A group II chaperonin found in eukaryotic CYTOSOL. It is comprised of eight subunits with each subunit encoded by a separate gene. This chaperonin is named after one of its subunits which is a T-COMPLEX REGION-encoded polypeptide.
A group I chaperonin protein that forms a lid-like structure which encloses the non-polar cavity of the chaperonin complex. The protein was originally studied in BACTERIA where it is commonly referred to as GroES protein.
A group I chaperonin protein that forms the barrel-like structure of the chaperonin complex. It is an oligomeric protein with a distinctive structure of fourteen subunits, arranged in two rings of seven subunits each. The protein was originally studied in BACTERIA where it is commonly referred to as GroEL protein.
A family of multisubunit protein complexes that form into large cylindrical structures which bind to and encapsulate non-native proteins. Chaperonins utilize the energy of ATP hydrolysis to enhance the efficiency of PROTEIN FOLDING reactions and thereby help proteins reach their functional conformation. The family of chaperonins is split into GROUP I CHAPERONINS, and GROUP II CHAPERONINS, with each group having its own repertoire of protein subunits and subcellular preferences.
A subcategory of chaperonins found in ARCHAEA and the CYTOSOL of eukaryotic cells. Group II chaperonins form a barrel-shaped macromolecular structure that is distinct from GROUP I CHAPERONINS in that it does not utilize a separate lid like structure to enclose proteins.
An enzyme that catalyzes the active transport system of sodium and potassium ions across the cell wall. Sodium and potassium ions are closely coupled with membrane ATPase which undergoes phosphorylation and dephosphorylation, thereby providing energy for transport of these ions against concentration gradients.
An enzyme that catalyzes the transfer of the planetary sulfur atom of thiosulfate ion to cyanide ion to form thiocyanate ion. EC 2.8.1.1.
A 20 cM region of mouse chromosome 17 that is represented by a least two HAPLOTYPES. One of the haplotypes is referred to as the t-haplotype and contains an unusual array of mutations that affect embryonic development and male fertility. The t-haplotype is maintained in the gene pool by the presence of unusual features that prevent its recombination.
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.
Processes involved in the formation of TERTIARY PROTEIN STRUCTURE.
Group II chaperonins found in species of ARCHAEA.
A subcategory of chaperonins found in MITOCHONDRIA; CHLOROPLASTS; and BACTERIA. Group I chaperonins form into a barrel-shaped macromolecular structure that is enclosed by a separate lid-like protein component.
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.
Multisubunit enzymes that reversibly synthesize ADENOSINE TRIPHOSPHATE. They are coupled to the transport of protons across a membrane.
Cation-transporting proteins that utilize the energy of ATP hydrolysis for the transport of CALCIUM. They differ from CALCIUM CHANNELS which allow calcium to pass through a membrane without the use of energy.
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.
An enzyme that catalyzes the conversion of (S)-malate and NAD+ to oxaloacetate and NADH. EC 1.1.1.37.
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.
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).
The process of cleaving a chemical compound by the addition of a molecule of water.
A group of irregular rod-shaped bacteria that stain gram-positive and do not produce endospores.
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.
Proteins found in any species of archaeon.
A family of cellular proteins that mediate the correct assembly or disassembly of polypeptides and their associated ligands. Although they take part in the assembly process, molecular chaperones are not components of the final structures.
The rate dynamics in chemical or physical systems.
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.
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.
Conformational transitions of a protein from unfolded states to a more folded state.
Adenosine 5'-(trihydrogen diphosphate). An adenine nucleotide containing two phosphate groups esterified to the sugar moiety at the 5'-position.
Single chains of amino acids that are the units of multimeric PROTEINS. Multimeric proteins can be composed of identical or non-identical subunits. One or more monomeric subunits may compose a protomer which itself is a subunit structure of a larger assembly.
A carboxy-lyase that plays a key role in photosynthetic carbon assimilation in the CALVIN-BENSON CYCLE by catalyzing the formation of 3-phosphoglycerate from ribulose 1,5-biphosphate and CARBON DIOXIDE. It can also utilize OXYGEN as a substrate to catalyze the synthesis of 2-phosphoglycolate and 3-phosphoglycerate in a process referred to as photorespiration.
A genus of anaerobic coccoid METHANOCOCCACEAE whose organisms are motile by means of polar tufts of flagella. These methanogens are found in salt marshes, marine and estuarine sediments, and the intestinal tract of animals.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
A genus of extremely thermophilic heterotrophic archaea, in the family THERMOCOCCACEAE, occurring in heated sea flows. They are anaerobic chemoorganotropic sulfidogens.
Disruption of the non-covalent bonds and/or disulfide bonds responsible for maintaining the three-dimensional shape and activity of the native protein.
5'-Adenylic acid, monoanhydride with imidodiphosphoric acid. An analog of ATP, in which the oxygen atom bridging the beta to the gamma phosphate is replaced by a nitrogen atom. It is a potent competitive inhibitor of soluble and membrane-bound mitochondrial ATPase and also inhibits ATP-dependent reactions of oxidative phosphorylation.
Proteins found in any species of bacterium.
Proton-translocating ATPases that are involved in acidification of a variety of intracellular compartments.
A genus of aerobic, chemolithotrophic, coccoid ARCHAEA whose organisms are thermoacidophilic. Its cells are highly irregular in shape, often lobed, but occasionally spherical. It has worldwide distribution with organisms isolated from hot acidic soils and water. Sulfur is used as an energy source.
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.
Electron microscopy involving rapid freezing of the samples. The imaging of frozen-hydrated molecules and organelles permits the best possible resolution closest to the living state, free of chemical fixatives or stains.
The degree of similarity between sequences of amino acids. This information is useful for the analyzing genetic relatedness of proteins and species.
Proteins prepared by recombinant DNA technology.
The parts of a macromolecule that directly participate in its specific combination with another molecule.
A network of tubules and sacs in the cytoplasm of SKELETAL MUSCLE FIBERS that assist with muscle contraction and relaxation by releasing and storing calcium ions.
A cardioactive glycoside consisting of rhamnose and ouabagenin, obtained from the seeds of Strophanthus gratus and other plants of the Apocynaceae; used like DIGITALIS. It is commonly used in cell biological studies as an inhibitor of the NA(+)-K(+)-EXCHANGING ATPASE.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.
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.
The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.
The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.
Cells of the higher organisms, containing a true nucleus bounded by a nuclear membrane.
A species of the genus SACCHAROMYCES, family Saccharomycetaceae, order Saccharomycetales, known as "baker's" or "brewer's" yeast. The dried form is used as a dietary supplement.
Proteins obtained from ESCHERICHIA COLI.
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.
A metallic element that has the atomic symbol Mg, atomic number 12, and atomic weight 24.31. It is important for the activity of many enzymes, especially those involved in OXIDATIVE PHOSPHORYLATION.
Filamentous proteins that are the main constituent of the thin filaments of muscle fibers. The filaments (known also as filamentous or F-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. This is known as globular or G-actin. In conjunction with MYOSINS, actin is responsible for the contraction and relaxation of muscle.
A microtubule subunit protein found in large quantities in mammalian brain. It has also been isolated from SPERM FLAGELLUM; CILIA; and other sources. Structurally, the protein is a dimer with a molecular weight of approximately 120,000 and a sedimentation coefficient of 5.8S. It binds to COLCHICINE; VINCRISTINE; and VINBLASTINE.
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.
A species of gram-negative, aerobic, rod-shaped bacteria found in hot springs of neutral to alkaline pH, as well as in hot-water heaters.
One of the three domains of life (the others being BACTERIA and Eukarya), formerly called Archaebacteria under the taxon Bacteria, but now considered separate and distinct. They are characterized by: (1) the presence of characteristic tRNAs and ribosomal RNAs; (2) the absence of peptidoglycan cell walls; (3) the presence of ether-linked lipids built from branched-chain subunits; and (4) their occurrence in unusual habitats. While archaea resemble bacteria in morphology and genomic organization, they resemble eukarya in their method of genomic replication. The domain contains at least four kingdoms: CRENARCHAEOTA; EURYARCHAEOTA; NANOARCHAEOTA; and KORARCHAEOTA.
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.
Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed)
Measurement of the intensity and quality of fluorescence.
A zinc-containing enzyme which oxidizes primary and secondary alcohols or hemiacetals in the presence of NAD. In alcoholic fermentation, it catalyzes the final step of reducing an aldehyde to an alcohol in the presence of NADH and hydrogen.
A basic element found in nearly all organized tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.
An NAD+ dependent enzyme that catalyzes the oxidation of 3-carboxy-2-hydroxy-4-methylpentanoate to 3-carboxy-4-methyl-2-oxopentanoate. It is involved in the biosynthesis of VALINE; LEUCINE; and ISOLEUCINE.
The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells.
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.
Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.
Calcium-transporting ATPases that catalyze the active transport of CALCIUM into the SARCOPLASMIC RETICULUM vesicles from the CYTOPLASM. They are primarily found in MUSCLE CELLS and play a role in the relaxation of MUSCLES.
A class of MOLECULAR CHAPERONES found in both prokaryotes and in several compartments of eukaryotic cells. These proteins can interact with polypeptides during a variety of assembly processes in such a way as to prevent the formation of nonfunctional structures.
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)
A carbodiimide that is used as a chemical intermediate and coupling agent in peptide synthesis. (From Hawley's Condensed Chemical Dictionary, 12th ed)
Oxyvanadium ions in various states of oxidation. They act primarily as ion transport inhibitors due to their inhibition of Na(+)-, K(+)-, and Ca(+)-ATPase transport systems. They also have insulin-like action, positive inotropic action on cardiac ventricular muscle, and other metabolic effects.
The reconstitution of a protein's activity following denaturation.
Enzyme that catalyzes the first step of the tricarboxylic acid cycle (CITRIC ACID CYCLE). It catalyzes the reaction of oxaloacetate and acetyl CoA to form citrate and coenzyme A. This enzyme was formerly listed as EC 4.1.3.7.
A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.
Macromolecular complexes formed from the association of defined protein subunits.
A genus of anaerobic, chemolithotropic coccoid ARCHAEA, in the family DESULFUROCOCCACEAE. They live in marine environments.
An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
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.
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 class of organic compounds which contain an anilino (phenylamino) group linked to a salt or ester of naphthalenesulfonic acid. They are frequently used as fluorescent dyes and sulfhydryl reagents.
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.
Intracellular fluid from the cytoplasm after removal of ORGANELLES and other insoluble cytoplasmic components.
A sulfhydryl reagent that is widely used in experimental biochemical studies.
Reagents with two reactive groups, usually at opposite ends of the molecule, that are capable of reacting with and thereby forming bridges between side chains of amino acids in proteins; the locations of naturally reactive areas within proteins can thereby be identified; may also be used for other macromolecules, like glycoproteins, nucleic acids, or other.
A diverse superfamily of proteins that function as translocating proteins. They share the common characteristics of being able to bind ACTINS and hydrolyze MgATP. Myosins generally consist of heavy chains which are involved in locomotion, and light chains which are involved in regulation. Within the structure of myosin heavy chain are three domains: the head, the neck and the tail. The head region of the heavy chain contains the actin binding domain and MgATPase domain which provides energy for locomotion. The neck region is involved in binding the light-chains. The tail region provides the anchoring point that maintains the position of the heavy chain. The superfamily of myosins is organized into structural classes based upon the type and arrangement of the subunits they contain.
A set of opposing, nonequilibrium reactions catalyzed by different enzymes which act simultaneously, with at least one of the reactions driven by ATP hydrolysis. The results of the cycle are that ATP energy is depleted, heat is produced and no net substrate-to-product conversion is achieved. Examples of substrate cycling are cycling of gluconeogenesis and glycolysis pathways and cycling of the triglycerides and fatty acid pathways. Rates of substrate cycling may be increased many-fold in association with hypermetabolic states resulting from severe burns, cold exposure, hyperthyroidism, or acute exercise.
A genus of anaerobic, rod-shaped METHANOBACTERIACEAE. Its organisms are nonmotile and use ammonia as the sole source of nitrogen. These methanogens are found in aquatic sediments, soil, sewage, and the gastrointestinal tract of animals.
Plant cell inclusion bodies that contain the photosynthetic pigment CHLOROPHYLL, which is associated with the membrane of THYLAKOIDS. Chloroplasts occur in cells of leaves and young stems of plants. They are also found in some forms of PHYTOPLANKTON such as HAPTOPHYTA; DINOFLAGELLATES; DIATOMS; and CRYPTOPHYTA.
A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.
A strong organic base existing primarily as guanidium ions at physiological pH. It is found in the urine as a normal product of protein metabolism. It is also used in laboratory research as a protein denaturant. (From Martindale, the Extra Pharmacopoeia, 30th ed and Merck Index, 12th ed) It is also used in the treatment of myasthenia and as a fluorescent probe in HPLC.
The characteristic 3-dimensional shape and arrangement of multimeric proteins (aggregates of more than one polypeptide chain).
High molecular weight proteins found in the MICROTUBULES of the cytoskeletal system. Under certain conditions they are required for TUBULIN assembly into the microtubules and stabilize the assembled microtubules.
The monomeric units from which DNA or RNA polymers are constructed. They consist of a purine or pyrimidine base, a pentose sugar, and a phosphate group. (From King & Stansfield, A Dictionary of Genetics, 4th ed)
The sum of the weight of all the atoms in a molecule.
Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.
Genetically engineered MUTAGENESIS at a specific site in the DNA molecule that introduces a base substitution, or an insertion or deletion.
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.
The mitochondria of the myocardium.
The modification of the reactivity of ENZYMES by the binding of effectors to sites (ALLOSTERIC SITES) on the enzymes other than the substrate BINDING SITES.
Any spaces or cavities within a cell. They may function in digestion, storage, secretion, or excretion.
A genus of facultatively anaerobic heterotrophic archaea, in the order THERMOPLASMALES, isolated from self-heating coal refuse piles and acid hot springs. They are thermophilic and can grow both with and without sulfur.
A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.
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).
Conversion of an inactive form of an enzyme to one possessing metabolic activity. It includes 1, activation by ions (activators); 2, activation by cofactors (coenzymes); and 3, conversion of an enzyme precursor (proenzyme or zymogen) to an active enzyme.
A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)
Calcium-transporting ATPases found on the PLASMA MEMBRANE that catalyze the active transport of CALCIUM from the CYTOPLASM into the extracellular space. They play a role in maintaining a CALCIUM gradient across plasma membrane.
Separation technique in which the stationary phase consists of ion exchange resins. The resins contain loosely held small ions that easily exchange places with other small ions of like charge present in solutions washed over the resins.
An enzyme that catalyzes the hydrolysis of nitrophenyl phosphates to nitrophenols. At acid pH it is probably ACID PHOSPHATASE (EC 3.1.3.2); at alkaline pH it is probably ALKALINE PHOSPHATASE (EC 3.1.3.1). EC 3.1.3.41.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
A metallic element with the atomic symbol V, atomic number 23, and atomic weight 50.94. It is used in the manufacture of vanadium steel. Prolonged exposure can lead to chronic intoxication caused by absorption usually via the lungs.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
An enzyme that catalyzes the hydrolysis of keratin, and of other proteins with subtilisin-like specificity. It hydrolyses peptide amides. Endopeptidase K is from the mold Tritirachium album Limber. (Enzyme Nomenclature, 1992) EC 3.4.21.64.
Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques.
An enzyme of the oxidoreductase class that catalyzes the reaction 7,8-dihyrofolate and NADPH to yield 5,6,7,8-tetrahydrofolate and NADPH+, producing reduced folate for amino acid metabolism, purine ring synthesis, and the formation of deoxythymidine monophosphate. Methotrexate and other folic acid antagonists used as chemotherapeutic drugs act by inhibiting this enzyme. (Dorland, 27th ed) EC 1.5.1.3.
An enzyme of the oxidoreductase class that catalyzes the conversion of isocitrate and NAD+ to yield 2-ketoglutarate, carbon dioxide, and NADH. It occurs in cell mitochondria. The enzyme requires Mg2+, Mn2+; it is activated by ADP, citrate, and Ca2+, and inhibited by NADH, NADPH, and ATP. The reaction is the key rate-limiting step of the citric acid (tricarboxylic) cycle. (From Dorland, 27th ed) (The NADP+ enzyme is EC 1.1.1.42.) EC 1.1.1.41.
Transport proteins that carry specific substances in the blood or across cell membranes.
A family of heat-shock proteins that contain a 70 amino-acid consensus sequence known as the J domain. The J domain of HSP40 heat shock proteins interacts with HSP70 HEAT-SHOCK PROTEINS. HSP40 heat-shock proteins play a role in regulating the ADENOSINE TRIPHOSPHATASES activity of HSP70 heat-shock proteins.
A family of archaea, in the order DESULFUROCOCCALES, consisting of anaerobic cocci which utilize peptides, proteins or carbohydrates facultatively by sulfur respiration or fermentation. There are eight genera: AEROPYRUM, Desulfurococcus, Ignicoccus, Staphylothermus, Stetteria, Sulfophoboccus, Thermodiscus, and Thermosphaera. (From Bergey's Manual of Systematic Bacteriology, 2d ed)
Proteins obtained from the species SACCHAROMYCES CEREVISIAE. The function of specific proteins from this organism are the subject of intense scientific interest and have been used to derive basic understanding of the functioning similar proteins in higher eukaryotes.
A closely related group of toxic substances elaborated by various strains of Streptomyces. They are 26-membered macrolides with lactone moieties and double bonds and inhibit various ATPases, causing uncoupling of phosphorylation from mitochondrial respiration. Used as tools in cytochemistry. Some specific oligomycins are RUTAMYCIN, peliomycin, and botrycidin (formerly venturicidin X).
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.
An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.
The thermodynamic interaction between a substance and WATER.
Membrane proteins whose primary function is to facilitate the transport of positively charged molecules (cations) across a biological membrane.
The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
... is an ATPase, which means that it is an enzyme that hydrolyzes ATP. This group of enzymes is characterised by their slow ... CCT is a group II chaperonin, a large protein complex that assists in the folding of other proteins. CCT is formed of a double ... After AMP-PNP is bound to CCT the substrates move within the chaperonin's cavity. It also seems that in the case of actin, the ... It is known that this ATPase is "active", that is, its speed increases by some 40,000 times when the actin forms part of a ...
... an enzyme Myosin ATPase, an enzyme Dynein ATPase, an enzyme Chaperonin ATPase, an enzyme Non-chaperonin molecular chaperone ... Steroid-transporting ATPase, an enzyme Xenobiotic-transporting ATPase, ... ATPase, an enzyme DNA helicase, an enzyme This disambiguation page lists articles associated with the title ATP ...
The binding of cpn10 to cpn60 inhibits the weak ATPase activity of cpn60. The RuBisCO subunit binding protein is a member of ... a chaperonin database Animations of activity of Chaperonins NIH Material on HSP60 HSP60 HSP60 in Flies The Chaperonin Home Page ... In archaea, the chaperonin is called the thermosome. In eukarya, the cytoplasmic chaperonin is called CCT (also called TRiC). ... The active chaperonin role is in turn involved with specific chaperonin-substrate interactions that may be coupled to ...
... (EC 3.6.4.9, chaperonin) is an enzyme with systematic name ATP phosphohydrolase (polypeptide-unfolding). This ... Chaperonin+ATPase at the US National Library of Medicine Medical Subject Headings (MeSH) Biology portal. ... 1996). The Chaperonins. San Diego: Academic Press. pp. -. Ranson NA, White HE, Saibil HR (July 1998). "Chaperonins". The ... Chaperonin Hemmingsen SM, Woolford C, van der Vies SM, Tilly K, Dennis DT, Georgopoulos CP, Hendrix RW, Ellis RJ (May 1988). " ...
... (EC 3.6.4.10, molecular chaperone Hsc70 ATPase) is an enzyme with systematic name ATP ... Non-chaperonin+molecular+chaperone+ATPase at the US National Library of Medicine Medical Subject Headings (MeSH) Biology portal ... Li X, Su RT, Hsu HT, Sze H (January 1998). "The molecular chaperone calnexin associates with the vacuolar H(+)-ATPase from oat ... Blond-Elguindi S, Fourie AM, Sambrook JF, Gething MJ (June 1993). "Peptide-dependent stimulation of the ATPase activity of the ...
The homolog in E. coli is GroES that is a chaperonin which usually works in conjunction with GroEL. GroES exists as a ring- ... The binding of cpn10 to cpn60 inhibits the weak ATPase activity of cpn60. Escherichia coli GroES has also been shown to bind ... Heat shock 10 kDa protein 1 (Hsp10), also known as chaperonin 10 (cpn10) or early-pregnancy factor (EPF), is a protein that in ... "Entrez Gene: HSPE1 heat shock 10kDa protein 1 (chaperonin 10)". Hemmingsen SM, Woolford C, van der Vies SM, Tilly K, Dennis DT ...
... vesicle-fusing ATPase EC 3.6.4.7: peroxisome-assembly ATPase EC 3.6.4.8: proteasome ATPase EC 3.6.4.9: chaperonin ATPase EC 3.6 ... Cu2+-exporting ATPase EC 3.6.3.5: Zn2+-exporting ATPase EC 3.6.3.6: H+-exporting ATPase EC 3.6.3.7: Na+-exporting ATPase EC 3.6 ... myosin ATPase. Now EC 3.6.4.1, myosin ATPase EC 3.6.1.33: Transferred entry: dynein ATPase. Now EC 3.6.4.2, dynein ATPase EC ... Ag+-exporting ATPase EC 3.6.4.1: myosin ATPase EC 3.6.4.2: dynein ATPase EC 3.6.4.3: microtubule-severing ATPase EC 3.6.4.4: ...
She is a structural biologist whose research has provided insight into the molecular picture of rotary ATPases. Stock was a ... 10.7554/eLife.21598 Structural and Functional Insights into the Evolution and Stress Adaptation of Type II Chaperonins Chaston ... known as rotary ATPases. The Australian Academy of Sciences states that Stock has "redefined bioenergetics of the 1990s by ...
The impaired chaperonin 60 activity leads to impaired mitochondrial quality control. Two genes DDHD1 and CYP2U1 have shown ... Semin Neurol 31(5):484-493 Wang YG, Shen L (2009) AAA ATPases and hereditary spastic paraplegia. Zhonghua Yi Xue Yi Chuan Xue ... Some examples are spastin (SPG4) and paraplegin (SPG7) are both AAA ATPases. The genes are designated SPG (Spastic gait gene). ... Two mitochondrial resident proteins are mutated in HSP: paraplegin and chaperonin 60. Paraplegin is a m-AAA metalloprotease of ...
The ATPase-binding region of Hsp90 is currently under intense study, because it is the principal binding site of drugs ... Xu Z, Horwich AL, Sigler PB (August 1997). "The crystal structure of the asymmetric GroEL-GroES-(ADP)7 chaperonin complex". ... Furthermore, substrate binding (e.g., by Aha1 and Hch1) to the MD is also known to increase the ATPase activity of Hsp90. The C ... The N-terminal domain shows homology not only among members of the Hsp90 chaperone family but also to members of the ATPase/ ...
... chaperonins Chaperonins are characterized by their barrel-shaped structure with binding sites for client proteins inside the ... Deletion of the co-chaperone AHA1 (activator of heat shock 90kDa protein ATPase homolog 1) leads to stabilization of CFTR and ...
"A mitochondrial-like chaperonin 60 gene in Giardia lamblia: evidence that diplomonads once harbored an endosymbiont related to ... ATPases in rat submandibular acinar cells". Cell Calcium. 43 (5): 469-481. doi:10.1016/j.ceca.2007.08.001. PMID 17889347. ...
Ca-ATPase ion pump Roger Tsien - Nobel laureate who pioneered the use of green fluorescent protein for biological imaging ... chaperonins Godfrey Hounsfield - development (with Allan Cormack) of computer assisted tomography Wayne L. Hubbell - circa 1989 ...
N-terminal ATPase domain - binds ATP (Adenosine triphosphate) and hydrolyzes it to ADP (Adenosine diphosphate). The NBD ... Structure of the ATPase fragment of a 70K heat-shock cognate protein.[1] ... Hsp70 by itself is characterized by a very weak ATPase activity, such that spontaneous hydrolysis will not occur for many ... However, the presence of a peptide in the binding domain stimulates the ATPase activity of Hsp70, increasing its normally slow ...
Importantly, this nanotube shows an ATPase activity and dissociates into short-chain oligomers when treated with ATP because of ... Metal Ion-Induced 1D Assembly of a Molecularly Engineered Chaperonin". Journal of the American Chemical Society. 131 (22): 7556 ...
ATPase similar (ATPase V ou Tipo V) Sen o encima ácido graxo sintase[52] ... "Chaperonin filaments: the archaeal cytoskeleton?". Proc. Natl. Acad. Sci. U.S.A. 94 (10): 5383-8. Bibcode:1997PNAS...94.5383T ...
ATPase activator activity. • protein transporter activity. Cellular component. • integral component of membrane. • ... import of mitochondrial pre-proteins into the mitochondrial matrix.The J-domain of TIM14 stimulates mtHsp70 ATPase activity to ...
ATPase similar (ATPase V ou Tipo V) Sen o encima ácido graxo sintase[52] ... "Chaperonin filaments: the archaeal cytoskeleton?". Proc. Natl. Acad. Sci. U.S.A. 94 (10): 5383-8. Bibcode:1997PNAS...94.5383T ...
ATPase's catalytic mechanismEdit. Actin is an ATPase, which means that it is an enzyme that hydrolyzes ATP. This group of ... After AMP-PNP is bound to CCT the substrates move within the chaperonin's cavity. It also seems that in the case of actin, the ... CCT is a group II chaperonin, a large protein complex that assists in the folding of other proteins. CCT is formed of a double ... It is known that this ATPase is "active", that is, its speed increases by some 40,000 times when the actin forms part of a ...
Chaperonin ATPase (EC 3.6.4.9, chaperonin) is an enzyme with systematic name ATP phosphohydrolase (polypeptide-unfolding). This ... Chaperonin+ATPase at the US National Library of Medicine Medical Subject Headings (MeSH) Biology portal. ... 1996). The Chaperonins. San Diego: Academic Press. pp. -. Ranson NA, White HE, Saibil HR (July 1998). "Chaperonins". The ... Chaperonin Hemmingsen SM, Woolford C, van der Vies SM, Tilly K, Dennis DT, Georgopoulos CP, Hendrix RW, Ellis RJ (May 1988). " ...
Non-chaperonin molecular chaperone ATPase (EC 3.6.4.10, molecular chaperone Hsc70 ATPase) is an enzyme with systematic name ATP ... Non-chaperonin+molecular+chaperone+ATPase at the US National Library of Medicine Medical Subject Headings (MeSH) Biology portal ... Li X, Su RT, Hsu HT, Sze H (January 1998). "The molecular chaperone calnexin associates with the vacuolar H(+)-ATPase from oat ... Blond-Elguindi S, Fourie AM, Sambrook JF, Gething MJ (June 1993). "Peptide-dependent stimulation of the ATPase activity of the ...
Chaperonin ATPase explanation free. What is Chaperonin ATPase? Meaning of Chaperonin ATPase medical term. What does Chaperonin ... Looking for online definition of Chaperonin ATPase in the Medical Dictionary? ... chaperonin. (redirected from Chaperonin ATPase). Also found in: Dictionary. chaperonin. (shap-ĕr-ōnin), A molecular complex ... Chaperonin ATPase , definition of Chaperonin ATPase by Medical dictionary https://medical-dictionary.thefreedictionary.com/ ...
The eukaryotic group II chaperonin TRiC/CCT is a 16-subunit complex with eight distinct but similar subunits arranged in two ... Symmetry-free cryo-EM structures of the chaperonin TRiC along its ATPase-driven conformational cycle EMBO J. 2012 Feb 1;31(3): ... The eukaryotic group II chaperonin TRiC/CCT is a 16-subunit complex with eight distinct but similar subunits arranged in two ... These structures reveal the intra- and inter-ring subunit interaction pattern changes during the ATPase cycle. In the apo state ...
ATPase activity, coupled TAS Traceable Author Statement. more info. PubMed cadherin binding HDA more info ... Cpn60_TCP1; TCP-1/cpn60 chaperonin family. cl02777. Location:1 → 488. chaperonin_like; chaperonin_like superfamily. Chaperonins ... chaperonin_like; chaperonin_like superfamily. Chaperonins are involved in productive folding of proteins. They share a common ... CCT8 chaperonin containing TCP1 subunit 8 [Homo sapiens] CCT8 chaperonin containing TCP1 subunit 8 [Homo sapiens]. Gene ID: ...
ClpB homolog, mitochondrial AAA ATPase chaperonin. Enable Javascript to view the expand/collapse boxes.. Printable PDF Open All ...
Mitochondrial AAA ATPase Chaperonin, including: function, proteins, disorders, pathways, orthologs, and expression. GeneCards ... CLPB (ClpB Homolog, Mitochondrial AAA ATPase Chaperonin) is a Protein Coding gene. Diseases associated with CLPB include 3- ... Members of this superfamily form ring-shaped homo-hexamers and have highly conserved ATPase domains that are involved in ... May function as a regulatory ATPase and be related to secretion/protein trafficking process. *CLPB_HUMAN,Q9H078 ...
CLPB: ClpB homolog, mitochondrial AAA ATPase chaperonin. *CLPP: caseinolytic mitochondrial matrix peptidase proteolytic subunit ...
ClpB homolog, mitochondrial AAA ATPase chaperonin To use the sharing features on this page, please enable JavaScript.. ...
It is thought that ATP binding to the ATPase domain triggers substrate release by causing the alpha domain to bend upwards at a ... chaperonin ... ATPase; promotes efficient folding; only in mitochondria and ... ATPase; stabilizes proteins prior to complete folding, transport across membranes and proteolysis; found associated with ... The secondary and tertiary structure of the ATPase domain is almost identical to that of actin. The Hsp70 peptide-binding ...
DR InterPro; IPR003959; ATPase_AAA_core. DR InterPro; IPR017730; Chaperonin_ClpB. DR InterPro; IPR019489; Clp_ATPase_C. DR ... DR Gene3D; 1.10.1780.10; -; 1. DR InterPro; IPR003593; AAA+_ATPase. ...
Both complexes show ATPase activity. The Cpn60 complex interacts with the Cpn10 complex. Interacts with RAB during heat stress. ... Chaperonin 60 subunit beta 2, chloroplasticAdd BLAST. 546. Amino acid modifications. Feature key. Position(s). Description ... IPR018370. Chaperonin_Cpn60_CS. IPR001844. Chaprnin_Cpn60. IPR002423. Cpn60/TCP-1. IPR037290. Cpn60/TCP-1_sf. IPR027409. GroEL- ... IPR018370. Chaperonin_Cpn60_CS. IPR001844. Chaprnin_Cpn60. IPR002423. Cpn60/TCP-1. IPR037290. Cpn60/TCP-1_sf. IPR027409. GroEL- ...
Protein binding stimulates the ATPase activity; ATP hydrolysis unfolds the denatured protein aggregates, which probably helps ... IPR003593 AAA+_ATPase. IPR003959 ATPase_AAA_core. IPR017730 Chaperonin_ClpB. IPR019489 Clp_ATPase_C. IPR004176 Clp_N. IPR036628 ... IPR003593 AAA+_ATPase. IPR003959 ATPase_AAA_core. IPR017730 Chaperonin_ClpB. IPR019489 Clp_ATPase_C. IPR004176 Clp_N. IPR036628 ... Protein binding stimulates the ATPase activity; ATP hydrolysis unfolds the denatured protein aggregates, which probably helps ...
DR InterPro; IPR013093; ATPase_AAA-2. DR InterPro; IPR003959; ATPase_AAA_core. DR InterPro; IPR018368; Chaperonin_ClpA/B_CS. DR ... InterPro; IPR001270; Chaprnin_ClpA/B. DR InterPro; IPR019489; Clp_ATPase_C. DR InterPro; IPR004176; Clp_N. DR InterPro; ...
The binding of cpn10 to cpn60 inhibits the weak ATPase activity of cpn60. ... GroES chaperonin family (IPR020818). Short name: Chaperonin_GroES Family relationships *GroES chaperonin family (IPR020818) * ... Type I chaperonins present in eubacteria, mitochondria and chloroplasts require the concerted action of 2 proteins, chaperonin ... The 10 kDa chaperonin (cpn10 - or groES in bacteria) exists as a ring-shaped oligomer of between six to eight identical ...
The eukaryotic chaperonin TRiC (or CCT) assists in the folding of 10% of cytosolic proteins. Here we present two cryo-EM ... Symmetry-free cryo-EM structures of the chaperonin TRiC along its ATPase-driven conformational cycle. EMBO J. 31, 720-730 (2012 ... Symmetry-free cryo-EM structures of the chaperonin TRiC along its ATPase-driven conformational cycle. EMBO J 31, 720-30 (2012). ... Eukaryotic chaperonin CCT stabilizes actin and tubulin folding intermediates in open quasi-native conformations. EMBO J. 19, ...
A novel cochaperonin that modulates the ATPase activity of cytoplasmic chaperonin.. Gao Y, Melki R, Walden PD, Lewis SA, Ampe C ...
It possesses an ATPase activity and does not require a co-chaperonin for its functioning. In vitro experiments demonstrated ... they are closer to bacterial chaperonins in the phylogenetic tree. Experimental investigation of putative GroEL-like chaperonin ... New GroEL-like chaperonin of bacteriophage OBP P. fluorescens suppresses thermal protein aggregation in an ATP-dependent manner ... New GroEL-like chaperonin of bacteriophage OBP P. fluorescens suppresses thermal protein aggregation in an ATP-dependent manner ...
heat shock 60kDa protein 1 (chaperonin) * chaperone ATPase HSP60 * molecular chaperone GroEL ... anti-Heat Shock 60kDa Protein 1 (Chaperonin) Antikörper * anti-Parasite Heat Shock 60kDa Protein 1 (Chaperonin) Antikörper für ... Weitere Produktkategorien zu Heat Shock 60kDa Protein 1 (Chaperonin) Antikörper * 703 anti-Heat Shock 60kDa Protein 1 ( ... Heat Shock 60kDa Protein 1 (Chaperonin) (HSPD1) Antikörper Synonyme für dieses Antigen anzeigen * 12 ...
Chaperonin) Antikörper für Flow Cytometry (FACS) vergleichen & kaufen. ... ATPase activity and v) a role in folding and assembly of oligomeric protein structures (4). These similarities are supported by ... anti-Heat Shock 60kDa Protein 1 (Chaperonin) Antikörper * anti-Insekten Heat Shock 60kDa Protein 1 (Chaperonin) Antikörper für ... Weitere Produktkategorien zu Heat Shock 60kDa Protein 1 (Chaperonin) Antikörper * 703 anti-Heat Shock 60kDa Protein 1 ( ...
ATPase activity and v) a role in folding and assembly of oligomeric protein structures (4). These similarities are supported by ... anti-Heat Shock 60kDa Protein 1 (Chaperonin) Antibodies * anti-Plasmodium falciparum Heat Shock 60kDa Protein 1 (Chaperonin) ... Heat Shock 60kDa Protein 1 (Chaperonin) (HSPD1) Antibodies show synonyms for this antigen * 12 ... Recommended Heat Shock 60kDa Protein 1 (Chaperonin) Antibody (supplied by: Log in to see ) ...
Chaperonins (CPNs) are megadalton sized ATP-dependent nanomachines that facilitate protein folding through complex cycles of ... Cystosolic chaperonin subunits have a conserved atpase domain but diverged polypeptide-binding domains. Trends Biochem. Sci. 19 ... Archaeal-like chaperonins in bacteria. Proc. Natl. Acad. Sci. USA 107, 20269-20274.CrossRefPubMedPubMedCentralGoogle Scholar ... Chaperonins: The hunt for the group II mechanism. Arch. Biochem. Biophys. 474, 331-339.CrossRefPubMedGoogle Scholar ...
The chaperonin ATPase cycle: mechanism of allosteric switching and movements of substrate-binding domains in GroEL.. Cell 87 ... Assembly of chaperonin complexes.. Mol. Biotechnol. 19 141-52 2001. Kubota H, Hynes G, Willison K. The chaperonin containing t- ... Chaperonins are grouped into two families: group I chaperonins, found in eubacteria (e.g. GroEL in Escherichia coli) and ... TCP-1-like chaperonin intermediate domain superfamily (IPR027410). Short name: TCP-1-like_intermed_sf ...
It did not seem to inhibit TRiCs substrate binding (Figure 4C) or its ATPase activity. In fact, arsenic stimulated the ATPase ... Archaeal chaperonin folding assays:. Purification of the archaeal chaperonin from Mm-Cpn was carried out by conventional ... Gutsche, I., L. O. Essen and W. Baumeister, 1999 Group II chaperonins: new TRiC(k)s and turns of a protein folding machine. J. ... Spiess, C., A. S. Meyer, S. Reissmann and J. Frydman, 2004 Mechanism of the eukaryotic chaperonin: protein folding in the ...
Symmetry-free cryo-EM structures of the chaperonin TRiC along its ATPase-driven conformational cycle EMBO JOURNAL Cong, Y., ... Chaperonins are allosteric double-ring ATPases that mediate cellular protein folding. ATP binding and hydrolysis control ... Chaperonins are large ATP-driven molecular machines that mediate cellular protein folding. Group II chaperonins use their " ... Here, we describe the fate of the substrate during the nucleotide cycle of group II chaperonins. The chaperonin substrate- ...
Binds to Cpn60 in the presence of Mg-ATP and suppresses the ATPase activity of the latter. UniProt ...
Effective ATPase Activity and Moderate Chaperonin-Cochaperonin Interaction Are Important for the Functional Single-Ring ... Creating the Functional Single-Ring GroEL-GroES chaperonin Systems via Modulating GroEL-GroES Interaction. Sci. Rep. 7: 9710, ... Biochemical and Genetic Analysis of the Chlamydial GroEL Chaperonins. J. Bacteriol. 199:(12). pii: e00844-16. doi: 10.1128/JB. ... Microbial structure, function and mechanism; biology of molecular chaperone (chaperonin). Representative Publications. Mellisa ...
Tetradecameric Mitochondrial Chaperonin; Required For ATP-dependent Folding Of Precursor Polypeptides And Complex Assembly; ... CPN60, MIF4, MNA2, chaperone ATPase HSP60, L000000819, YLR259C. Tetradecameric mitochondrial chaperonin; required for ATP- ... ATPase activity [IDA]*DNA replication origin binding [IDA]*chaperone binding [IPI]*single-stranded DNA binding [IDA]*unfolded ...
The thermosome is a class II chaperonin that represents large, barrel-shaped double-ring ATPases. Thermosomes are under study ... Apparently, the efflux of Na+ was mediated by at least two principal types of ion transporters: V-type ATPases and Na+-coupled ... Our observation may suggest that such class II chaperonins have a broader functional role than previously thought. By contrast ... respiratory enzymes (NADH-quinone oxidoreductases, NQR). Transcripts encoding V-type ATPases and Na+-NQR were enriched up to 52 ...
Kim S, Willison KR, Horwich AL (1994) Cytosolic chaperonin subunits have a conserved ATPase domain but diverged polypeptide- ...
  • The 10 kDa chaperonin (cpn10 - or groES in bacteria) exists as a ring-shaped oligomer of between six to eight identical subunits, while the 60 kDa chaperonin (cpn60 - or groEL in bacteria) forms a structure comprising 2 stacked rings, each ring containing 7 identical subunits [ PMID: 2897629 ]. (ebi.ac.uk)
  • Identification of nucleotide-binding regions in the chaperonin proteins GroEL and GroES. (ebi.ac.uk)
  • In the present work, we performed bioinformatics analysis of currently predicted GroEL-like proteins encoded by phage genomes in comparison with cellular and mitochondrial chaperonins. (biochemj.org)
  • Experimental investigation of putative GroEL-like chaperonin proteins has been continued by physicochemical and functional characterization of gp246 encoded by the genome of Pseudomonas fluorescens bacteriophage OBP. (biochemj.org)
  • The chaperonin ATPase cycle: mechanism of allosteric switching and movements of substrate-binding domains in GroEL. (ebi.ac.uk)
  • Creating the Functional Single-Ring GroEL-GroES chaperonin Systems via Modulating GroEL-GroES Interaction. (indiana.edu)
  • Biochemical and Genetic Analysis of the Chlamydial GroEL Chaperonins. (indiana.edu)
  • We develop two hypothetical mechanisms for actin folding founded upon concepts established for the bacterial type I chaperonin GroEL and extend them to the much more complex CCT system of eukaryotes. (royalsocietypublishing.org)
  • For the CCT system, perception concerning its possible roles in non-selective versus specific protein folding reactions is critical because the homologous bacterial GroEL chaperonin system does generally assist protein folding by recognizing non-native proteins via complementary hydrophobic interactions. (royalsocietypublishing.org)
  • The allosteric mechanism of the chaperonin GroEL: a dynamic analysis. (semanticscholar.org)
  • The cylindrical chaperonin GroEL and its cofactor GroES mediate ATP-dependent protein folding in Escherichia coli. (semanticscholar.org)
  • Group I chaperonins, includeing E. coli GroEL and mitochondrial HSP60, consist of 14 subunits and require ring-shaped cofactor GroES for their chaperone activities [3,9]. (scirp.org)
  • Although CCT has some features common to that of the type I chaperonin GroEL and roles of nucleotide binding and hydrolysis is well documented, CCT lacks the concerted action with co-chaperonin like GroES and uses built-in lid [16,17]. (scirp.org)
  • Here, we report the first crystal structure of Chlamydomonas chloroplast chaperonin homo-oligomer (CPN60β1) at 3.8 Å, which shares structural topology with typical type I chaperonins but with looser compaction, and possesses a larger central cavity, less contact sites and an enlarged ATP binding pocket compared to GroEL. (biomedcentral.com)
  • 27 ] found that the presence of symmetric GroEL-GroES2 complexes was largely dependent on the fluoro-fluorescence pair used to label the chaperonin system and non-foldable substrates. (biomedcentral.com)
  • Elad N, Farr GW, Clare DK, Orlova EV, Horwich AL, Saibil HR (2007) Topologies of a substrate protein bound to the chaperonin GroEL. (springer.com)
  • This study has demonstrated that expression of HSP60-HSP10 was able to carry out all essential in vivo functions of GroEL and its co-chaperonin, GroES (5). (gentaur.com)
  • GroEL, HSP60 is a chaperonin located in the mitochondria which is responsible for the transportation & refolding of proteins from the cytoplasm directly into the mitochondrial matrix. (prospecbio.com)
  • The Escherichia coli chaperonin GroEL assists in the re-folding of misfolded substrate proteins (SPs). (umd.edu)
  • In response to the binding of ATP, GroEL undergoes large, allosteric structural transitions, resulting in an expansion of its central cavity and a capping of the cavity by the co-chaperonin GroES. (umd.edu)
  • 2) The possible allosteric basis of SP's ability to stimulate the ATPase activity of GroEL was explored using standard kinetic assays. (umd.edu)
  • The eukaryotic group II chaperonin TRiC/CCT is a 16-subunit complex with eight distinct but similar subunits arranged in two stacked rings. (nih.gov)
  • These structures reveal the intra- and inter-ring subunit interaction pattern changes during the ATPase cycle. (nih.gov)
  • This gene encodes the theta subunit of the CCT chaperonin, which is abundant in the eukaryotic cytosol and may be involved in the transport and assembly of newly synthesized proteins. (nih.gov)
  • Chaperonin-containing T‑complex protein 1 subunit 8 promotes cell migration and invasion in human esophageal squamous cell carcinoma by regulating α-actin and β-tubulin expression. (nih.gov)
  • Association of the influenza virus RNA polymerase subunit PB2 with the host chaperonin CCT. (semanticscholar.org)
  • The existence of eight different subunits suggests that degree of ATPase activity may differ between subunit species [18,19]. (scirp.org)
  • CCT differs from other chaperonin family proteins in its subunit composition, which consists of eight subunit species comprising the CCT 16-mer double-ring-like complex. (acris-antibodies.com)
  • Molecular evolutionary analyses have suggested that each subunit species has a specific function in addition to contributing to a common ATPase activity. (acris-antibodies.com)
  • Consistent with this view, it has been suggested that each subunit recognizes specific substrate proteins (or their parts) and that they collectively modulate the ATPase activity of the complex. (acris-antibodies.com)
  • Using this approach we identified that SK1 interacts with subunit 7 (eta) of cytosolic chaperonin CCT (chaperonin containing t-complex polypeptide, also called TRiC for TCP-1 ring complex), a hexadecameric chaperonin that binds unfolded polypeptides and mediates their folding and release in an ATP-dependent manner. (genes2cognition.org)
  • CLPB (ClpB Homolog, Mitochondrial AAA ATPase Chaperonin) is a Protein Coding gene. (genecards.org)
  • Crystal structure of the thermosome, the archaeal chaperonin and homolog of CCT. (springer.com)
  • The SKD3 protein is a reported synonym for the human gene CLPB, encoding ClpB homolog, mitochondrial AAA ATPase chaperonin. (biocompare.com)
  • These similarities are supported by recent studies where the single-ring human mitochondrial homolog, HSP60 with its co-chaperonin, HSP10 were expressed in a E. coli strain, engineered so that the groE operon is under strict regulatory control. (gentaur.com)
  • Belongs to the GroES chaperonin family. (abcam.com)
  • HSP10, GroES coordinates the ATPase activity of the HSP60 subunits in order to allow the release of bound polypeptide in a manner that is productive for its correct folding. (prospecbio.com)
  • The eukaryotic chaperonin TRiC (or CCT) assists in the folding of 10% of cytosolic proteins. (nature.com)
  • Defining the TRiC/CCT interactome links chaperonin function to stabilization of newly made proteins with complex topologies. (nature.com)
  • Modulation of STAT3 folding and function by TRiC/CCT chaperonin. (nature.com)
  • The chaperonin TRiC blocks a huntingtin sequence element that promotes the conformational switch to aggregation. (nature.com)
  • Using an unbiased chemogenomics approach in Saccharomyces cerevisiae , we found that mutants of the chaperonin complex TRiC and the functionally related prefoldin complex are all hypersensitive to arsenic compared to a wild-type strain. (genetics.org)
  • The eukaryotic chaperonin TRiC ( TCP1 -ring complex, also called CCT) is a ∼900-kDa complex consisting of two apposed heterooligomeric protein rings. (genetics.org)
  • Cytosolic chaperonin CCT (also known as TRiC) is a hetero-oligomeric cage-like molecular chaperone that assists in protein folding by ATPase cycle-dependent conformational changes. (scirp.org)
  • Group II chaperonins, including cytosolic chaperonin CCT (also known as TRiC) of eukaryotes and archaeal chaperonins, share the double-ring structure with the group I members. (scirp.org)
  • The CCT/TRiC chaperonin is required for maturation of sphingosine kinase 1. (genes2cognition.org)
  • Thus, combined this data suggests that SK1 is a CCT/TRiC substrate, and that this chaperonin facilitates folding of newly translated SK1 into its mature active form. (genes2cognition.org)
  • A large fraction of newly translated polypeptides associate transiently with Hsc70 and the chaperonin TRiC/CCT during their biogenesis. (embopress.org)
  • the 70 kDa heat shock protein cognate (here called Hsc70) and the cytosolic chaperonin TCP1‐ring complex (TRiC, also called CCT). (embopress.org)
  • The chaperonin containing t-complex protein 1, CCT (also known as TRiC), is a large ATPase complex found in all eukaryotic cells, which mediates the folding of newly translated proteins in its inner cavity. (arvojournals.org)
  • cDNA clones encoding Arabidopsis thaliana and Zea mays mitochondrial chaperonin HSP60 and gene expression during seed germination and heat shock. (ebi.ac.uk)
  • Eukaryotic type II chaperonin CCT interacts with actin through specific subunits. (nature.com)
  • Cystosolic chaperonin subunits have a conserved atpase domain but diverged polypeptide-binding domains. (springer.com)
  • Kim S, Willison KR, Horwich AL (1994) Cytosolic chaperonin subunits have a conserved ATPase domain but diverged polypeptide-binding domains. (springer.com)
  • However, the group II chapronins have several characters distinct from the group I chaperonins: the former consists of 16 or 18 subunits and uses a built-in lid called helical protrusion to close the cylindrical structure [8,10]. (scirp.org)
  • All subunits have conserved ATPase domain and divergent substrate binding domain [12]. (scirp.org)
  • Chloroplast chaperonin, consisting of multiple subunits, mediates folding of the highly abundant protein Rubisco with the assistance of co-chaperonins. (biomedcentral.com)
  • Both chaperonins are cylindrical structures consisting of 14 identical subunits assembled into two heptameric rings. (biomedcentral.com)
  • Each of the 14 individual subunits of the chaperonins has three domains: the apical, the equatorial, and the intermediate hinge domains. (biomedcentral.com)
  • The common characteristics of the HSP60s from the divergent species are i) high abundance, ii) induction with environmental stress such as heat shock, iii) homo-oligomeric structures of either 7 or 14 subunits which reversibly dissociate in the presence of Mg2+ and ATP, iv) ATPase activity and v) a role in folding and assembly of oligomeric protein structures (4). (gentaur.com)
  • The chaperonins are oligomeric ring‐complexes, composed of ∼60 kDa subunits, which mediate the folding of polypeptide chains in an ATP‐dependent reaction. (embopress.org)
  • When its function was revisited in a vertebrate zebrafish model, it was demonstrated that knockdown of the chaperonin subunits disrupts trafficking through the cilium. (arvojournals.org)
  • Crystal structure of the CCTgamma apical domain: implications for substrate binding to the eukaryotic cytosolic chaperonin. (ebi.ac.uk)
  • Structure and function of a protein folding machine: the eukaryotic cytosolic chaperonin CCT. (semanticscholar.org)
  • The cytosolic chaperonin-containing t-complex polypeptide 1 (CCT) is a molecular chaperone that plays an important role in the folding of proteins in the eukaryotic cytosol. (acris-antibodies.com)
  • Non-chaperonin molecular chaperone ATPase (EC 3.6.4.10, molecular chaperone Hsc70 ATPase) is an enzyme with systematic name ATP phosphohydrolase (polypeptide-polymerizing). (wikipedia.org)
  • Recombinant homo- and hetero-oligomers of an ultrastable chaperonin from the archaeon Pyrodictium occultum show chaperone activity in vitro. (uni-regensburg.de)
  • The gene encoding the Group III CPN from Carboxydothermus hydrogenoformans and Candidatus Desulforudis audaxviator was cloned in E. coli and overexpressed in order to both characterize the protein and to demonstrate its ability to function as an ATPase chaperone. (umd.edu)
  • Binding and release of unfolded polypeptides are nucleotide‐dependent events that may result in folding, rebinding to Hsc70 or transfer to other chaperone systems, such as the chaperonins, for final folding (see below). (embopress.org)
  • Chaperonins function within the cytoplasm to refold damaged proteins. (thefreedictionary.com)
  • Members of this superfamily form ring-shaped homo-hexamers and have highly conserved ATPase domains that are involved in various processes including DNA replication, protein degradation and reactivation of misfolded proteins. (genecards.org)
  • The chaperonins are 'helper' molecules required for correct folding and subsequent assembly of some proteins [ PMID: 1349837 ]. (ebi.ac.uk)
  • Type I chaperonins present in eubacteria, mitochondria and chloroplasts require the concerted action of 2 proteins, chaperonin 60 (cpn60) and chaperonin 10 (cpn10) [ PMID: 12354603 ]. (ebi.ac.uk)
  • Using advanced genomic tools in the model organism yeast and biochemical experiments, we demonstrated that arsenic disturbs functions of the chaperonin complex required for proper folding and maturation of a large number of proteins. (genetics.org)
  • He has solved many cryo-EM structures including viruses, chaperonins, membrane proteins, ion channels, cytoskeleton protein complexes, protein-DNA complexes, DNA and RNA in collaboration with many scientists around the world. (stanford.edu)
  • has revealed the exquisite selectivity of this chaperonin towards the actin and tubulin cytoskeletal proteins. (royalsocietypublishing.org)
  • Another class of cylindrical-shaped chaperones, known as chaperonins, is found to be conserved in all three domains of life and assist the folding of many cytosolic proteins [ 12 , 13 ]. (pubmedcentralcanada.ca)
  • The chaperonin CCT is a large ATPase complex found in all eukaryotic cells that folds nascent proteins in its inner cavity. (arvojournals.org)
  • Genes with high transcript concentrations included those encoding flagellar filament and cytoplasmic filament proteins, prominent lipoproteins and membrane proteins, chaperonins, proteins involved in red-ox balance, chemotaxis regulatory proteins, a V-ATPase operon, and certain metabolic enzymes such as glycolytic pathway enzymes. (muni.cz)
  • Our data provide new evidence indicating the essential role of the chaperonin CCT in the biogenesis of vertebrate photoreceptor sensory cilia, and suggest that it may be due to the direct participation of the chaperonin in the posttranslational processing of selected BBS proteins and assembly of the BBSome. (arvojournals.org)
  • 1 , 2 However, the list of identified chaperonin substrates is incomplete, and all known CCT clients are soluble proteins of a wide range of structures and functions. (arvojournals.org)
  • Of the chaperones, the chaperonin family has the most distinctive structure: they contain large multisubunit assemblies essential in mediation of ATP-dependent polypeptide chain folding in a variety of cellular compartments. (springer.com)
  • Chaperonins (CPNs) are ubiquitous and essential chaperones. (umd.edu)
  • Chaperonin ATPase (EC 3.6.4.9, chaperonin) is an enzyme with systematic name ATP phosphohydrolase (polypeptide-unfolding). (wikipedia.org)
  • Chaperonins are large cylindrical structures that transiently enclose a partially folded polypeptide and allow it to continue folding in a sequestered environment. (ebi.ac.uk)
  • The chaperonin containing t-complex polypeptide 1 (TCP-1). (ebi.ac.uk)
  • All chaperonins mediate ATP-dependent polypeptide folding by confining substrates within a central chamber. (semanticscholar.org)
  • For example, nascent polypeptide chain coming out from ribosome will first bind to Hsp70/Hsp90 which will help attain a quasinative structure and then will be transferred to chaperonin CCT for its final folding [ 14 , 15 ]. (pubmedcentralcanada.ca)
  • The binding of cpn10 to cpn60 inhibits the weak ATPase activity of cpn60. (ebi.ac.uk)
  • Cpn60 in mitochondria and chloroplasts), and group II chaperonins, found in archaea and the eukaryotic cytosol (CCT or TCP-1 complex) [ PMID: 11725484 , PMID: 7601114 ]. (ebi.ac.uk)
  • Binds to Cpn60 in the presence of Mg-ATP and suppresses the ATPase activity of the latter. (rcsb.org)
  • The first crystal structure of Chlamydomonas chloroplast chaperonin homo-oligomer (CPN60β1) is reported. (biomedcentral.com)
  • ATP hydrolysis drives the chaperonin allosteric cycle to assist substrate folding and promotes disassembly of chloroplast chaperonin. (biomedcentral.com)
  • Mutations of residues implicated in ATP binding and hydrolysis by structural studies abolish this ATPase activity in vitro and disrupt Hsp90 function in vivo . (embopress.org)
  • It possesses an ATPase activity and does not require a co-chaperonin for its functioning. (biochemj.org)
  • Both groups share a common monomer architecture of three domains: an equatorial domain that carries ATPase activity, an intermediate domain, and an apical domain, involved in substrate binding [ PMID: 8861908 , PMID: 12083524 ]. (ebi.ac.uk)
  • Effective ATPase Activity and Moderate Chaperonin-Cochaperonin Interaction Are Important for the Functional Single-Ring Chaperonin System. (indiana.edu)
  • All three recombinant complex species exhibit ATPase activity. (uni-regensburg.de)
  • We purified CCT by using ATP-Sepharose and other columns, and found that CCT possesses ability to hydrolyze GTP, with an activity level very similar to the ATPase activity. (scirp.org)
  • Here, we purified CCT from porcine testis by a simple method, and found that CCT possesses a GTPase activity in addition to an ATPase activity. (scirp.org)
  • YbbN acts as a mild inhibitor of GroESL chaperonin function and ATPase activity, suggesting that it is a negative regulator of the GroESL system. (unl.edu)
  • Moreover, two amino acid (aa) residues (G153, G154) conserved among Cpn60s are involved in ATPase activity regulated by co-chaperonins. (biomedcentral.com)
  • Here we demonstrate in vitro an inherent ATPase activity in both yeast Hsp90 and the Escherichia coli homologue HtpG, which is sensitive to inhibition by the Hsp90‐specific antibiotic geldanamycin. (embopress.org)
  • The protein has ATPase activity at the time of manufacture of 3.6µM phosphate liberated/hr/µg protein in a 200µl reaction at 37°C (pH7.5) in the presence of 20ul of 1mM ATP using a Malachite Green assay. (gentaur.com)
  • The CCT activity in rod photoreceptors of mice was suppressed by overexpressing the chaperonin inhibitor, phosducin-like protein short, and the ensuing changes of cellular morphology were analyzed by light and electron microscopy. (arvojournals.org)
  • In contrast with other known archaeal chaperonins, Mm-cpn is fully functional in all respects under physiological conditions of 37 degrees C. The complex has Mg(2+)-dependent ATPase activity and can prevent the aggregation of citrate synthase. (mysciencework.com)
  • It was also found that SP stimulates ATPase activity by binding to and holding a ring in the more active, closed conformation. (umd.edu)
  • Association of Rubisco activase with chaperonin-60beta: a possible mechanism for protecting photosynthesis during heat stress. (uniprot.org)
  • Chaperonins: The hunt for the group II mechanism. (springer.com)
  • A free-energy-based approach is used to describe the mechanism through which chaperonin-containing TCP-1 (CCT) folds the filament-forming cytoskeletal protein actin, which is one of its primary substrates. (royalsocietypublishing.org)
  • Clp ATPases, which are hexameric ring-shaped AAA+ nanomachines that perform substrate protein (SP) unfolding and translocation for protein degradation, are suggested to undergo sequential allostery 5 . (jbsdonline.com)
  • Chaperonins (CPNs) are megadalton sized ATP-dependent nanomachines that facilitate protein folding through complex cycles of complex allosteric articulation. (springer.com)
  • Crystal structures of a group II chaperonin reveal the open and closed states associated with the protein folding cycle. (springer.com)
  • The effect of macromolecular crowding on chaperonin-mediated protein folding. (semanticscholar.org)
  • Chaperonins are large cylindrical complexes that enhance the efficiency of protein folding [3]. (scirp.org)
  • Brinker A, Pfeifer G, Kerner MJ, Naylor DJ, Hartl FU, Hayer-Hartl M (2001) Dual function of protein confinement in chaperonin-assisted protein folding. (springer.com)
  • Chaperonin nanomachines assist protein folding through concerted allostery in bacteria 1,2 and sequential allostery in eukaryotic and archaeal organisms 3,4 . (jbsdonline.com)
  • Dynamics of the chaperonin ATPase cycle implications for facilitated protein folding. (retzepti.ru)
  • Nucleotide-dependent protein folding in the type II chaperonin. (mysciencework.com)
  • Nucleotide-dependent protein folding in the type II chaperonin from the mesophilic archaeon Methanococcus maripaludis. (mysciencework.com)
  • Eukaryotic chaperonin CCT stabilizes actin and tubulin folding intermediates in open quasi-native conformations. (nature.com)
  • Chaperonins has been divided into two classes: group I chaperonins are found in prokaryotes and eukaryotic organelles including mitochondria and cytoplasm [4-6] whereas group II chaperonins are found in the eukaryotic cytosol and archaea [7,8]. (scirp.org)
  • Both chaperonin groups share a similar molecular architecture consisting of two back-to-back stacked rings, with a central cavity in each ring that allows substrates to fold. (biomedcentral.com)
  • OriGene Technologies offers a range of monoclonal antibodies to different polypeptides of the CCT chaperonin molecule complex. (acris-antibodies.com)
  • Overexpression of a bacterial chaperonin 'trap' that irreversibly captures unfolded polypeptides did not interrupt the productive folding pathway. (embopress.org)
  • Archibald JM, Logsdon JM, Doolittle WF (1999) Recurrent paralogy in the evolution of archaeal chaperonins. (springer.com)
  • nevertheless, they are closer to bacterial chaperonins in the phylogenetic tree. (biochemj.org)
  • Single particle electron microscopy analysis revealed the different conformational states of OBP chaperonin, depending on the bound nucleotide. (biochemj.org)
  • While some evidence suggests an essential role for the chaperonin containing t-complex protein 1 (CCT) in ciliogenesis, this function remains poorly understood mechanistically. (arvojournals.org)
  • CCT duplicated from a precursor, thermosome-like chaperonin, while also coming into contact with at least two novel protein folds derived by lateral gene transfer from a eubacterial symbiote, probably the donor of the mitochondrion. (royalsocietypublishing.org)
  • Recently, we discovered and studied the first virus-encoded chaperonin of bacteriophage EL Pseudomonas aeruginosa , gene product (gp) 146. (biochemj.org)
  • In vitro experiments demonstrated that gp246 is able to suppress the thermal protein inactivation and aggregation in an ATP-dependent manner, thus indicating chaperonin function. (biochemj.org)
  • We report the characterization of the first chaperonin (Mm-cpn) from a mesophilic archaeon, Methanococcus maripaludis. (mysciencework.com)
  • May function as a regulatory ATPase and be related to secretion/protein trafficking process. (genecards.org)