content of 46.8% and 15 open reading frames sharing homology with the E. coli K88 fae and CS31A clp fimbrial operons. the lda region is part of a putative 26-kb genomic island inserted into the proP gene of the ...
Enteropathogenic Escherichia coli-like E. coli strains belonging to serovar O103:K-:H2 and rhamnose-negative biotypes are highly pathogenic diarrhea-inducing strains for weaned European rabbits. We describe here the cloning and sequencing of the major subunit gene of a new fimbrial adhesin, adhesive factor/rabbit 2 (AF/R2), which confers on these strains the ability to attach to rabbit enterocytes and to HeLa cells in a diffuse manner and which is associated with in vivo virulence. The chromosomal operon that encodes functional AF/R2 has been cloned from strain B10. The major subunit gene afr2G, as well as an adjacent open reading frame, afr2H, has been sequenced. The Afr2G protein shows homologies with FaeG and ClpG, which are the respective major subunits of fimbrial adhesin K88 (F4) and afimbrial adhesin CS31A. Plasmid carrying the operon transcomplements an AF/R2-negative TnphoA mutant for its ability to express AF/R2. As a whole, AF/R2 is a new member of the E. coli K88 adhesin family which ...
Background: The discovery of the autotransporter family has provided a mechanism for surface expression of proteins in laboratory strains of Escherichia coli. We have previously reported the use of the AIDA-I autotransport system to express the Salmonella enterica serovar Enteritidis proteins SefA and H: gm. The SefA protein was successfully exposed to the medium, but the orientation of H:gm in the outer membrane could not be determined due to proteolytic cleavage of the N-terminal detection-tag. The goal of the present work was therefore to construct a vector containing elements that facilitates analysis of surface expression, especially for proteins that are sensitive to proteolysis or otherwise difficult to express. Results: The surface expression system pAIDA1 was created with two detection tags flanking the passenger protein. Successful expression of SefA and H:gm on the surface of E. coli was confirmed with fluorescently labeled antibodies specific for the N-terminal His(6)-tag and the ...
If screening applications are viable for the success of your R&D efforts, a very unique approach can help:. Our proprietary technologies MATE and Autodisplay enable the development of cost-efficient high-throughput screening tools for the identification of binding partners such as inhibitors, activators, biomarkers or autoantigens. The use of fluorescence marked libraries speeds up the process significantly, when coupled to fluorescence activated cell sorting (FACS).. Find out how our custom-tailored products and services can assist in bringing your R&D processes forward ...
S fimbrial adhesins (Sfa) enable pathogenic Escherichia coli strains to bind to sialic acid-containing eucaryotic receptor molecules. In order to determine the influence of culture conditions on the expression of the sfa determinant in a wild-type strain, we fused the gene lacZ, coding for the enzyme beta-galactosidase, to the sfaA gene, responsible for the major protein subunit of S fimbriae. By using a plasmid which carries an R6K origin, the sfaA-lac hybrid construct was site-specifically integrated into the chromosome of the uropathogenic E. coli strain 536WT. The expression of lacZ, which was under the control of the sfa wild-type promoters, was now equivalent to the sfa expression of strain 536WT. With the help of this particular wild-type construct, it was demonstrated that the sfa determinant is better expressed on solid media than in liquid broth. The growth rate had a strong influence on Sfa expression under aerobic but not under anaerobic conditions. Production of Sfa was further ...
Autotransporter proteins are synthesized as multidomain proteins containing all structural requirements for the transport to the cell surface. They contain an N-terminal signal peptide typical for the Sec pathway, enabling export across the inner membrane. After truncation of the signal peptide in the periplasm, the C-terminal domain folds into the outer membrane as a porine-like structure, a so called β-barrel. The passenger domain can be efficiently translocated to the extracellular milieu by this structure. Recombinant passengers can be transported to the surface by simple insertion of the corresponding coding sequence into a distinct position of the precursor gene.. .reading-box-container-2 .element-bottomshadow:before,.reading-box-container-2 .element-bottomshadow:after{opacity:0.7;} ...
Papež Jan Pavel II. se již poněkolikáté vrátil do nemocnice, vážně nemocen. I pro nekatolíky, jako jsem já, jde o příležitost k zamyšlení, o co svět přijde, až papežovo tělo nakonec podlehne svým neduhům. Obraz, který vyvstane, je směsicí barev. Pro ty z nás, kdo považují pád komunismu z roku 1989 za zásadní událost dějin dvacátého století, je papež Jan Pavel hrdina. V Polsku byl ohniskem všech aktivit občanské společnosti. Zatímco v ostatních zemích, nejsilněji v Rumunsku, ale i v tehdejším Československu a v Maďarsku, vedle komunismu bylo vakuum nebo přinejlepším několik izolovaných organizací občanské společnosti, Polsko mělo alternativní zdroj legitimity. Tehdejší krakovský kardinál Karol Wojtyla byl jeho nejpůsobivějším představitelem, před svým zvolením i po něm. Zvolení kardinála Wojtyly papežem tak svým významem přesahovalo hranice církve. On sám vlastně ztotožňování své církve s občanskou ...
When you exercise heavily, you lose water and salt in your sweat. One good source is Emergen-C®. Emergen-C has an advantage over water because it is packed with the potassium, magnesium, calcium, sodium and sugar to provide electrolyte replenishment and energy during workouts Athletes can stave off fatigue longer if they fortify their water with…
The S fimbrial adhesin (sfa) determinant of E. coli comprises nine genes situated on a stretch of 7.9 kilobases (kb) DNA. Here… Expand ...
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Pentadbiran Makanan dan Dadah AS (FDA) telah meluluskan permintaan ASC Therapeutics untuk membuka percubaan klinikal di AS mengenai keselamatan dan keberkesanan awal ASC618, terapi gen generasi kedua untuk hemofilia A. Percubaan Fasa 1/2 (NCT04676048 ), yang akan bermula pada bulan ini, akan menguji terapi sekali sahaja sehingga 12 orang dewasa dengan hemofilia sederhana hingga teruk A. Maklumat hubungan boleh didapati di sini; laman web pendaftaran belum didedahkan.
Moonens, K., J. Bouckaert, A. Coddens, T. Tran, S. Panjikar, M. De Kerpel, E. Cox, H. Remaut, and H. De Greve, Structural insight in histo-blood group binding by the F18 fimbrial adhesin FedF., Mol Microbiol, vol. 86, issue 1, pp. 82-95, 2012 Oct. ...
Maumivu ya nyonga siyo ugonjwa bali ni dalili ya uwepo wa tatizo la kiafya. Maumivu haya yanaweza kuwa ya muda mfupi au ya muda mrefu na hutokea kweye nyonga
Michaelis, W. , Seifert, R. , Nauhaus, K. , Treude, T. , Thiel, V. , Blumenberg, M. , Knittel, K. , Gieseke, A. , Peterknecht, K. , Pape, T. , Boetius, A. , Amann, R. , Jorgensen, B. B. , Widdel, F. , Peckmann, J. , Pimenov, N. V. and Gulin, M. B. (2002 ...
Nitsch, J.; Pregger, T.; Naegler, T.; Heide, D.; Scholz, Y.; Luca de Tena, D.; Trieb, F.; Nienhaus, K.; Gerhardt, N.; Sterner, M.; Trost, T.; von Oehsen, A.; Schwinn, R.; Pape, C.; Hahn, H.; Wickert, M.; Wenzel, B.. ...
TY - JOUR. T1 - Aggregative adherence fimbriae II of enteroaggregative Escherichia coli are required for adherence and barrier disruption during infection of human colonoids. AU - Gonyar, Laura A.. AU - Smith, Rachel M.. AU - Giron, Jorge A.. AU - Zachos, Nicholas C.. AU - Ruiz-Perez, Fernando. AU - Nataro, James P.. N1 - Funding Information: This work was supported by the National Institutes of Health (P01-AI125181) to J.P.N. and by the Hartwell Foundation through a postdoctoral research fellowship to L.A.G. We acknowledge the Integrated Physiology Core of the Hopkins Conte Digestive Disease Basic and Translational Research Core Center (NIH P30 DK-089502).. PY - 2020/9. Y1 - 2020/9. N2 - Symptomatic and asymptomatic infection with the diarrheal pathogen enteroaggregative Escherichia coli (EAEC) is associated with growth faltering in children in developing settings. The mechanism of this association is unknown, emphasizing a need for better understanding of the interactions between EAEC and the ...
We recently reported that the type 1-fimbriated Escherichia coli strains CSH-50 and HB101(pPKL4), both K-12 derivatives, have different patterns of adhesion to yeast mannan, human plasma fibronectin, and fibronectin derivatives, suggesting functional heterogeneity of type 1 fimbriae. In this report, we provide evidence that this functional heterogeneity is due to variations in the fimH genes. We also investigated functional heterogeneity among clinical isolates and whether variation in fimH genes accounts for differences in receptor specificity. Twelve isolates obtained from human urine were tested for their ability to adhere to mannan, fibronectin, periodate-treated fibronectin, and a synthetic peptide copying the 30 amino-terminal residues of fibronectin. CSH-50 and HB101(pPKL4) were tested for comparison. Selected isolates were also tested for adhesion to purified fragments spanning the entire fibronectin molecule. Three distinct functional classes, designated M, MF, and MFP, were observed. ...
Enteroaggregative Escherichia coli (EAEC) is a recognized cause of acute diarrhea among both children and adults worldwide. EAEC strains are characterized by the presence of aggregative adherence fimbriae (AAF), which play a key role in pathogenesis by mediating attachment to the intestinal mucosa and by triggering host inflammatory responses. The aggregative adherence fimbria II (AAF/II) is the most important adherence factor of EAEC prototype strain 042 (EAEC042) to intestinal cells. Multiple receptors for AAF/II on epithelial cells have been identified including the transmembrane signaling mucin Muc1. This protocol describes a method to measure adherence of EAEC strains to HEK293 cells expressing the Muc1 glycoprotein.
The adhesin involved in diffuse adherence (AIDA) is an autotransporter protein that confers the diffuse adherence phenotype to certain diarrheagenic Escherichia coli strains. It consists of a 49 amino acid signal peptide, a 797 amino acid passenger domain, and a 440 amino acid beta-domain integrated into the outer membrane. The beta-domain consists of two parts: the beta(1)-domain, which is predicted to form two beta-strands on the bacterial cell surface, and the beta(2)-domain, which constitutes the transmembrane domain. We have previously shown that the beta-domain can be folded from the urea-denatured state when bound to a nickel column during purification. It has not been possible to achieve proper refolding of the beta-domain in solution; instead, a misfolded state C is formed. Here, we characterize this misfolded state in greater detail, showing that despite being misfolded, C can be analyzed as a conventional conformational state, with cooperative unfolding in urea and SDS as well as ...
Surface expression has attracted much recent interest, and it has been suggested for a variety of applications. Two such applications are whole-cell biocatalysis and the creation of live vaccines. For successful implementation of these applications there is a need for flexible surface expression systems that can yield a high level of expression with a variety of recombinant fusion proteins. The aim of this work was thus to create a surface expression system that would fulfil these requirements.. A novel surface expression system based on the AIDA-I autotransporter was created with the key qualities being are good, protein-independent detection of the expression through the presence of two epitope tags flanking the recombinant protein, and full modularity of the different components of the expression cassette. To evaluate the flexibility of this construct, 8 different model proteins with potential use as live-vaccines or biocatalysts were expressed and their surface expression levels were ...
Background & Objective: Patient satisfaction is an indicator of the health services that is increasingly important in today's competitive world and perhaps the simplest method for evaluation of family physician program. This study aimed to determine the level of satisfaction of service recipients in urban areas in Fasa, Iran, with ...
Dive into the research topics of Protease activity, secretion, cell entry, cytotoxicity, and cellular targets of secreted autotransporter toxin of uropathogenic Escherichia coli. Together they form a unique fingerprint. ...
The ability of Escherichia coli to express the K88 fimbrial adhesin was satisfactorily indicated by the combined techniques of ELISA, haemagglutination and latex agglutination. Detection of expression by electron microscopy and the ability to metabolize raffinose were unsuitable. Quantitative expression of the K88 adhesin was determined by ELISA. Expression was found to vary according to the E.coli strain examined, media type and form. In general it was found that the total amount was greater, while the amount/cfu was less on agar than in broth cultures. Expression of the K88 adhesin during unshaken batch culture was related to the growth rate and was maximal during late logarithmic to early stationary phase. A combination of heat extraction, ammonium sulphate and isoelectric precipitation was found suitable for both large and small scale preparation of purified K88ab adhesin. Extraction of the K88 adhesin was sensitive to pH and it was postulated that this may affect the site of colonisation of ...
Pape Seydou NDiaye, latest news & rumours, player profile, detailed statistics, career details and transfer information for the ASC les Jaraaf de Dakar player, powered by Goal.com.
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The property market is amid a mini-boom. However, it is not as simple as finding and buying a property. Tiba Raja, Director of Market Financial Solutions explains why.
Define adhesin: any of various specialized molecular components (such as proteins) on the surface of a bacterial cell that… - adhesin in a sentence
I work on an uropathogenic strain of E.coli. When I artificially express from a plasmid one of the transcriptional regulator, it results in secretion of a protein factor in the media, which has interesting biological roles. My aim is to purify this unknown factor present in the growth media and to identify it by Mass Spec ...
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Hi guys, little question, on pape 33 of DX8 manual under gyro it says, The DX8 displays gyro gain values as N for Normal gain and a T for tail
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The main causative agent of human urinary tract infections is the uropathogenic Escherichia coli (UPEC) pathotype. It may cause disease due to its ability to express a number of bacterial virulence factors. Fimbrial adhesins are particularly important for the initial establishment of infection in the urinary tract. The fimbriae are hair-like structures protruding from the bacterial cell and by attaching to specific receptors in the urinary tract they mediate adherence to different cell types, allowing the bacteria to resist the shear forces from urine flow. The UPEC strains generally carry multiple determinants for fimbrial adhesins. Previous studies have indicated that there is a co-regulation between different fimbrial genes and one factor that has been implicated in this is the PapB protein, acting as a transcriptional regulator of P-fimbrial expression. The PapB protein can be regarded as the prototype of a family of fimbrial regulators that show high homology between different fimbrial ...
Escherichia coli colonizes the human intestine shortly after birth, with most strains engaging in a commensal relationship. However, some E. coli strains have evolved toward acquiring genetic traits associated with virulence. Currently, five categories of enteroadherent E. coli strains are well-recognized, and are classified in regard to expressed adhesins and the strategy used during the colonization. The high morbidity associated with diarrhea has motivated investigations focusing on E. coli adhesins, as well on factors that inhibit bacterial adherence. Breastfeeding has proved to be the most effective strategy for preventing diarrhea in children. Aside from the immunoglobulin content, glycocompounds and oligosaccharides in breast milk play a critical role in the innate immunity against diarrheagenic E. coli strains. This review summarizes the colonization factors and virulence strategies exploited by diarrheagenic E. coli strains, addressing the inhibitory effects that oligosaccharides and
Fig. 2. Biofilm formation by E. coli cells expressing FimH variants. Each FimH variant is indicated by its expression plasmid. (A) Biofilm formation on a microtiter plate surface by cells expressing the K-12 fimH allele when grown in LB under static conditions. (B) Biofilm formation on a microtiter plate surface by cells expressing FimH variants when grown in LB under HDF conditions. Note that no biofilm is produced by the K-12fimH allele (pMAS1) under these conditions. (C) Quantification of biofilm formation as determined by the amount of crystal violet staining for each of the FimH variants. All experiments were performed in the presence and absence of methyl-α-d-mannopyranoside (α mm). Results are expressed as the average of four independent experiments (± standard deviation). ...
The production of fimbrial adhesins K99 and F41 by enterotoxigenic Escherichia coli has been measured in steady-state chemostat experiments at various specific growth rates (microseconds) and in a recycling fermentor across a range of mu values falling to less than 0.004 h-1. It has been demonstrated that the production of K99 and F41 fimbriae is correlated with mu both in aerobic and anaerobic chemostat experiments. A significant production of fimbriae was only detected at mu values higher than 0.2 h-1. This behavior was further examined by culturing the bacteria in a recycling fermentor with complete biomass retention. It could be shown that the production of K99 and F41 fimbriae only occurred during balanced growth, with a high biomass yield at mu values higher than 0.04 h-1 corresponding to mass doubling times (td) of less than 17 h. The production of both fimbriae halted during balanced growth with a lower biomass yield (at mu values between 0.012 and 0.04 h-1 corresponding to td values ...
Urinary tract infections (UTIs) result in $1.6 billion in medical expenditures in the United States each year (1), with uropathogenic strains of Escherichia coli (UPEC) accounting for 70 to 95% of all UTIs (2). With the advance of multi-drug-resistant UPEC (3), it is important to determine the pathogenic mechanisms of UPEC. In animal models, UPEC pathogenesis initiates with bacterial binding of superficial bladder epithelial cells via the adhesin FimH at the tips of bacterially expressed type 1 pili (4). Initial colonization events activate inflammatory and apoptotic cascades in the epithelium, which is normally inert and only turns over every 6 to 12 months (5). Bladder epithelial cells respond to invading bacteria in part by recognizing bacterial lipopolysaccharide (LPS) via the Toll-like receptor 4 (TLR-4)-CD14 pathway, which results in strong neutrophil influx into the bladder (6). In addition, FimH-mediated interactions with the bladder epithelium stimulate exfoliation of superficial ...
UPEC utilizes complex mechanisms to subvert innate defenses to persist and cause disease. The ability of UPEC to invade into superficial cells of the bladder has been shown to be a critical mechanism in the ability of UPEC to establish a persistent infection (8, 12, 14, 15). Upon entry, UPEC diverts itself into the cytoplasm by an unknown mechanism that depends on the FimH adhesin present at the tips of type 1 pili (7). Previous light and electron microscopic studies identified loose intracellular collections of bacteria at early time points (≈6 h) in the superficial umbrella cells of the bladder, which were termed bacterial factories (8). In addition, at later time points (24 h) intracellular biofilm-like communities were observed that created a bulging appearance on the luminal surface of the bladder that were termed pods (15). Based on real-time fluorescence microscopy studies presented here, we discovered that these various structures are formed as part of a continuous developmental and ...
The paper in Nature Microbiology can be found here. The work presented in this paper was the result of a strong collaboration between the laboratories of Dr. Scott J. Hultgren and Dr. Peng Yuan at Washington University in St. Louis. Chaperone-usher pathway (CUP) pili are extracellular proteinaceous fibers ubiquitously found on Gram-negative bacteria. Type 1 and P pili are produced by uropathogenic strains of E. coli and are tipped with the FimH and PapG adhesins, respectively, to mediate host and tissue tropism to the bladder and kidney. During pilus assembly hundreds of individual pilus subunits called pilins are first exported across the inner membrane to the periplasm. Chaperone-pilin complexes are then guided to an outer membrane (OM) nanomachine called the usher, which catalyzes subunit-subunit interactions. The usher contains five functional domains: a 24-stranded transmembrane β-barrel domain, a β-sandwich plug domain that resides in the pore of the TD in the apo-usher, an ...
Previous reports showed successful applications of FimH antagonists in vitro and in vivo. The antagonists reduced bacterial attachment to cells and surfaces and decreased bladder infections in a UTI mouse model. Within this thesis, FimH antagonists from our group were screened for their minimal anti-adhesive concentration (MAC90) using an in vitro cell infection assay. The minimal therapeutic concentration was analyzed in the context of the pharmacokinetic (PK) performance of individual antagonists. It could be shown, that a preventive application and the resulting peak concentration of a FimH antagonist in the urine relative to the MAC90 value is predictive for positive treatment outcome. Guided by this finding, several treatment regimens, including combination therapies with antibiotics, were successfully applied to reduce bladder infections in an experimental mouse model by up to three orders of magnitude. Furthermore, FimH antagonists were effective against catheter-associated UTI (CAUTI), ...
1O9Z: The Fimbrial Adhesin F17-G of Enterotoxigenic Escherichia Coli Has an Immunoglobulin-Like Lectin Domain that Binds N-Acetylglucosamine
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1 Sequence alignment [w] Consider the strings APPLE and PAPE over the alphabet E = {A,E,L,P} and a penalty matrix P: A E L P A 1 E 1 1 L. 2 1 2 Compute the sequ
Vanwetswinkel, S., A. Volkov, Y. G. J. Sterckx, A. Garcia-Pino, L. Buts, W. F. Vranken, J. Bouckaert, R. Roy, L. Wyns, and N. A. J. van Nuland, Study of the structural and dynamic effects in the FimH adhesin upon α-d-heptyl mannose binding., J Med Chem, vol. 57, issue 4, pp. 1416-27, 2014 Feb 27. ...
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Berichte zur Polar- und Meeresforschung (Reports on Polar and Marine Research), Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 473 , 103 p ...
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Found in the outer membrane of gram-negative enterobacteria such as Shigella flexneri, Yersinia pestis, Escherichia coli, and ... Kukkonen M, Korhonen TK (July 2004). "The omptin family of enterobacterial surface proteases/adhesins: from housekeeping in ... Escherichia coli to systemic spread of Yersinia pestis". Int. J. Med. Microbiol. 294 (1): 7-14. doi:10.1016/j.ijmm.2004.01.003 ...
Other studies have shown that purified endotoxin from Escherichia coli can induce obesity and insulin-resistance when injected ... Kukkonen, Maini; Korhonen, Timo K. (July 2004). "The omptin family of enterobacterial surface proteases/adhesins: from ... housekeeping in Escherichia coli to systemic spread of Yersinia pestis". International Journal of Medical Microbiology. 294 (1 ... Bacterial genera associated with endotoxin-related obesity effects include Escherichia and Enterobacter. There is experimental ...
Escherichia coli and Burkholderia sp.) is linked to trimeric autotransporter adhesins and the second has enzymes genomically ... and later in other bacterial species such as Escherichia coli. N-glycosyltransferases usually target adhesin proteins, which ... Enterotoxigenic Escherichia coli uses a N-glycosyltransferase called EtpC to modify the EtpA protein, which is orthologous to ... Other homologues have been found in Burkholderia species, Escherichia coli, Haemophilus ducreyi, Mannheimia species, ...
"The PapG adhesin of uropathogenic Escherichia coli contains separate regions for receptor binding and for the incorporation ... She researched the genetic mechanism and control of host attachment by uropathogenic Escherichia coli as part of the Normark ... Tennent, J. M.; Lindberg, F.; Normark, S. (May 1990). "Integrity of Escherichia coli P pili during biogenesis: properties and ... "Horizontal gene transfer of the Escherichia coli pap and prs pili operons as a mechanism for the development of tissue-specific ...
September 2012). "Effects of cranberry extracts on growth and biofilm production of Escherichia coli and Staphylococcus species ... The adhesin for S. saprophyticus is a lactosamine structure. S. saprophyticus produces no exotoxins. Patients with urinary ... after Escherichia coli. Sexual activity increases the risk of S. saprophyticus UTIs because bacteria are displaced from the ...
MeSH D12.776.097.120.050.040 - adhesins, escherichia coli MeSH D12.776.097.120.300.500 - transferrin-binding protein a MeSH ...
MeSH D23.050.161.050 - adhesins, bacterial MeSH D23.050.161.050.040 - adhesins, escherichia coli MeSH D23.050.161.386 - ...
MeSH D12.776.543.100.050.040 - adhesins, escherichia coli MeSH D12.776.543.325.100.100 - gtp-binding protein alpha subunits, ...
Bacteria like Escherichia coli O157:H7 gain the majority of their virulence from mobile genetic elements. Gram-negative ... Bacteria produce various adhesins including lipoteichoic acid, trimeric autotransporter adhesins and a wide variety of other ... Exotoxins are also produced by a range of other bacteria including Escherichia coli; Vibrio cholerae (causative agent of ... These factors include adhesins, invasins, and antiphagocytic factors. The factors, including toxins, hemolysins and proteases, ...
The fim switch in Escherichia coli is the mechanism by which the fim gene cluster, encoding Type I Pili, is transcriptionally ... coding for an adhesin at the tip, to name just a few important elements. The fim S region is flanked by 9bp repeats that are ... Klemm, P (1986). "Two regulatory fim genes, fimB and fimE, control the phase variation of type 1 fimbriae in Escherichia coli ... These pili are virulence factors involved in adhesion, especially important in uropathogenic Escherichia coli. The gene ...
The Dr adhesins bind Dr blood group antigen (Dra) which is present on decay accelerating factor (DAF) on erythrocytes and other ... coli. List of strains of Escherichia coli "Escherichia coli O157:H7". CDC Division of Bacterial and Mycotic Diseases. Retrieved ... "Escherichia coli in chronic inflammatory bowel diseases: An update on adherent invasive Escherichia coli pathogenicity". World ... Escherichia coli (Latin pronunciation: [eskeˈrikja ˈkoli] Anglicized to /ˌɛʃəˈrɪkiə ˈkoʊlaɪ/; commonly abbreviated E. coli) is ...
... typically associated with Shiga toxin-producing Escherichia coli, which often encode the adhesin intimin). The putative cause ... coli (EPEC), enterotoxigenic E.coli (ETEC), Shiga toxin-producing E. coli (STEC) and Enteroaggregative E. coli (EAEC). E. coli ... Enteroaggregative Escherichia coli (EAEC or EAggEC) are a pathotype of Escherichia coli which cause acute and chronic diarrhea ... Nataro, James P.; Steiner, Theodore (2002), "Enteroaggregative and Diffusely Adherent Escherichia Coli", Escherichia Coli, ...
EIEC are highly invasive, and they use adhesin proteins to bind to and enter intestinal cells. They produce no toxins, but ... "Shigella and enteroinvasive Escherichia coli strains are derived from distinct ancestral strains of E. coli". Microbiology. 144 ... Enteroinvasive Escherichia coli (EIEC) is a type of pathogenic bacteria whose infection causes a syndrome that is identical to ... Escherichia coli, enteroinvasive Material Data Safety Sheets (Articles with short description, Short description is different ...
"Characterization of the essential gene glmM encoding phosphoglucosamine mutase in Escherichia coli". The Journal of Biological ... "The Haemophilus influenzae HMW1 adhesin is glycosylated in a process that requires HMW1C and phosphoglucomutase, an enzyme ... "Molecular cloning and characterization of the pgm gene encoding phosphoglucomutase of Escherichia coli". Journal of ... Enzymes from this superfamily are ubiquitous in organisms from E. Coli to humans, and catalyze a phosphoryl transfer reaction ...
The effectiveness of anti-adhesin antibodies is illustrated by studies with FimH, the adhesin of uropathogenic Escherichia coli ... Schembri MA, Klemm P (May 1998). "Heterobinary adhesins based on the Escherichia coli FimH fimbrial protein". Appl. Environ. ... August 1999). "X-ray structure of the FimC-FimH chaperone-adhesin complex from uropathogenic Escherichia coli". Science. 285 ( ... October 2011). "Type 1 fimbrial adhesin FimH elicits an immune response that enhances cell adhesion of Escherichia coli". ...
2008). "UpaG, a new member of the trimeric autotransporter family of adhesins in uropathogenic Escherichia coli". J Bacteriol. ... YadA stands for Yersinia adhesin protein A. This protein domain is an example of Trimeric Autotransporter Adhesins, and it was ... Trimeric autotransporter adhesins have a unique structure. The structure they hold is crucial to their function. They all ... All Trimeric Autotransporter Adhesins are crucial virulence factors that cause serious disease in humans. The most-studied and ...
OmpA from Escherichia coli is required for pathogenesis, and can interact with host receptor molecules. MotB (and MotA) serve ... De Mot R, Proost P, Van Damme J, Vanderleyden J (February 1992). "Homology of the root adhesin of Pseudomonas fluorescens OE ... Freudl R, Klose M, Henning U (June 1990). "Export and sorting of the Escherichia coli outer membrane protein OmpA". J. Bioenerg ... Hosking ER, Vogt C, Bakker EP, Manson MD (December 2006). "The Escherichia coli MotAB proton channel unplugged". J. Mol. Biol. ...
The Eib immunoglobulin-binding proteins from Escherichia coli were third, followed by the DsrA proteins of Haemophilus ducreyi ... and IgG Fc by distinct sequence segments of the EibF cell surface protein of Escherichia coli". Infect. Immun. 69 (12): 7293- ... YadA, an adhesin from Yersinia, was the first member of this family to be characterised. UspA2 from Moraxella was second. ... The importance of adhesins to YadA function and Yersinia survival is huge. Attachment further allows more interactions and ...
"Identification and characterization of mouse small intestine mucosal receptors for Escherichia coli K-12(K88ab)". Infection and ... McSweegan, E; Walker, R I (1986). "Identification and characterization of two Campylobacter jejuni adhesins for cellular and ... published research on the disease-causing mechanisms of the bacteria Campylobacter jejuni and Enterotoxigenic Escherichia coli ...
July 2016). "Escherichia coli Harboring mcr-1 and blaCTX-M on a Novel IncF Plasmid: First Report of mcr-1 in the United States ... adhesins, internalins), coordinate the activation of virulence genes (e.g. quorum sensing), and cause disease (e.g. exotoxins ... For example, glucose, mannitol, and fructose reduce antibiotic tolerance in Escherichia coli and Staphylococcus aureus, ... "Antimicrobial Activity of Selected Phytochemicals against Escherichia coli and Staphylococcus aureus and Their Biofilms". ...
Freudl R, MacIntyre S, Degen M, Henning U (1986). "Cell Surface Exposure of the Outer Membrane Protein OmpA of Escherichia coli ... Klemm P, Schembri MA (2000). "Bacterial Adhesins:Function and Structure". Int J Med Microbiol. 290 (1): 27-35. doi:10.1016/ ... Wang Y (2002). "The Function of OmpA in Escherichia coli". Biochem Biophys Res Commun. 292 (2): 396-401. doi:10.1006/bbrc. ... Many types of bacteria have cell surface proteins such as the enteropathogenic E. coli intimin protein which is involved in ...
Gardner TS, Cantor CR, Collins JJ (January 2000). "Construction of a genetic toggle switch in Escherichia coli". Nature. 403 ( ... coli to target surfaces, cells, and tumors with synthetic adhesins". ACS Synthetic Biology. 4 (4): 463-73. doi:10.1021/ ... 15 May 2019). "Total synthesis of Escherichia coli with a recoded genome". Nature. 569 (7757): 514-518. Bibcode:2019Natur.569.. ... 2005). ""Synthetic biology " engineering Escherichia coli to see light". Nature. 438 (7067): 441-442. Bibcode:2005Natur.438.. ...
This family consists of haemolysin expression modulating protein (Hha) from Escherichia coli and its enterobacterial homologues ... YmoA modulates the expression of various virulence factors, such as Yop proteins and YadA adhesin, in response to temperature. ...
... in Staphylococcus species and PGA in Escherichia coli. By degrading the biofilm matrix, Dispersin B allows for the release of ... Mack D, Fischer W, Krokotsch A, Leopold K, Hartmann R, Egge H, Laufs R (1996). "The intercellular adhesin involved in biofilm ... The three-dimensional structure of dispersin B was determined by expressing the protein in E. coli, purifying it from cultures ... and proteinaceous adhesins. It allows bacteria to adhere to host surfaces, protects the bacterial cells from host defenses, ...
Other commonly implicated bacteria include Streptococcus pyogenes, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella ... Bacterial virulence factors, such as glycocalyx and various adhesins, allow colonization, immune evasion, and establishment of ... The bacteria Streptococcus pneumoniae, Escherichia coli, Proteus spp., Pseudomonas aeruginosa, Staphylococcus aureus, ...
"Escherichia coli mediated urinary tract infections: are there distinct uropathogenic E. coli (UPEC) pathotypes?" (PDF). FEMS ... PapGI adhesins bind preferentially to globotriaosylceramide (GbO3), while the isoreceptors of PapGIV are unknown. E. coli ... Johanson IM, Plos K, Marklund BI, Svanborg C (August 1993). "Pap, papG and prsG DNA sequences in Escherichia coli from the ... Wullt B, Bergsten G, Samuelsson M, Svanborg C (June 2002). "The role of P fimbriae for Escherichia coli establishment and ...
Cookson, AL; Cooley, WA; Woodward, MJ (2002), "The role of type 1 and curli fimbriae of Shiga toxin-producing Escherichia coli ... They contain FimH adhesins at the "tips". The chaperone-usher pathway is responsible for moving many types of fimbriae out of ... Rice JC, Peng T, Spence JS, Wang HQ, Goldblum RM, Corthésy B, Nowicki BJ (December 2005). "Pyelonephritic Escherichia coli ... Perhaps the most well-studied is the F-pilus of Escherichia coli, encoded by the F sex factor. A sex pilus is typically 6 to 7 ...
Uropathogenic Escherichia coli (UPEC) is the major aetiological agent of Urinary Tract Infections (UTIs) and is often studied ... are non proteinaceous adhesins like Wall Teichoic acids (WTAs) and lipoteichoic acids. Since WTAs are required for host ... Pilicides inhibit the FGL chaperone/usher assisted biogenesis of thefimbrial polyadhesin from uropathogenic Escherichia coli. ...
The secreted molecules vary in size from the small Escherichia coli peptide colicin V, which is 10 kDa, to the Pseudomonas ... An example of autotransporter is the Trimeric Autotransporter Adhesins. Type VI secretion systems (T6SS) were discovered by the ... Crane JM, Randall LL (November 2017). "The Sec System: Protein Export in Escherichia coli". EcoSal Plus. 7 (2): ESP-0002-2017. ... "The twin arginine consensus motif of Tat signal peptides is involved in Sec-independent protein targeting in Escherichia coli ...
This is in contrast to another model organism, Escherichia coli, in which only 15% of its metabolic enzymes are essential. In ... The P1 adhesin (trypsin-sensitive protein) is a 120 kDa protein highly clustered on the surface of the attachment organelle tip ... This may be due to the fact that Mycoplasma pneumoniae's metabolome is less efficient than that of Escherichia coli. The ... Chowdhury S, Hepper S, Lodi MK, Saier MH, Uetz P (April 2021). "The Protein Interactome of Glycolysis in Escherichia coli". ...
Bedouelle, Hugues; Duplay, Pascale (Feb 1988). "Production in Escherichia coli and one-step purification of bifunctional hybrid ... through engineering a bacterial adhesin". Proceedings of the National Academy of Sciences. 109 (12): E690-7. Bibcode:2012PNAS.. ... The iCapTag™-target protein complex can be expressed in a wide range of expression hosts (e.g. CHO and E.coli cells). It is not ... Solubilization tags are used, especially for recombinant proteins expressed in species such as E. coli, to assist in the proper ...
CU) pili have clear relevance in the pathogenicity of uropathogenic Escherichia coli, where CU pili mediate bacterial tropism ... coli adhesin to its human kidney receptor". Cell. 105 (6): 733-43. doi:10.1016/S0092-8674(01)00388-9. PMID 11440716. S2CID ...
Winfield MD, Groisman EA (July 2003). "Role of nonhost environments in the lifestyles of Salmonella and Escherichia coli". ... In the study by Kisela et al., more pathogenic serovars of S. enterica were found to have certain adhesins in common that have ... in which they adhere to a host cell using bacterial adhesins and a type three-secretion system, Invasion, in which Salmonella ... "Evolution of Salmonella enterica virulence via point mutations in the fimbrial adhesin". PLOS Pathogens. 8 (6): e1002733. doi: ...
... is a virulence factor (adhesin) of EPEC (e.g. E. coli O127:H6) and EHEC (e.g. E. coli O157:H7) E. coli strains. It is ... "A cloned pathogenicity island from enteropathogenic Escherichia coli confers the attaching and effacing phenotype on E. coli K- ... Jerse AE, Yu J, Tall BD, Kaper JB (October 1990). "A genetic locus of enteropathogenic Escherichia coli necessary for the ... by intimin from enteropathogenic Escherichia coli". The EMBO Journal. 19 (11): 2452-64. doi:10.1093/emboj/19.11.2452. PMC ...
... coli proteins Esc: Escherichia secretion (component) Esp: Escherichia secretion protein Ces: Chaperone of E. coli secretion ... It needs to have a minimal length so that other extracellular bacterial structures (adhesins and the lipopolysaccharide layer, ... Escherichia coli (Gut flora, some strains cause food poisoning), Vibrio (gastroenteritis and diarrhea), Burkholderia (glanders ... coli adhesion". Journal of Microbiological Methods. 184: 106201. doi:10.1016/j.mimet.2021.106201. PMID 33713725. Kimura K, ...
A role in bacterial binding and sequestration is suggested by studies showing that Escherichia coli which express MS (mannose- ... "Structure of the decoy module of human glycoprotein 2 and uromodulin and its interaction with bacterial adhesin FimH". Nat. ...
5 prime ureB sRNA Aar small RNA, an sRNA produced by species of Acinetobacter Bacillus subtilis BSR sRNAs Escherichia coli sRNA ... Outer membrane proteins (OMPs) include porins and adhesins. Numerous sRNAs regulate the expression of OMPs. The porins OmpC and ... MicF in E. coli was found to regulate the expression of a key structural gene that makes up the outer membrane of the E. coli ... Hershberg R, Altuvia S, Margalit H (April 2003). "A survey of small RNA-encoding genes in Escherichia coli". Nucleic Acids ...
2001 Structural and sequence diversity of the pathogenicity island of uropathogenic Escherichia coli which encodes the USP ... Pathogenicity islands carry genes encoding one or more virulence factors, including, but not limited to, adhesins, secretion ... mosomal regions coding for fimbriae and hemolysins occur in vivo and in vitro in various extraintestinal Escherichia coli iso- ...
This mechanism has been described in bacteria such as Escherichia coli and Helicobacter pylori. Oxidative stress, nutrient ... with an increased number of adhesins participating in the interaction, making even harder the work for (PMN). The interaction ... Justice, Sheryl S.; Hunstad (2006). "Filamentation by Escherichia coli subverts innate defenses during urinary tract infection ... "The role of DNA base excision repair in filamentation in Escherichia coli K-12 adhered to epithelial HEp-2 cells". Antonie van ...
... is very similar to a homologous pair of proteins found in Escherichia coli (E. coli), though the reaction's speed is slower in ... When they come into contact with a new host cell, the elementary bodies bind to the cell via interaction between adhesins on ...
... putative adhesin-siderophore); bmaE (M fimbriae); gafD (G fimbriae); F17a (F17a fimbriae); clpG (CS31A adhesin); afaE8 ( ... Fluoroquinolone-resistant Escherichia coli, Indonesia Kuntaman Kuntaman*1, Endang Sri Lestari†1, Juliëtte A. Severin‡1, Irma M ... Box plot of relative mutation rate of 10 fluoroquinolone (FQ)-resistant (FQREC) and 10 FQ-sensitive (FQSEC) Escherichia coli. ... 3ExPEC: papEF (P fimbrial tip pilins); papG (P adhesin); papG alleles I, II, and III; sfaS (S fimbriae); focG (F1C fimbriae); ...
Anti-Escherichia coli adhesin activity of cranberry and blueberry juices. N Engl J Med 1991;324:1599. View abstract. ... Inhibition of the Adherence of P-Fimbriated Escherichia coli to Uroepithelial-Cell Surfaces by Proanthocyanidin Extracts from ...
7 23 4 0 Escherichia coli 6 14 8 0 Serratia sp. 5 0 0 1 Proteus sp. 3 11 15 1 Citrobacter sp. 1 0 2 0 Acinetobacter ... Bacterial adherence: adhesin-receptor interactions mediating the attachment of bacteria to mucosal surfaces. J Infect Dis 1981; ... Adherence of Streptococcus pyogenes, Escherichia coli, and Pseudomonas aeruginosa to fibronectin-coated and uncoated epithelial ... Escherichia coli, Serratia marcescens, and Proteus sp. comprised 50% of the isolates from cultures of respiratory tract ...
Categories: Adhesins, Escherichia coli Image Types: Photo, Illustrations, Video, Color, Black&White, PublicDomain, ...
... including Escherichia coli isolates from food production settings and clinical ESBL-producing E. coli isolates. Here, we ... coli isolates. Here, we describe the presence of two distinct LHR variants within a particularly heat resistant E. coli isolate ... The plasmid was highly transferable to other E. coli strains, including Shiga-toxin-producing strains, and conferred LHR- ... The plasmid was highly transferable to other E. coli strains, including Shiga-toxin-producing strains, and conferred LHR- ...
The effectiveness of anti-adhesin antibodies is illustrated by studies with FimH, the adhesin of uropathogenic Escherichia coli ... Schembri MA, Klemm P (May 1998). "Heterobinary adhesins based on the Escherichia coli FimH fimbrial protein". Appl. Environ. ... August 1999). "X-ray structure of the FimC-FimH chaperone-adhesin complex from uropathogenic Escherichia coli". Science. 285 ( ... October 2011). "Type 1 fimbrial adhesin FimH elicits an immune response that enhances cell adhesion of Escherichia coli". ...
Mannose-sensitive adhesins (usually type 1 fimbriae) are present on essentially all E coli. They contribute to colonization (eg ... Most bacterial data are derived from research with Escherichia coli, which accounts for 70-90% of uncomplicated UTIs and 21-54 ... A subset of E coli, the uropathogenic E coli (UPEC), also termed extraintestinal pathogenic E coli (ExPEC), accounts for most ... resistant Escherichia coli. Korean J Intern Med. 2016 Jan. 31 (1):145-55. [QxMD MEDLINE Link]. [Full Text]. ...
7 23 4 0 Escherichia coli 6 14 8 0 Serratia sp. 5 0 0 1 Proteus sp. 3 11 15 1 Citrobacter sp. 1 0 2 0 Acinetobacter ... Bacterial adherence: adhesin-receptor interactions mediating the attachment of bacteria to mucosal surfaces. J Infect Dis 1981; ... Adherence of Streptococcus pyogenes, Escherichia coli, and Pseudomonas aeruginosa to fibronectin-coated and uncoated epithelial ... Escherichia coli, Serratia marcescens, and Proteus sp. comprised 50% of the isolates from cultures of respiratory tract ...
One of these loci contained a gene encoding a putative autotransporter adhesin. The open reading frame of the gene spans a ... Due to the nucleotide sequence similarity of 98% to a recently published adhesin-related gene, located on plasmid pAPEC-O1- ... In accordance with this hypothesis, the adhesin was found to be present not only in different phylogenetic groups of ... A specific antibody was raised against this protein and expression of the adhesin was shown under laboratory conditions. ...
... coli adhesin (antigen 43) or by curli fibres. Furthermore, AI-2-dependent autoaggregation enhances bacterial stress resistance ... Autoinducer 2 (AI-2) is the only known quorum-sensing molecule produced by Escherichia coli but its physiological role remains ... but its role in Escherichia coli is unknown. Here, Laganenka et al. show that chemotaxis towards self-produced AI-2 mediates ... Here we show that chemotaxis towards self-produced AI-2 can mediate collective behaviour-autoaggregation-of E. coli. ...
The O75X adhesin of uropathogenic Escherichia coli: receptor-active domains in the canine urinary tract and in vitro ... The O75X adhesin of uropathogenic Escherichia coli is a type IV collagen-binding protein. Mol Microbiol. 3:329-337. Blackwell ... Molecular structure of adhesin domains in Escherichia coli fimbriae. Invited review. Int. J. Med. Microbiol. 295:479-486. ... The gaf gene cluster of Escherichia coli expresses a full-size and a truncated soluble adhesin protein. J. Bacteriol. 183:512- ...
Adhesins of Escherichia coli associated with extra-intestinal pathogenicity confer binding to colonic epithelial cells. ... P fimbriae and other adhesins enhance intestinal persistence of Escherichia coli in early infancy. ... Decreased expression of mannose-specific adhesins by Escherichia coli in the colonic microflora of immunoglobulin A-deficient ... Reduced phase switch capacity and functional adhesin expression of type 1-fimbriated Escherichia coli from immunoglobulin A- ...
Schembri, Mark A. and Klemm, Per (1998). Heterobinary adhesins based on the Escherichia coli FimH fimbrial protein. Applied and ... Fimbrial adhesins from extraintestinal Escherichia coli. Klemm, Per, Hancock, Viktoria and Schembri, Mark A. (2010). Fimbrial ... Valency conversion in the type 1 fimbrial adhesin of Escherichia coli. Sokurenko, E. V., Schembri, M. A., Trintchina, E., ... Molecular characterization of the Escherichia coli FimH adhesin. Schembri, M. A., Kjaergaard, K., Sokurenko, E. V. and Klemm, P ...
Superfamily b.2.3: Bacterial adhesins [49401] (7 families) *. Family b.2.3.5: F17c-type adhesin [89215] (3 proteins). ... Timeline for Species Escherichia coli [TaxId:562] from b.2.3.5 Fimbrial lectin GafD: *Species Escherichia coli [TaxId:562] from ... Species Escherichia coli [TaxId:562] from b.2.3.5 Fimbrial lectin GafD appears in SCOPe 2.05. *Species Escherichia coli [TaxId: ... PDB entry in Species: Escherichia coli [TaxId: 562]:. *Domain(s) for 1oio: *. Domain d1oioa_: 1oio A: [93069]. complexed with ...
PDB Description: gafd (f17c-type) fimbrial adhesin from escherichia coli. PDB Compounds: (A:) fimbrial lectin. SCOP Domain ... d1oioa_ b.2.3.5 (A:) Fimbrial lectin GafD {Escherichia coli [TaxId: 562]} ...
26 Schembri MA, Kjaergaard K, Sokurenko EV, Klemm P. Molecular characterization of the Escherichia coli FimH adhesin. J Infect ... Influence of berberine sulfate on synthesis and expression of pap fimbrial adhesin in uropathogenic Escherichia coli. ... Inhibition of uropathogenic Escherichia coli by cranberry juice: a new antiadherence assay. J Agric Food Chem 2005; 53: 8940- ... 23 Parkkinen J, Ristimäki A, Westerlund B. Binding of Escherichia coli S fimbriae to cultured human endothelial cells. Infect ...
Escherichia coli secreted protein B) from enterohaemorragic E. coli co-administered with a pegylated derivative of the TLR2/6 ... Adhesins, Bacterial * Adjuvants, Immunologic * Antibodies, Bacterial * Bacterial Outer Membrane Proteins * EaeB protein, E coli ... Escherichia coli secreted protein B) from enterohaemorragic E. coli co-administered with a pegylated derivative of the TLR2/6 ... Efficient immune responses against Intimin and EspB of enterohaemorragic Escherichia coli after intranasal vaccination using ...
... putative adhesin-siderophore); bmaE (M fimbriae); gafD (G fimbriae); F17a (F17a fimbriae); clpG (CS31A adhesin); afaE8 ( ... Fluoroquinolone-resistant Escherichia coli, Indonesia Kuntaman Kuntaman*1, Endang Sri Lestari†1, Juliëtte A. Severin‡1, Irma M ... Box plot of relative mutation rate of 10 fluoroquinolone (FQ)-resistant (FQREC) and 10 FQ-sensitive (FQSEC) Escherichia coli. ... 3ExPEC: papEF (P fimbrial tip pilins); papG (P adhesin); papG alleles I, II, and III; sfaS (S fimbriae); focG (F1C fimbriae); ...
... coli and Klebsiella pneumoniae revealed that most differences were clustered in four well defined regions. A PCR assay, based ... Escherichia coli MT78, an avian pathogenic strain of serogroup O2, produces a variant form of type 1 fimbriae with distinct ... Gyimah J. E., Panigrahy B. Adhesin-receptor interactions mediating the attachment of pathogenic Escherichia coli to chicken ... Krogfelt K. A. Bacterial adhesion: genetics, biogenesis, and role in pathogenesis of fimbrial adhesins of Escherichia coli. Rev ...
"The pgaABCD locus of Escherichia coli promotes the synthesis of a polysaccharide adhesin required for biofilm formation," ... by DNase I treatment of Gram-negative cells such as Pseudomonas aeruginosa and Escherichia coli, as well as Gram-positive cells ... D. Mack, W. Fischer, A. Krokotsch et al., "The intercellular adhesin involved in biofilm accumulation of Staphylococcus ... H. Rohde, E. C. Burandt, N. Siemssen et al., "Polysaccharide intercellular adhesin or protein factors in biofilm accumulation ...
An investigation of the expression and adhesin function of H7 flagella in the interaction of Escherichia coli O157:H7 with ... Temporal and spatial patterns of bovine Escherichia coli O157 prevalence and comparison of temporal changes in the patterns of ... Spread of E. coli O157 infection among Scottish cattle farms: Stochastic models and model selection. Epidemics. 2:11-20. ... phage types associated with bovine shedding and human E. coli O157 cases in Scotland between 1998-2000 and 2002-2004. BMC ...
Project - Anti-adhesins with therapeutic potential for enteroaggregative Escherichia coli diarrhoea. Iruka N Okeke is a ... Project - Anti-adhesins with therapeutic potential for enteroaggregative Escherichia coli diarrhoea. The relatively unknown and ... Escherichia coli and Klebsiella pneumoniae in pediatric and maternal populations within Uganda. ... understudied enteric pathogen enteroaggregative Escherichia coli (EAEC) is an important cause of infantile diarrhoea in Nigeria ...
... and antimicrobial resistance of uropathogenic Escherichia coli isolated from hospitalized patients in Thailand ... Distribution of phylogenetic groups, adhesin genes, biofilm formation, ...
Adhesins, Bacterial * Animals * Cattle * Escherichia coli K12 * Escherichia coli O157 * Escherichia coli Proteins ... Role of Escherichia coli O157:H7 virulence factors in colonization at the bovine terminal rectal mucosa Academic Article * Link ...
... are responsible for host diseases such as Neonatal Meningitis Escherichia coli (NMEC), the second-leading cause of neonatal ... Although OmpA is present in virtually all E. coli, differences in its amino acid residues have yet to be surveyed in ExPEC. ... bacterial meningitis, Avian Pathogenic E. coli (APEC), a cause of extraintestinal disease in poultry, and Uropathogenic E. coli ... of chromosomal history and polymorphism patterns in a virulence factor has precedence as polymorphisms in the adhesin FimH, a ...
Adhesins, Escherichia coli. publications Timeline , Most Recent This graph shows the total number of publications written about ... What is sometimes called polymeric adhesin (BIOFILMS) is distinct from protein adhesin. ... "Adhesins, Bacterial" by people in this website by year, and whether "Adhesins, Bacterial" was a major or minor topic of these ... "Adhesins, Bacterial" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ...
Adhesins, Escherichia coli. Thin, filamentous protein structures, including proteinaceous capsular antigens (fimbrial antigens ... ProtozoanAdhesins, Escherichia coliBase SequencePlasmodium vivaxAllelesHLA AntigensAntigens, Polyomavirus TransformingColonic ... ProtozoanAdhesins, Escherichia coliHLA AntigensAntigens, Polyomavirus TransformingAntibodiesRhamnoseAntigens, FungalAntigens, ... Ab113153 is a full length protein produced in Escherichia coli ... This protein is the basis of the ABO blood group system. The ...
Escherichia coli Adhesins 53% 6 Scopus citations * Photo-Induced Solution Deposition of Silver Nanoparticles on a Tb3+ Doped ... Molecular recognition of glyconanoparticles by RCA and E. coli K88 - Designing transports for targeted therapy. Gallegos- ...
Escherichia coli 68% * Escherichia coli Adhesins 55% * Hemagglutination 37% * Hemagglutinins 48% * Human Milk 13% ...
  • Enterotoxigenic Escherichia coli (ETEC) is closely associated with diarrhoea in children in resource-limited countries and of travellers' diarrhoea. (researchsquare.com)
  • Enterotoxigenic Escherichia coli (ETEC) is a major cause of diarrhoea in children in resource-limited countries and of travellers' diarrhoea 1 . (researchsquare.com)
  • Structural and functional insight into the carbohydrate receptor binding of F4 fimbriae-producing enterotoxigenic Escherichia coli. (ac.be)
  • Enterotoxigenic Escherichia coli (ETEC) strains are important causes of intestinal disease in humans and lead to severe production losses in animal farming. (ac.be)
  • Enterotoxigenic Escherichia coli (ETEC) expressing the colonization pili CFA/I are common causes of diarrhoeal infections in humans. (edu.sa)
  • F4-positive enterotoxigenic Escherichia coli (ETEC) strains are a frequent cause of porcine post-weaning diarrhea. (european-biotechnology.com)
  • The interactions between enterotoxigenic Escherichia coli (ETEC), the main pathogenic agent of travelers' diarrhea, intestinal mucus and human gut microbiota remain unknown. (nature.com)
  • However, our studies show we can obtain elevated Th2 cell (IL-4- and IL-13-dependent) immune responses, followed by a delayed onset of Th1 cells to colonization factor antigen I (CFA/I), from human enterotoxigenic Escherichia coli (ETEC). (ufl.edu)
  • Post-Weaning Diarrhea (PWD) due to Enterotoxigenic E. coli (ETEC) in pigs is a worldwide economically important disease associated with abnormal fecal consistency and higher use of antimicrobials. (biomedres.us)
  • Enterotoxigenic E. coli (ETEC) is regarded the most important cause of PWD. (biomedres.us)
  • Detection of Escherichia coli O157:H7 virulence genes in isolates from beef, pork, water, human and animal species in the northwest province, South Africa: Public health implications. (uptc.edu.co)
  • Molecular characteristics and genotypic diversity of enterohaemorrhagic Escherichia coli O157:H7 isolates in Gauteng region, South Africa. (uptc.edu.co)
  • Escherichia coli O157:H7 str. (weizmann.ac.il)
  • However, a sub-group of non-STEC have increasingly been associated with serious illness called Heamolytic Uremic Syndrome (kidney failure) that has hitherto being mainly restricted to the E. coli O157:H7 serotype. (chestervetclinic.com)
  • The E. coli O157:H7 then produces a protein called intimin (encoded by eae gene) and Tir (encoded by tir gene) that facilitates attachment to the epithelial cell surface. (chestervetclinic.com)
  • E. coli O157:H7 also forms a tube (Type III secretion system) to enable proteins to be transferred from the bacteria into the host. (chestervetclinic.com)
  • Although there are 25 proteins transferred from E. coli O157:H7 into the epithelial cell the most significant is the Shiga like toxin (encoded by stx gene). (chestervetclinic.com)
  • E. coli O157:H7 also produces a heamolysin that dissolves blood cells thereby contributing to the virulence of the pathogen. (chestervetclinic.com)
  • When E. coli O157:H7 cells are ingested, the infected person will start developing the common characteristics of foodborne illness such as fever, nausea, stomach cramps and diarrhea. (chestervetclinic.com)
  • Escherichia coli O157:H7 carried on plant surfaces, including alfalfa sprouts, has been implicated in food poisoning and outbreaks of disease in the United States. (utmb.edu)
  • Several E. coli O157:H7 surface proteins are thought to be important for adhesion and/or biofilm formation. (utmb.edu)
  • In contrast, deletion of one or more of these genes in a strain of E. coli O157:H7 did not affect its ability to bind to alfalfa. (utmb.edu)
  • In contrast, the E. coli O157:H7 ompA and tdcA ompA mutant strains were only slightly affected in adhesion to Caco-2 cells and during biofilm formation. (utmb.edu)
  • These findings suggest that some adhesins alone are sufficient to promote binding to alfalfa and that they may exist in E. coli O157:H7 as redundant systems, allowing it to compensate for the loss of one or more of these systems. (utmb.edu)
  • Gyimah J. E. , Panigrahy B. Adhesin-receptor interactions mediating the attachment of pathogenic Escherichia coli to chicken tracheal epithelium. (microbiologyresearch.org)
  • Sekizaki T. , Ito H. , Asawa T. , Nonomura I. DNA sequence of type 1 fimbrin, Fpull, gene from a chicken pathogenic Escherichia coli serotype O78. (microbiologyresearch.org)
  • Members of the Extraintestinal Pathogenic Escherichia coli (ExPEC) pathotype are adapted for an extraintestinal lifestyle. (biomedcentral.com)
  • Phenotypic and genotypic analysis of pathogenic Escherichia coli virulence genes recovered from Riyadh, Saudi Arabia. (uptc.edu.co)
  • This study aims to investigate the change of ileal mucosal microbiome and ileal protein expression as well as their correlation in pigs by E. coli K88 (ETEC). (researchsquare.com)
  • ETEC adheres to the intestinal epithelial cells (IEC) in the jejunum and ileum through adhesins interacting with specific receptors and secrets enterotoxins to cause perturbation of hydroelectrolytic secretions resulting in a rapid onset of secretory diarrhoea leading to dehydration 5 . (researchsquare.com)
  • A range of fimbrial adhesins in ETEC strains determines host and tissue tropism. (ac.be)
  • The ETEC pathotype is typically characterized by the presence of fimbrial adhesins, which mediate attachment to porcine intestinal enterocytes, and enterotoxins, which disrupt fluid homeostasis in the small intestine. (biomedres.us)
  • At the end of each fimbria are special proteins called adhesins. (web.app)
  • Recombinant CspA (rCspA) and CspB (rCspB) proteins were generated in Escherichia coli and used to produce pAbs. (microbiologyresearch.org)
  • Localized adherence by enteropathogenic escherichia coli is an inducible phenotype associated with the expression of new outer membrane proteins. (web.app)
  • Eiec are highly invasive, and they use adhesin proteins to bind to and enter intestinal cells. (web.app)
  • Although each family of adhesion proteins is generally associated with a specific human disease, the Dr family from Escherichia coli is a notable exception, as its members are associated with both diarrheal and urinary tract infections. (pasteur.fr)
  • Trimeric autotransporter adhesins (TAAs) are modular, highly repetitive surface proteins that mediate adhesion to host cells in a broad range of Gram-negative pathogens. (mpg.de)
  • Morgan Dasovich, Morgan Q. Beckett, Scott Bailey, Shao-En Ong, Marc M. Greenberg, and Anthony K. L. Leung (2021) Identifying Poly(ADP-ribose)-Binding Proteins with Photoaffinity-Based Proteomics. (jhu.edu)
  • We also mined a series of novel promising virulence-associated factors in our study compared with those in previous reports, such as some moonlighting adhesins, transporters, lipoate-protein ligase, and ribonuclease and several hypothetical proteins with conserved functional domains, deserving further research. (hindawi.com)
  • The plasmid was highly transferable to other E. coli strains, including Shiga-toxin-producing strains, and conferred LHR-dependent heat resistance as well as type 3 fimbriae-dependent biofilm formation capabilities. (frontiersin.org)
  • Most fimbria of gram-negative bacteria function as adhesins, but in many cases it is a minor subunit protein at the tip of the fimbriae that is the actual adhesin. (wikipedia.org)
  • The response regulator RcsB activates expression of Mat fimbriae in meningitic Escherichia coli . (helsinki.fi)
  • The fimbriae activator MatA switches off motility in Escherichia coli by repression of the flagellar master operon flhDC . (helsinki.fi)
  • Mat fimbriae promote biofilm formation by meningitis-associated Escherichia coli . (helsinki.fi)
  • 2009. The SfaX(II) protein from newborn meningitis E. coli is involved in regulation of motility and type 1 fimbriae expression. (helsinki.fi)
  • Escherichia coli MT78, an avian pathogenic strain of serogroup O2, produces a variant form of type 1 fimbriae with distinct antigenic properties and apparent mol. (microbiologyresearch.org)
  • Blomfield I. C. , McClain M. S. , Eisenstein B. I. Type 1 fimbriae mutants of Escherichia coli K12: characterization of recognized afimbriate strains and construction of new fim deletion mutants. (microbiologyresearch.org)
  • Most fimbriae (FIMBRIAE, BACTERIAL) of gram-negative bacteria function as adhesins, but in many cases it is a minor subunit protein at the tip of the fimbriae that is the actual adhesin. (jefferson.edu)
  • Flagella are long, helical filaments made of a single type of… The importance of p and type 1 fimbriae for the persistence of escherichia coli in the human gut volume 108 issue 3 k. tullus, i. kühn, i. (web.app)
  • Fimbriae are av B Wullt · 2001 · Citerat av 93 - Bacterial adhesion to the bladder mucosa is a critical step for the establishment of Escherichia coli bacteriuria. (web.app)
  • The specific type of adhesin varies by type of bacteria, but regardless of Fimbriae are a major bacterial virulence factor (something that helps a bacterium cause disease). (web.app)
  • Fimbriae, Bacterial Research Article Altered Regulation of the Diguanylate Cyclase YaiC Reduces Production of Type 1 Fimbriae in a Pst Mutant of Uropathogenic Escherichia coli CFT073 (a) Bacteria containing fimbriae are called fimbriate bacteria. (web.app)
  • A hemagglutination-based assay with E. coli expressing mutant F4ad fimbriae confirmed the elucidated co-complex structure. (ac.be)
  • Orally administered F4 fimbriae or FaeG, the major subunit and adhesin of F4, induce a protective mucosal immune response in F4 receptor-positive piglets. (european-biotechnology.com)
  • The genes with the highest circulation were Stx1, Stx2 coding for toxins, Saa for adhesins, ehxA for enterohemolysin , eaeA for intimin, and IpfA for fimbriae. (uptc.edu.co)
  • Huvudskillnad - APA vs Harvard Referensreferenser är en viktig aktivitet som bör vara exakt känd av akademiska forskare Skillnaden mellan Pili och Fimbriae. (web.app)
  • Published Biofilm formation is mediated by Csu pili, assembled via the "archaic" suggesting that archaic pili use tip-fingers to detect and bind to hydrophobic cavities in escherichia-coli, pilus, biogenesis, yersinia-pestis, psa fimbriae, adhesin, fimh, The shaft of the type 1 fimbriae regulates an external force to match the FimH catch pneumoniae-A Comparison between Helix‐like and Open Coil‐like Pili. (web.app)
  • Pili vs Fimbriae Pili en fimbriae staan bekend als filamenteuze aanhangsels, die voornamelijk worden gebruikt voor adhesie. (web.app)
  • De termen Pili en fimbriae Pili vs. (web.app)
  • Les mots pili et fimbriae sont souvent interchangeables, mais dans le domaine de la bactériologie, on appelle plutôt « fimbria » (fimbriae au pluriel) les pili de petite taille qui caractérisent de nombreuses bactéries (pili est le pluriel de pilus, qui en latin désigne le poil ou le cheveu). (web.app)
  • Other fimbriae such as F5 (K99), F6 (987P) and F41 rarely occur in E. coli isolates from PWD [9-13]. (biomedres.us)
  • A recently identified locus of heat resistance (LHR) has been shown to be present in and confer heat resistance to a variety of Enterobacteriaceae , including Escherichia coli isolates from food production settings and clinical ESBL-producing E. coli isolates. (frontiersin.org)
  • Identification of a Latin American-specific BabA adhesin variant through whole genome sequencing of Helicobacter pylori patient isolates from Nicaragua. (cdc.gov)
  • This study determined the frequency of diarrhoeagenic E. coli isolates collected from children with acute diarrhoea (n = 50) and a control group (n = 50) at an Iranian referral paediatric centre during a 1-year period. (who.int)
  • Characterization of AfaE adhesins produced by extraintestinal and intestinal human Escherichia coli isolates: PCR assays for detection of Afa adhesins that do or do not recognize Dr blood group antigens. (childrensmercy.org)
  • Genomic and phylogenetic characteristics of E. coli pneumonia isolates from critically ill patients indicate that they belong to the extraintestinal pathogenic E. coli pathovar but have distinguishable lung-specific traits. (cdc.gov)
  • we then hybridized isolates with DNA probes and identified enteropathogenic E. coli (EPEC), enteroaggregative E. coli (EAEC), and diffusely adherent E. coli (DAEC). (cdc.gov)
  • We conducted a case-control study on E. coli isolates that were categorized as EPEC, EAEC, and DAEC by adherence tests and DNA probing. (cdc.gov)
  • Whereas most genes were well conserved relative to fim genes previously described, comparison of the fimA gene from strain MT78 with homologous sequences from other strains of E. coli and Klebsiella pneumoniae revealed that most differences were clustered in four well defined regions. (microbiologyresearch.org)
  • In O104:H4 strains, the missing central portion of the LEE locus was replaced by a pathogenicity island carrying the aidA (adhesin involved in diffuse adherence) gene and antibiotic resistance genes commonly carried on plasmids. (pacb.com)
  • Enteroaggregative E. coli-specific virulence genes and European outbreak O104:H4-specific stx2-encoding Escherichia P13374 or Escherichia TL-2011c bacteriophages were missing in some of the O104:H4 genome sequences available from public databases. (pacb.com)
  • In the present work a new set of escherichia coli k12 genes conferring. (web.app)
  • Genes and expression of virulence factors in Escherichia coli isolated from production animals. (uptc.edu.co)
  • The present review aims to describe virulence factors and genes encoding them in E. coli strains isolated from production animals and food products. (uptc.edu.co)
  • Finally, E. coli has been the workhorse of molecular biology and provided a wealth of information on the function of genes and how these can be manipulated to produce valuable products such as insulin used to treat diabetes. (chestervetclinic.com)
  • Indeed, it is the acquisition of genes that gave rise to a sub-set of E. coli termed pathogenic E. coli . (chestervetclinic.com)
  • Escherichia coli harboring shiga toxin(s) genes collectively fall with the STEC group and encompasses over 200 different serotypes (Couturier et al. . (chestervetclinic.com)
  • Therefore, we examined whether mutations in several genes encoding potential adhesins and regulators of adherence have an effect on bacterial binding to plants and also examined the role of these genes during adhesion to Caco-2 cells and during biofilm formation on plastic in vitro. (utmb.edu)
  • The genes tested included those encoding adhesins (cah, aidA1, and ompA) and mediators of hyperadherence (tdcA,yidE, waaI, and cadA) and those associated with fimbria formation (csgA, csgD, and lpfD2). (utmb.edu)
  • The introduction of some of these genes (cah, aidA1, and csg loci) into an E. coli K-12 strain markedly increased its ability to bind to alfalfa sprouts and seed coats. (utmb.edu)
  • Two papers in Nature report synthetic biological circuits , a genetic toggle switch and a biological clock, by combining genes within E. coli cells. (biolaw.one)
  • Prevalence of urovirulence genes in Escherichia coli strains isolated from the feces of dogs (n = 61), their owners (61), and non-dog owners (30). (avma.org)
  • The quantitative level of resistance was >256 mg/L. PFGE showed a dominance of genotype A. PCR revealed more than half of the MRSA strains, while only 1/3 of the MSSA ones to possess four adhesin genes in various combinations. (otka-palyazat.hu)
  • The effectiveness of anti-adhesin antibodies is illustrated by studies with FimH, the adhesin of uropathogenic Escherichia coli (UPEC). (wikipedia.org)
  • Host‐specificity of uropathogenic Escherichia coli depends on differences in binding specificity to Gal alpha 1‐4Gal‐containing isoreceptors. (google.com.co)
  • Isolation of trna from uropathogenic escherichia coli. (web.app)
  • Inhibition of uropathogenic escherichia coli by cranberry. (web.app)
  • The aim of this study is that, extraction of trna from uropathogenic escherichia coli then detect the presence of such molecules after extraction and measure the purity of the trna extract solutions. (web.app)
  • Im Rahmen einer systematischen Untersuchung traditionell gegen UTI eingesetzter Arzneipflanzen wurde innerhalb einer In-vitro-Teilstudie untersucht, inwieweit solche Drogen potenzielle antiadhäsive Effekte gegenüber uropathogenen Escherichia coli (UPEC) und deren Erkennungs- und Anheftungsstrategien an humane Blasenzellen aufweisen. (thieme-connect.com)
  • Within a systematic project of medicinal plants, used traditionally against uncomplicated urinary tract infections (UTI), this study investigated anti-adhesive effects of plant extracts against uropathogenic E. coli (UPEC). (thieme-connect.com)
  • Extraintestinal Pathogenic E. coli (ExPEC), are responsible for host diseases such as Neonatal Meningitis Escherichia coli (NMEC), the second-leading cause of neonatal bacterial meningitis, Avian Pathogenic E. coli (APEC), a cause of extraintestinal disease in poultry, and Uropathogenic E. coli (UPEC), the most common cause of urinary tract infections. (biomedcentral.com)
  • With SadA from Salmonella enterica, EhaG from enteropathogenic Escherichia coli (EHEC), and UpaG from uropathogenic E. coli (UPEC), we present three representative structures of a complex adhesin that occur in a conserved genomic context in Enterobacteria and is essential in the infection process of uropathogenic E. coli. (mpg.de)
  • The E. coli uropathogenic strains (UPEC) are responsible for about 90% of uncomplicated cystitis. (infodeakos.com)
  • In gram-positive bacteria, a protein or polysaccharide surface layer serves as the specific adhesin. (wikipedia.org)
  • The bacterial adhesion consists primarily of an intramembranous structural protein which provides a scaffold upon which several extracellular adhesins may be attached. (wikipedia.org)
  • The phylogenetic trees were calculated with the Neighbor-Joining-Algorithm on the basis of a ClustalW multiple alignment of 24 protein sequences from known adhesins of the autotransporter family including AatA. (biomedcentral.com)
  • A major determinant of autoaggregation in E. coli is antigen 43 (Ag43), the abundant outer membrane protein that belongs to the autotransporter family and is secreted via the type V secretion system 4 . (nature.com)
  • Two distinct regions in the model protein Peb1 are critical for its heterologous transport out of Escherichia coli . (helsinki.fi)
  • Mucosal vaccine formulations based on purified recombinant C280 gamma-Intimin and EspB (Escherichia coli secreted protein B) from enterohaemorragic E. coli co-administered with a pegylated derivative of the TLR2/6 agonist MALP-2 (macrophage-activating lipopeptide) as adjuvant were evaluated in BALB/c mice. (nih.gov)
  • What is sometimes called polymeric adhesin (BIOFILMS) is distinct from protein adhesin. (jefferson.edu)
  • In an initial step, Mycobacterum tuberculosis (Mtb) binds alveolar MOs through mycobacterial adhesins or opsonins that interact with a variety of receptors, including CR1, CR3, and CR4, IgGFc, surfactant A protein and C-type lectins [ 3 ]. (biomedcentral.com)
  • A Protein Synthesis in Prokaryotes: The mechanism of protein synthesis has been thoroughly investigated in Escherichia coli. (speedweb.shop)
  • The process of protein synthesis in E. coli involves the following steps: 1. (speedweb.shop)
  • Current work has adapted the rodent EAE model to test whether our tolerogen vaccine delivery platform, the reovirus adhesin, protein sigma 1 (pσ1), can improve mucosal auto-antigen uptake. (ufl.edu)
  • It consists of a thick peptidoglycan layer, teichoic acid, protein-A, and cell surface adhesins (e.g. clumping factor). (notesmed.com)
  • protein_coding" "AAC73318","yafS","Escherichia coli","putative S-adenosyl-L-methionine-dependent methyltransferase [Ensembl]. (ntu.edu.sg)
  • protein_coding" "AAC73721","dpiA","Escherichia coli","response regulator in two-component regulatory system with CitA [Ensembl]. (ntu.edu.sg)
  • protein_coding" "AAC74828","ynjF","Escherichia coli","CDP-alcohol phosphatidyltransferase family inner membrane protein [Ensembl]. (ntu.edu.sg)
  • Recombinant protein production was carried out with E. coli BL21 (DE3) as the host [61]. (pdgfrsignals.com)
  • According to the source of the infection, pathogenic E. coli can be classified as intestinal (diarrheagenic) and extraintestinal (ExPEC). (opensourcebiology.eu)
  • When E. coli O157 is ingested it can survive the acid of the stomach and eventually reaches the colon where it binds to a receptor on the epithelial cells of the gastro-intestinal tract. (chestervetclinic.com)
  • Several alternative strategies have been explored to increase intestinal health and decrease incidence of PWD due to E. coli in post-weaned piglets [21-23]. (biomedres.us)
  • The initial step of numerous prokaryotic and viral infections consists in the binding of adhesins of pathogens and toxins secreted by bacteria to the cell surface of susceptible target cells of the host, whereupon the actual disease is triggered. (internet1.de)
  • The mechanisms of evasion from host immunity and action of adhesins, toxins and other virulence factors are analyzed in detail using prototypic examples of human and animal pathogens. (vscht.cz)
  • Autoinducer 2 (AI-2) is the only known quorum-sensing molecule produced by Escherichia coli but its physiological role remains elusive, although it is known to regulate biofilm formation and virulence in other bacterial species. (nature.com)
  • The Gram-negative bacterium Escherichia coli is one of the model organisms for studying both cell aggregation and biofilm formation. (nature.com)
  • in biofilm development lead to the finding that conjugative pili might act as cell adhesin interconnecting and stabilizing biofilm structure. (kenyon.edu)
  • Second, deleting all innate determinants of biofilm formation, including cell surface structures and displaying artificial adhesins (e.g. nanobodies) on the envelope of the resulting naked strain. (vdl-lab.com)
  • The gene icaADBC has been found to code for both the polysaccharide capsule and the polysaccharide intracellular adhesin used in biofilm formation. (joerggraflab.com)
  • LapG mediates biofilm dispersal in Vibrio fischeri by controlling maintenance of the VCBS-containing adhesin LapV. (luc.edu)
  • The best characterized bacterial adhesin is the type 1 fimbrial FimH adhesin. (wikipedia.org)
  • Pdf characterization of colicinogenic escherichia coli. (web.app)
  • Suwanichkul A. , Panigrahy B. , Wagner R. M. Antigenic relatedness and partial amino acid sequences of pili of Escherichia coli serotypes 01, 02, and 078 pathogenic to poultry. (microbiologyresearch.org)
  • Hull R. A. , Gill R. E. , Hsu P. , Minshew B. H. , Falkow S. Construction and expression of recombinant plasmids encoding type 1 or D-mannose-resistant pili from a urinary tract infection Escherichia coli isolate. (microbiologyresearch.org)
  • RESULT: We observed staining of endometrial glands, spiral arterioles, and myometrial arteries with Dr adhesin (pili) and anti-DAF (SCR-3) IgG, and found variation in distribution and amount of Dr ligands in different individuals. (okstate.edu)
  • The gene product encoded by AidA, an auto-secreted putative adhesin, has been found to be up-regulated during infection, using a gene discovery method known as In-vivo Induced Antigen Technology (IVIAT). (uwyo.edu)
  • 3 Edén CS, Leffler H. Glycosphingolipids of human urinary tract epithelial cells as possible receptors for adhering Escherichia coli bacteria . (thieme-connect.com)
  • For example, E. coli utilizes them to get attached to the mannose receptors. (web.app)
  • Enteroaggregative escherichia coli eaec is a heterogeneous emerging enteric pathogen identified during the 1980s when eaec strains were isolated from cases of acute and persistent diarrhea among infants in developing countries as well as travelers diarrhea. (web.app)
  • patients and controls did not differ in the rate of isolation of diffusely adhering E. coli (DAEC) (31% and 32%, respectively) or enteroaggregative E. coli (EAEC) (10% and 8%, respectively). (cdc.gov)
  • ABSTRACT Diarrhoeagenic Escherichia coli can be considered as the most important etiologic agents of diarrhoea in the Islamic Republic of Iran, particularly in children. (who.int)
  • Escherichia coli and how the O104:H4 serotype has changed our understanding of pathogenicity of E. coli . (chestervetclinic.com)
  • Adhesins are cell-surface components or appendages of bacteria that facilitate adhesion or adherence to other cells or to surfaces, usually in the host they are infecting or living in. (wikipedia.org)
  • To effectively achieve adherence to host surfaces, many bacteria produce multiple adherence factors called adhesins. (wikipedia.org)
  • HEp-2-adherent Escherichia coli strains that show localized adherence (LA), aggregative adherence (AA), diffuse adherence (DA), and localized adherence-like (LAL) patterns have been implicated as diarrheal pathogens (1) . (cdc.gov)
  • Adhesive polypeptides of Staphylococcus aureus identified using a novel secretion library technique in Escherichia coli . (helsinki.fi)
  • Dairy cows often develop different degrees of endometritis after calving and this is attributed to pathogenic bacterial infections such as by Escherichia coli and Staphylococcus aureus . (biomedcentral.com)
  • The results of UV-visible and energy-dispersive spectrometry confirmed their important carbon polymerization structures and the activity of the nitro group, which had an evident inhibitory effect on P. gingivalis , but almost no effect on other bacteria, including Escherichia coli , Staphylococcus aureus and Prevotella nigrescens . (dovepress.com)
  • However, it has still to be shown in practice that the vaccine that fights of pathogenic E.coli bacteria is effective and safe and can help to fight the global health threat of antimicrobial resistance (AMR). (european-biotechnology.com)
  • Virulence determinants and antimicrobial resistance of E. coli isolated from bovine clinical mastitis in some selected dairy farms of Bangladesh. (uptc.edu.co)
  • The disease is currently controlled using antimicrobials, although the emergence of antimicrobial resistance in E. coli strains isolated from cases of PWD urges the need for alternative control measures [14-18]. (biomedres.us)
  • These effects are observed regardless whether cell-cell interactions under particular growth conditions are mediated by the major E. coli adhesin (antigen 43) or by curli fibres. (nature.com)
  • by immunoblot, it was found that the plasma membranes of phosphate-deprived bacilli express the adhesins PstS-1, LpqH, LprG, and the APA antigen. (biomedcentral.com)
  • we found that together with PstS-1, the membranes of Pi-deprived mycobacteria express the mycobacterial adhesins LpqH, LprG, and the APA antigen, glycoproteins that are not directly involved in phosphate regulation. (biomedcentral.com)
  • The intimin (eae) gene, involved in the attaching-effacing phenotype of diarrheagenic E. coli, was not found in either strain. (pacb.com)
  • A hypothesis on strain evolution and pathogenic potential of various H-serotypes of E. coli O104 strains is proposed. (pacb.com)
  • The E. coli strain DH5α was used as a standard cloning host [59]. (pdgfrsignals.com)
  • 4b4p (Br: 13) - Crystal Structure of the Lectin Domain of F18 Fimbrial Adhesin Fedf. (atomistry.com)
  • Many bacterial pathogens are able to express an array of different adhesins. (wikipedia.org)
  • For example, E. coli produces Vitamin K that we use as part of cell repair (blood clotting) and are far more effective probiotics than lactic acid bacteria in out-competing would be pathogens such as Salmonella and Clostridium difficile . (chestervetclinic.com)
  • Its presence indicates the potential presence of virulent pathogens such as Salmonella , E. coli O157 and Shigella , amongst others. (chestervetclinic.com)
  • Expression of these adhesins at different phases during infection play the most important role in adhesion based virulence. (wikipedia.org)
  • This has led to the exploration of adhesin activity interruption as a method of bacterial infection treatment. (wikipedia.org)
  • Additionally, Adhesins are attractive vaccine candidates because they are often essential to infection and are surface-located, making them readily accessible to antibodies. (wikipedia.org)
  • Enteroinvasive escherichia coli eiec is a type of pathogenic bacteria whose infection causes a syndrome that is identical to shigellosis, with profuse diarrhea and high fever. (web.app)
  • Infection of the bovine en. (biomedcentral.com)
  • Bacterial adhesins provide species and tissue tropism. (wikipedia.org)
  • Prevalence and virulence gene profiles of Escherichia coli O157 from cattle slaughtered in Buea, Cameroon. (uptc.edu.co)
  • In a prospective, nationwide study in France of Escherichia coli responsible for pneumonia in patients receiving mechanical ventilation, we determined E. coli antimicrobial susceptibility, phylotype, O-type, and virulence factor gene content. (cdc.gov)
  • Predictability of phenotype in relation to common β-lactam resistance mechanisms in Escherichia coli and Klebsiella pneumoniae. (cdc.gov)
  • 4 'Suzuki, A.' 5 'Linke, D.' 6 'Lupas, A.N.' 7 'Hori, K.' 8 # _citation.id primary _citation.title ;Structural Basis for Toughness and Flexibility in the C-terminal Passenger Domain of an Acinetobacter Trimeric Autotransporter Adhesin. (rcsb.org)
  • Neely MN, Dell CL, Olson ER: Roles of LysP and CadC in mediating the lysine requirement for acid induction of the Escherichia coli cad operon. (cetp-signal.com)
  • Jacob and Monod postulate cellular regulation by molecular networks from their study of the lac operon in E. coli and envisioned the ability to assemble new systems from molecular components. (biolaw.one)
  • Phylogenetic Group -Associated Differences in Regulation of the Common Colonization Factor Mat Fimbria in Escherichia coli . (helsinki.fi)
  • According to the World Health Organization, Enterobacteriaceae , including Escherichia coli , are among the critical priority antibiotic-resistant bacteria ( 7 ). (cdc.gov)
  • Adhesion and bacterial adhesins are also a potential target for prophylaxis or treatment of bacterial infections. (wikipedia.org)
  • This adhesin is responsible for D-mannose sensitive adhesion. (wikipedia.org)
  • This basic structure is conserved across type 1 fimbrial adhesins though recent studies have shown that in vitro induced mutations can lead to the addition of C-terminal domain specificity resulting in a bacterial adhesion with dual bending sites and related binding phenotypes. (wikipedia.org)
  • Although their sizes may differ by more than one order of magnitude, they all follow the same basic head-stalk-anchor architecture, where the head mediates adhesion and autoagglutination, the stalk projects the head from the bacterial surface, and the anchor provides the export function and attaches the adhesin to the bacterial outer membrane after export is complete. (mpg.de)
  • Moreover, the fungal adhesins playing a role in adhesion to host have been only explored in yeasts. (pasteur.fr)
  • Genome sequencing and comparative genomics provides insights on the evolutionary dynamics and pathogenic potential of different H-serotypes of Shiga toxin-producing Escherichia coli O104. (pacb.com)
  • Various H-serotypes of the Shiga toxin-producing Escherichia coli (STEC) O104, including H4, H7, H21, and H¯, have been associated with sporadic cases of illness and have caused food-borne outbreaks globally. (pacb.com)
  • The outbreak of Shiga Toxin producing Escherichia coli O104:H4 linked to bean sprouts led to over 3800 confirmed cases of illness that included more than 823 cases of Heamolytic Uremic Syndrome (HUS) and 44 deaths (Frank et al . (chestervetclinic.com)
  • Bruni CB, Colantuoni V, Sbordone L, Cortese R, Blasi F: Biochemical and regulatory properties of Escherichia coli K-12 hisT mutants. (cetp-signal.com)
  • Researchers report the production of a new synthetic (possibly artificial ) form of viable life , a variant of the bacteria Escherichia coli , by reducing the natural number of 64 codons in the bacterial genome to 59 codons instead, in order to encode 20 amino acids . (biolaw.one)
  • Although OmpA is present in virtually all E. coli , differences in its amino acid residues have yet to be surveyed in ExPEC. (biomedcentral.com)
  • Stubbs HE , Bensing BA , Yamakawa I , Sharma P , Yu H , Chen X , Sullam PM , Iverson TM , Tandem sialoglycan-binding modules in a Streptococcus sanguinis serine-rich repeat adhesin create target dependent avidity effects Journal of Biological Chemistry. (vanderbilt.edu)
  • Numerous studies have shown that inhibiting a single adhesin in this coordinated effort can often be enough to make a pathogenic bacterium non-virulent. (wikipedia.org)
  • One of the main features that makes E. coli easy to manipulate in genetic engineering is the ease with which genetic material can be introduced and alter the physiological traits of the bacterium. (chestervetclinic.com)
  • Dho-Moulin M. , van den Bosch J. F. , Girardeau J. P. , Bree A. , Lafont J. P. Surface antigens from Escherichia coli 02 and 078 strains of avian origin. (microbiologyresearch.org)
  • Escherichia coli , # Neisseria meningitidis , ° Haemophilus influenzae , + Yersinia enterocolitica , ' Moraxella catarrhalis , ´´ Helicobacter pylori , $ Xylella fastidiosa , ** Salmonella Typhimurium, and & Bordetella pertussis . (biomedcentral.com)