RNA, Archaeal
Chromosomes
Chromosome Mapping
Archaea
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.
Chromosome Banding
Staining of bands, or chromosome segments, allowing the precise identification of individual chromosomes or parts of chromosomes. Applications include the determination of chromosome rearrangements in malformation syndromes and cancer, the chemistry of chromosome segments, chromosome changes during evolution, and, in conjunction with cell hybridization studies, chromosome mapping.
X Chromosome
Chromosome Aberrations
Sex Chromosomes
The homologous chromosomes that are dissimilar in the heterogametic sex. There are the X CHROMOSOME, the Y CHROMOSOME, and the W, Z chromosomes (in animals in which the female is the heterogametic sex (the silkworm moth Bombyx mori, for example)). In such cases the W chromosome is the female-determining and the male is ZZ. (From King & Stansfield, A Dictionary of Genetics, 4th ed)
Chromosomes, Human, Pair 1
Chromosomes, Human
Chromosomes, Bacterial
Chromosomes, Human, Pair 7
Chromosomes, Human, Pair 11
Chromosomes, Human, Pair 17
Gene Expression Regulation, Archaeal
Chromosomes, Human, Pair 6
Chromosomes, Human, Pair 9
Chromosomes, Human, Pair 21
Chromosomes, Plant
Chromosomes, Fungal
Chromosomes, Human, 6-12 and X
Molecular Sequence Data
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.
Chromosomes, Human, Pair 2
Chromosomes, Human, Pair 16
Chromosomes, Human, Pair 22
Chromosomes, Mammalian
Chromosomes, Human, Pair 13
Chromosomes, Human, Pair 4
Chromosomes, Human, Pair 10
Chromosomes, Archaeal
Chromosomes, Human, Y
Chromosomes, Human, Pair 8
Chromosomes, Human, Pair 19
Chromosome Disorders
Sulfolobus
Chromosomes, Artificial, Bacterial
Chromosomes, Human, X
Chromosomes, Human, 1-3
Chromosomes, Human, Pair 12
Chromosome Painting
A technique for visualizing CHROMOSOME ABERRATIONS using fluorescently labeled DNA probes which are hybridized to chromosomal DNA. Multiple fluorochromes may be attached to the probes. Upon hybridization, this produces a multicolored, or painted, effect with a unique color at each site of hybridization. This technique may also be used to identify cross-species homology by labeling probes from one species for hybridization with chromosomes from another species.
Chromosomes, Human, Pair 5
Chromosomes, Human, Pair 15
Methanobacteriaceae
In Situ Hybridization, Fluorescence
Methanococcales
Chromosomes, Human, Pair 14
Chromosomes, Human, Pair 18
Chromosomes, Human, 16-18
Chromosomes, Human, Pair 20
Crenarchaeota
Chromosomes, Artificial, Yeast
Chromosomes in which fragments of exogenous DNA ranging in length up to several hundred kilobase pairs have been cloned into yeast through ligation to vector sequences. These artificial chromosomes are used extensively in molecular biology for the construction of comprehensive genomic libraries of higher organisms.
Chromosomes, Human, 13-15
Base Sequence
Genetic Linkage
Chromosome Breakage
Chromosomes, Human, 21-22 and Y
Methanococcus
Sulfolobus solfataricus
Chromosome Inversion
Genetic Markers
Chromosome Positioning
Pyrococcus furiosus
Chromosomes, Human, 4-5
Amino Acid Sequence
Ribosome Subunits, Large, Archaeal
X Chromosome Inactivation
Centromere
Sequence Analysis, DNA
Pyrococcus abyssi
Evolution, Molecular
Translocation, Genetic
Meiosis
Hybrid Cells
Chromosomes, Human, 19-20
Mutation
Aneuploidy
The chromosomal constitution of cells which deviate from the normal by the addition or subtraction of CHROMOSOMES, chromosome pairs, or chromosome fragments. In a normally diploid cell (DIPLOIDY) the loss of a chromosome pair is termed nullisomy (symbol: 2N-2), the loss of a single chromosome is MONOSOMY (symbol: 2N-1), the addition of a chromosome pair is tetrasomy (symbol: 2N+2), the addition of a single chromosome is TRISOMY (symbol: 2N+1).
Cloning, Molecular
Metaphase
Recombination, Genetic
Mitosis
Archaeoglobus fulgidus
Methanosarcina
A genus of anaerobic, irregular spheroid-shaped METHANOSARCINALES whose organisms are nonmotile. Endospores are not formed. These archaea derive energy via formation of methane from acetate, methanol, mono-, di-, and trimethylamine, and possibly, carbon monoxide. Organisms are isolated from freshwater and marine environments.
Sulfolobus acidocaldarius
Sequence Alignment
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.
Sequence Homology, Amino Acid
Lod Score
Pyrococcus horikoshii
Pedigree
Crosses, Genetic
Microsatellite Repeats
Phenotype
DNA
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).
Bacteria
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.
Acidianus
A genus of facultatively anaerobic coccoid ARCHAEA, in the family SULFOLOBACEAE. Cells are highly irregular in shape and thermoacidophilic. Lithotrophic growth occurs aerobically via sulfur oxidation in some species. Distribution includes solfataric springs and fields, mudholes, and geothermically heated acidic marine environments.
Methane
Alleles
Polymerase Chain Reaction
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.
Models, Genetic
Chromosomal Proteins, Non-Histone
Euryarchaeota
RNA, Ribosomal, 16S
Nucleic Acid Hybridization
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)
Pyrococcus
Nondisjunction, Genetic
Chromosomes, Artificial, Human
Kinetochores
Multigene Family
A set of genes descended by duplication and variation from some ancestral gene. Such genes may be clustered together on the same chromosome or dispersed on different chromosomes. Examples of multigene families include those that encode the hemoglobins, immunoglobulins, histocompatibility antigens, actins, tubulins, keratins, collagens, heat shock proteins, salivary glue proteins, chorion proteins, cuticle proteins, yolk proteins, and phaseolins, as well as histones, ribosomal RNA, and transfer RNA genes. The latter three are examples of reiterated genes, where hundreds of identical genes are present in a tandem array. (King & Stanfield, A Dictionary of Genetics, 4th ed)
DNA, Ribosomal
Thermoplasma
Telomere
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.
Glyceryl Ethers
Chromosome Walking
A technique with which an unknown region of a chromosome can be explored. It is generally used to isolate a locus of interest for which no probe is available but that is known to be linked to a gene which has been identified and cloned. A fragment containing a known gene is selected and used as a probe to identify other overlapping fragments which contain the same gene. The nucleotide sequences of these fragments can then be characterized. This process continues for the length of the chromosome.
DNA-Binding Proteins
Chromosomal Instability
Spindle Apparatus
Blotting, Southern
Chromosome Fragility
Species Specificity
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.
Thermoproteaceae
Geologic Sediments
A mass of organic or inorganic solid fragmented material, or the solid fragment itself, that comes from the weathering of rock and is carried by, suspended in, or dropped by air, water, or ice. It refers also to a mass that is accumulated by any other natural agent and that forms in layers on the earth's surface, such as sand, gravel, silt, mud, fill, or loess. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1689)
Genotype
Models, Molecular
Haplotypes
Repetitive Sequences, Nucleic Acid
Sequences of DNA or RNA that occur in multiple copies. There are several types: INTERSPERSED REPETITIVE SEQUENCES are copies of transposable elements (DNA TRANSPOSABLE ELEMENTS or RETROELEMENTS) dispersed throughout the genome. TERMINAL REPEAT SEQUENCES flank both ends of another sequence, for example, the long terminal repeats (LTRs) on RETROVIRUSES. Variations may be direct repeats, those occurring in the same direction, or inverted repeats, those opposite to each other in direction. TANDEM REPEAT SEQUENCES are copies which lie adjacent to each other, direct or inverted (INVERTED REPEAT SEQUENCES).
Gene Deletion
Methanobacterium
Sequence Homology, Nucleic Acid
DNA Primers
Eukaryotic Cells
DNA, Satellite
Highly repetitive DNA sequences found in HETEROCHROMATIN, mainly near centromeres. They are composed of simple sequences (very short) (see MINISATELLITE REPEATS) repeated in tandem many times to form large blocks of sequence. Additionally, following the accumulation of mutations, these blocks of repeats have been repeated in tandem themselves. The degree of repetition is on the order of 1000 to 10 million at each locus. Loci are few, usually one or two per chromosome. They were called satellites since in density gradients, they often sediment as distinct, satellite bands separate from the bulk of genomic DNA owing to a distinct BASE COMPOSITION.
Methanosarcinales
Polymorphism, Restriction Fragment Length
DNA Probes
Species- or subspecies-specific DNA (including COMPLEMENTARY DNA; conserved genes, whole chromosomes, or whole genomes) used in hybridization studies in order to identify microorganisms, to measure DNA-DNA homologies, to group subspecies, etc. The DNA probe hybridizes with a specific mRNA, if present. Conventional techniques used for testing for the hybridization product include dot blot assays, Southern blot assays, and DNA:RNA hybrid-specific antibody tests. Conventional labels for the DNA probe include the radioisotope labels 32P and 125I and the chemical label biotin. The use of DNA probes provides a specific, sensitive, rapid, and inexpensive replacement for cell culture techniques for diagnosing infections.
Methanobacteriales
Plasmids
Drosophila melanogaster
Transcription, Genetic
Genes
Diploidy
Ribosome Subunits, Small, Archaeal
Chromatids
Either of the two longitudinally adjacent threads formed when a eukaryotic chromosome replicates prior to mitosis. The chromatids are held together at the centromere. Sister chromatids are derived from the same chromosome. (Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
Conserved Sequence
Mosaicism
Heterozygote
Protein Structure, Tertiary
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.
Saccharomyces cerevisiae
Cell Cycle Proteins
Proteins that control the CELL DIVISION CYCLE. This family of proteins includes a wide variety of classes, including CYCLIN-DEPENDENT KINASES, mitogen-activated kinases, CYCLINS, and PHOSPHOPROTEIN PHOSPHATASES as well as their putative substrates such as chromatin-associated proteins, CYTOSKELETAL PROTEINS, and TRANSCRIPTION FACTORS.
Desulfurococcaceae
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)
Polytene Chromosomes
Polyploidy
Nuclear Proteins
Chromatin
Prophase
Interphase
Gene Dosage
The number of copies of a given gene present in the cell of an organism. An increase in gene dosage (by GENE DUPLICATION for example) can result in higher levels of gene product formation. GENE DOSAGE COMPENSATION mechanisms result in adjustments to the level GENE EXPRESSION when there are changes or differences in gene dosage.
Crystallography, X-Ray
Nitrification
Loss of Heterozygosity
Methanococcaceae
Genome, Human
Cytogenetic Analysis
Cytogenetics
Sulfolobales
Karyotype
Nucleic Acid Conformation
Genome
Polymorphism, Genetic
The regular and simultaneous occurrence in a single interbreeding population of two or more discontinuous genotypes. The concept includes differences in genotypes ranging in size from a single nucleotide site (POLYMORPHISM, SINGLE NUCLEOTIDE) to large nucleotide sequences visible at a chromosomal level.
Cosmids
Korarchaeota
Chromosome Fragile Sites
Specific loci that show up during KARYOTYPING as a gap (an uncondensed stretch in closer views) on a CHROMATID arm after culturing cells under specific conditions. These sites are associated with an increase in CHROMOSOME FRAGILITY. They are classified as common or rare, and by the specific culture conditions under which they develop. Fragile site loci are named by the letters "FRA" followed by a designation for the specific chromosome, and a letter which refers to which fragile site of that chromosome (e.g. FRAXA refers to fragile site A on the X chromosome. It is a rare, folic acid-sensitive fragile site associated with FRAGILE X SYNDROME.)
Gene Rearrangement
Biodiversity
Sex Chromosome Disorders
DNA Transposable Elements
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.
Nucleoid structure and partition in Methanococcus jannaschii: an archaeon with multiple copies of the chromosome. (1/63)
We measured different cellular parameters in the methanogenic archaeon Methanococcus jannaschii. In exponential growth phase, the cells contained multiple chromosomes and displayed a broad variation in size and DNA content. In most cells, the nucleoids were organized into a thread-like network, although less complex structures also were observed. During entry into stationary phase, chromosome replication continued to termination while no new rounds were initiated: the cells ended up with one to five chromosomes per cell with no apparent preference for any given DNA content. Most cells in stationary phase contained more than one genome equivalent. Asymmetric divisions were detected in stationary phase, and the nucleoids were found to be significantly more compact than in exponential phase. (+info)Changes in cell size and DNA content in Sulfolobus cultures during dilution and temperature shift experiments. (2/63)
Stationary-phase cultures of different hyperthermophilic species of the archaeal genus Sulfolobus were diluted into fresh growth medium and analyzed by flow cytometry and phase-fluorescence microscopy. After dilution, cellular growth started rapidly but no nucleoid partition, cell division, or chromosome replication took place until the cells had been increasing in size for several hours. Initiation of chromosome replication required that the cells first go through partition and cell division, revealing a strong interdependence between these key cell cycle events. The time points at which nucleoid partition, division, and replication occurred after the dilution were used to estimate the relative lengths of the cell cycle periods. When exponentially growing cultures were diluted into fresh growth medium, there was an unexpected transient inhibition of growth and cell division, showing that the cultures did not maintain balanced growth. Furthermore, when cultures growing at 79 degrees C were shifted to room temperature or to ice-water baths, the cells were found to "freeze" in mid-growth. After a shift back to 79 degrees C, growth, replication, and division rapidly resumed and the mode and kinetics of the resumption differed depending upon the nature and length of the shifts. Dilution of stationary-phase cultures provides a simple protocol for the generation of partially synchronized populations that may be used to study cell cycle-specific events. (+info)Halophilic 20S proteasomes of the archaeon Haloferax volcanii: purification, characterization, and gene sequence analysis. (3/63)
A 20S proteasome, composed of alpha(1) and beta subunits arranged in a barrel-shaped structure of four stacked rings, was purified from a halophilic archaeon Haloferax volcanii. The predominant peptide-hydrolyzing activity of the 600-kDa alpha(1)beta-proteasome on synthetic substrates was cleavage carboxyl to hydrophobic residues (chymotrypsin-like [CL] activity) and was optimal at 2 M NaCl, pH 7.7 to 9.5, and 75 degrees C. The alpha(1)beta-proteasome also hydrolyzed insulin B-chain protein. Removal of NaCl inactivated the CL activity of the alpha(1)beta-proteasome and dissociated the complex into monomers. Rapid equilibration of the monomers into buffer containing 2 M NaCl facilitated their reassociation into fully active alpha(1)beta-proteasomes of 600 kDa. However, long-term incubation of the halophilic proteasome in the absence of salt resulted in hydrolysis and irreversible inactivation of the enzyme. Thus, the isolated proteasome has unusual salt requirements which distinguish it from any proteasome which has been described. Comparison of the beta-subunit protein sequence with the sequence deduced from the gene revealed that a 49-residue propeptide is removed to expose a highly conserved N-terminal threonine which is proposed to serve as the catalytic nucleophile and primary proton acceptor during peptide bond hydrolysis. Consistent with this mechanism, the known proteasome inhibitors carbobenzoxyl-leucinyl-leucinyl-leucinal-H (MG132) and N-acetyl-leucinyl-leucinyl-norleucinal (calpain inhibitor I) were found to inhibit the CL activity of the H. volcanii proteasome (K(i) = 0.2 and 8 microM, respectively). In addition to the genes encoding the alpha(1) and beta subunits, a gene encoding a second alpha-type proteasome protein (alpha(2)) was identified. All three genes coding for the proteasome subunits were mapped in the chromosome and found to be unlinked. Modification of the methods used to purify the alpha(1)beta-proteasome resulted in the copurification of the alpha(2) protein with the alpha(1) and beta subunits in nonstoichometric ratios as cylindrical particles of four stacked rings of 600 kDa with CL activity rates similar to the alpha(1)beta-proteasome, suggesting that at least two separate 20S proteasomes are synthesized. This study is the first description of a prokaryote which produces two separate 20S proteasomes and suggests that there may be distinct physiological roles for the two different alpha subunits in this halophilic archaeon. (+info)The single minichromosome maintenance protein of Methanobacterium thermoautotrophicum DeltaH contains DNA helicase activity. (4/63)
Previous studies have identified an ATP-dependent DNA helicase activity intrinsic to the human minichromosome maintenance (MCM) complex, composed of MCM subunits 4, 6, and 7 [Ishimi, Y. (1997) J. Biol. Chem. 272, 24508-24513]. In contrast to the presence of multiple MCM genes (at least six) in eukaryotes, the archaeon Methanobacterium thermoautotrophicum DeltaH (mth) genome contains a single open reading frame coding for an MCM protein. In this study we report the isolation of the mthMCM protein overexpressed in Escherichia coli. The purified recombinant protein was found to exist in both multimeric ( approximately 10(3) kDa) and monomeric (76 kDa) forms. Both forms of the protein bind to single-stranded DNA, hydrolyze ATP in the presence of DNA, and possess 3'-to-5' ATP-dependent DNA helicase activities. Thus, a single mthMCM protein contains biochemical properties identical to those associated with the eukaryotic MCM4, -6, and -7 complex. These results suggest that the characterization of the mthMCM protein and its multiple forms may contribute to our understanding of the role of MCM helicase activity in eukaryotic chromosomal DNA replication. (+info)Generation of dominant selectable markers for resistance to pseudomonic acid by cloning and mutagenesis of the ileS gene from the archaeon Methanosarcina barkeri fusaro. (5/63)
Currently, only one selectable marker is available for genetic studies in the archaeal genus Methanosarcina. Here we report the generation of selectable markers that encode resistance to pseudomonic acid (PA(r)) in Methanosarcina species by mutagenesis of the isoleucyl-tRNA synthetase gene (ileS) from Methanosarcina barkeri Fusaro. The M. barkeri ileS gene was obtained by screening of a genomic library for hybridization to a PCR fragment. The complete 3,787-bp DNA sequence surrounding and including the ileS gene was determined. As expected, M. barkeri IleS is phylogenetically related to other archaeal IleS proteins. The ileS gene was cloned into a Methanosarcina-Escherichia coli shuttle vector and mutagenized with hydroxylamine. Nine independent PA(r) clones were isolated after transformation of Methanosarcina acetivorans C2A with the mutagenized plasmids. Seven of these clones carry multiple changes from the wild-type sequence. Most mutations that confer PA(r) were shown to alter amino acid residues near the KMSKS consensus sequence of class I aminoacyl-tRNA synthetases. One particular mutation (G594E) was present in all but one of the PA(r) clones. The MIC of pseudomonic acid for M. acetivorans transformed with a plasmid carrying this single mutation is 70 microgram/ml of medium (for the wild type, the MIC is 12 microgram/ml). The highest MICs (560 microgram/ml) were observed with two triple mutants, A440V/A482T/G594E and A440V/G593D/G594E. Plasmid shuttle vectors and insertion cassettes that encode PA(r) based on the mutant ileS alleles are described. Finally, the implications of the specific mutations we isolated with respect to binding of pseudomonic acid by IleS are discussed. (+info)Bacterial mode of replication with eukaryotic-like machinery in a hyperthermophilic archaeon. (6/63)
Despite a rapid increase in the amount of available archaeal sequence information, little is known about the duplication of genetic material in the third domain of life. We identified a single origin of bidirectional replication in Pyrococcus abyssi by means of in silico analyses of cumulative oligomer skew and the identification of an early replicating chromosomal segment. The replication origin in three Pyrococcus species was found to be highly conserved, and several eukaryotic-like DNA replication genes were clustered around it. As in Bacteria, the chromosomal region containing the replication terminus was a hot spot of genome shuffling. Thus, although bacterial and archaeal replication proteins differ profoundly, they are used to replicate chromosomes in a similar manner in both prokaryotic domains. (+info)Genome evolution at the genus level: comparison of three complete genomes of hyperthermophilic archaea. (7/63)
We have compared three complete genomes of closely related hyperthermophilic species of Archaea belonging to the Pyrococcus genus: Pyrococcus abyssi, Pyrococcus horikoshii, and Pyrococcus furiosus. At the genomic level, the comparison reveals a differential conservation among four regions of the Pyrococcus chromosomes correlated with the location of genetic elements mediating DNA reorganization. This discloses the relative contribution of the major mechanisms that promote genomic plasticity in these Archaea, namely rearrangements linked to the replication terminus, insertion sequence-mediated recombinations, and DNA integration within tRNA genes. The combination of these mechanisms leads to a high level of genomic plasticity in these hyperthermophilic Archaea, at least comparable to the plasticity observed between closely related bacteria. At the proteomic level, the comparison of the three Pyrococcus species sheds light on specific selection pressures acting both on their coding capacities and evolutionary rates. Indeed, thanks to two independent methods, the "reciprocal best hits" approach and a new distance ratio analysis, we detect the false orthology relationships within the Pyrococcus lineage. This reveals a high amount of differential gains and losses of genes since the divergence of the three closely related species. The resulting polymorphism is probably linked to an adaptation of these free-living organisms to differential environmental constraints. As a corollary, we delineate the set of orthologous genes shared by the three species, that is, the genes that may characterize the Pyrococcus genus. In this conserved core, the amino acid substitution rate is equal between P. abyssi and P. horikoshii for most of their shared proteins, even for fast-evolving ones. In contrast, strong discrepancies exist among the substitution rates observed in P. furiosus relative to the two other species, which is in disagreement with the molecular clock hypothesis. (+info)In vivo interactions of archaeal Cdc6/Orc1 and minichromosome maintenance proteins with the replication origin. (8/63)
Although genome analyses have suggested parallels between archaeal and eukaryotic replication systems, little is known about the DNA replication mechanism in Archaea. By two-dimensional gel electrophoreses we positioned a replication origin (oriC) within 1 kb in the chromosomal DNA of Pyrococcus abyssi, an anaerobic hyperthermophile, and demonstrated that the oriC is physically linked to the cdc6 gene. Our chromatin immunoprecipitation assays indicated that P. abyssi Cdc6 and minichromosome maintenance (MCM) proteins bind preferentially to the oriC region in the exponentially growing cells. Whereas the oriC association of MCM was specifically inhibited by stopping DNA replication with puromycin treatment, Cdc6 protein stayed bound to the replication origin after de novo protein synthesis was inhibited. Our data suggest that archaeal and eukaryotic Cdc6 and MCM proteins function similarly in replication initiation and imply that an oriC association of MCM could be regulated by an unknown mechanism in Archaea. (+info)
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cdt1 - oi
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Intersubunit allosteric communication mediated by a conserved loop in the MCM helicase. - Immunology
TumorPortal
TIGR04217
polytene chromosome
H3K4me3 demethylation by the histone demethylase KDM5C/JARID1C promotes DNA replication origin firing.
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Minichromosome maintenance protein elisa and antibody
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New paper reveals mechanisms redefining the understanding of DNA licensing - Speck Lab / DNA Replication Group - Christian Speck
Methanothermobacter wolfeii
Minichromosome Maintenance Complex Component 8 | REACH
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Positive and negative regulation of telomerase access to the telomere | Journal of Cell Science
Protein MCM10 homolog
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Minichromosome Maintenance Complex Component 5 (MCM5) Antikörper
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Genome
Samson RY, Bell SD (2014). "Archaeal chromosome biology". Journal of Molecular Microbiology and Biotechnology. 24 (5-6): 420-27 ... Eukaryotic genomes are composed of one or more linear DNA chromosomes. The number of chromosomes varies widely from Jack jumper ... The Bacterial Chromosome: 525-540. doi:10.1128/9781555817640.ch29. ISBN 9781555812324. "Bacterial Chromosomes". Microbial ... A genome sequence is the complete list of the nucleotides (A, C, G, and T for DNA genomes) that make up all the chromosomes of ...
Microbial genetics
Archaeal Genetics is the study of genes that consist of single nucleus-free cells. Archaea have a single, circular chromosomes ... Archaeal chromosomes replicate from different origins of replication, producing two haploid daughter cells. " They share a ... "Archaeal genetics - Latest research and news , Nature". www.nature.com. "Archaeal Genetics , Boundless Microbiology". courses. ... Even though archaeal cells have cells walls, they do not contain peptidoglycan, which means archaea do not produce cellulose or ...
Origin of replication
"Extrachromosomal element capture and the evolution of multiple replication origins in archaeal chromosomes". Proceedings of the ... Although the evolutionary kinship of archaeal and eukaryotic initiators and replicative helicases indicates that archaeal MCM ... Like the archaeal replicative helicase core, Mcm2-7 is loaded as a head-to-head double hexamer onto DNA to license origins. In ... Archaeal replication origins share some but not all of the organizational features of bacterial oriC. Unlike bacteria, Archaea ...
Pre-replication complex
The origins are generally AT-rich tracts that vary based on the archaeal species. The singular archaeal ORC protein recognizes ... Eukaryotes typically have multiple origins of replication; at least one per chromosome. Saccharomyces cerevisiae (S. cerevisiae ... The archaeal pre-RC is very different from the bacterial pre-RC and can serve as a simplified model of the eukaryotic pre-RC. ...
Topoisomerase
... circular chromosomes), and can also relieve entanglement of linear chromosomes. The double-helical configuration of DNA strands ... There is limited knowledge about the archaeal genome sequences. Therefore, there is also limited knowledge about the ... One of the most essential topological problems occurs at the very end of replication, when daughter chromosomes must be fully ... It is also used for relaxing solenoidal supercoils that form when chromosomes condense in preparation for mitosis. The two type ...
Bacillus safensis
This strain displays a GC-content of 46.1% in a circular chromosome of 3.68 Mbp. 3,928 protein-coding sequences were identified ... RAST, Rapid Annotation using Subsystem Technology, is a server that generates bacterial and archaeal genome annotations. The ...
Linker histone H1 variants
They are encoded by genes within histone cluster 1 located in human cells on chromosome 6. The five further variants are ... Rather than originating from archaeal histones, it probably evolved from a bacterial protein. Unlike core histones featuring a ... inactive chromatin: distribution in human fetal fibroblasts". Chromosome Research. 8 (5): 405-424. doi:10.1023/A:1009262819961 ...
Chargaff's rules
... the bacterial chromosomes, the double stranded DNA viral genomes, and the archaeal chromosomes. It does not apply to organellar ... specifically it applies to the eukaryotic chromosomes, ...
Condensin
In D. melanogaster, condensin II subunits contribute to the dissolution of polytene chromosomes and the formation of chromosome ... Many eubacterial and archaeal species have SMC-ScpAB, whereas a subgroup of eubacteria (known as γ-proteobacteria) including ... High-throughput chromosome conformation capture). The impact of condensin deficiency on chromosome conformation has been ... elegans has a specialized chromosome structure known as holocentric chromosomes. Fungi, such as S. cerevisiae and S. pombe have ...
Halobacterium salinarum
Although chromosomes are initially shattered into many fragments, complete chromosomes are regenerated by making use of over- ... Whole proteome comparisons show the definite archaeal nature of this halophile with additional similarities to the Gram- ... NRC-1 genome consists of 2,571,010 base pairs on one large chromosome and two mini-chromosomes. The genome encodes 2,360 ... The large chromosome is very G-C rich (68%). High GC-content of the genome increases stability in extreme environments. ...
Archaeoglobus
The Archaeoglobus fulgidus genome is a circular chromosome roughly half the size of E. coli at 2,178,000 base pairs. Although ... Another quarter encodes proteins unique to the archaeal domain. One observation about the genome is that there are many gene ... However, the possibility that the shared presence of these signature proteins in these archaeal lineages is due to lateral gene ... Comparative genomic studies on archaeal genomes provide evidence that members of the genus Archaeoglobus are the closest ...
Archaea
Cell division is controlled in a cell cycle; after the cell's chromosome is replicated and the two daughter chromosomes ... Although research is limited in archaeal quorum sensing, some studies have uncovered LuxR proteins in archaeal species, ... archaeal flagella are synthesized by adding subunits at the base. Archaeal membranes are made of molecules that are distinctly ... discovery of the ARMAN group of archaea Browse any completed archaeal genome at UCSC Comparative Analysis of Archaeal Genomes ( ...
Z curve
Guo FB, Ou HY, Zhang CT (2003). "ZCURVE: a new system for recognizing protein-coding genes in bacterial and archaeal genomes". ... "Origin of replication in circular prokaryotic chromosomes". Environ. Microbiol. 8 (2): 353-61. doi:10.1111/j.1462-2920.2005. ... Zhang R, Zhang CT (2005). "Identification of replication origins in archaeal genomes based on the Z-curve method". Archaea. 1 ( ... "Origin of replication in circular prokaryotic chromosomes". Environmental Microbiology. 8 (2): 353-361. doi:10.1111/j.1462- ...
Provirus
Not only eukaryotic viruses integrate into the genomes of their hosts; many bacterial and archaeal viruses also employ this ... not only refers to a retrovirus but is also used to describe other viruses that can integrate into the host chromosomes, ... Krupovic M, Prangishvili D, Hendrix RW, Bamford DH (2011). "Genomics of bacterial and archaeal viruses: dynamics within the ...
Protein-protein interaction prediction
The conserved neighborhood method is based on the hypothesis that if genes encoding two proteins are neighbors on a chromosome ... of gene pair conservation across nine bacterial and archaeal genomes. The method is most effective in prokaryotes with operons ... The adjacency of these two genes was shown to be conserved across nine different bacterial and archaeal genomes. Classification ...
Viral eukaryogenesis
Further, the viral origins of the modern eukaryotic nucleus may have relied on multiple infections of archaeal cells carrying ... a DNA chromosome encapsulated within a lipid membrane). In theory, a large DNA virus could take control of a bacterial or ... However, this theory is controversial, and additional experimentation involving archaeal viruses is necessary, as they are ... evolved into a nucleus via gene acquisition from existing bacterial and archaeal species. The lysogenic virus then became the ...
Halostagnicola larsenii
The genome consists of 2.79 Mega-bases on a circular chromosome with four circular plasmids. The genome includes 4,246 genes of ... larsenii was sequenced using Illumina dye sequencing HiSeq 2000 by Iain Anderson as part of the Archaeal Tree of Life Project ...
List of MeSH codes (A11)
... chromosomes, archaeal MeSH A11.284.187.178 - chromosomes, artificial MeSH A11.284.187.178.170 - chromosomes, artificial, ... x chromosome MeSH A11.284.187.865.982.500 - chromosomes, human, x MeSH A11.284.187.865.983 - y chromosome MeSH A11.284.187.865. ... chromosomes, human, pair 12 MeSH A11.284.187.520.300.325.680 - chromosomes, human, x MeSH A11.284.187.520.300.370 - chromosomes ... philadelphia chromosome MeSH A11.284.187.520.300.505.757 - chromosomes, human, y MeSH A11.284.187.560 - chromosomes, plant MeSH ...
List of MeSH codes (G05)
... chromosome pairing MeSH G05.105.220.687.500.299.500 - synaptonemal complex MeSH G05.105.220.687.500.600 - pachytene stage MeSH ... archaeal MeSH G05.315.300 - gene expression regulation, bacterial MeSH G05.315.310 - gene expression regulation, developmental ... chromosome pairing MeSH G05.105.220.875.500.299.500 - synaptonemal complex MeSH G05.105.220.875.500.600 - pachytene stage MeSH ... chromosome segregation MeSH G05.105.220.625.620 - nondisjunction, genetic MeSH G05.105.220.687 - meiosis MeSH G05.105.220.687. ...
CRISPR
Certain archaeal viruses were shown to carry mini-CRISPR arrays containing one or two spacers. It has been shown that spacers ... It is the partial repeat sequence that prevents the CRISPR-Cas system from targeting the chromosome as base pairing beyond the ... Francisco Mojica at the University of Alicante in Spain studied repeats observed in the archaeal organisms of Haloferax and ... A subtype of chromosomal islands called phage-inducible chromosomal island (PICI) is excised from a bacterial chromosome upon ...
FANCL
2005). "A Human Orthologue of Archaeal DNA Repair Protein Hef is Defective in Fanconi Anemia Complementation Group M". Nat. ... 2005). "Generation and annotation of the DNA sequences of human chromosomes 2 and 4". Nature. 434 (7034): 724-31. doi:10.1038/ ... at ionizing radiation-induced foci and in synaptonemal complexes of meiotic chromosomes (see Figure: Recombinational repair of ...
Sexual reproduction
The homologous chromosomes pair up so that their DNA sequences are aligned with each other, and this is followed by exchange of ... Exposure of hyperthermophilic archaeal Sulfolobus species to DNA damaging conditions induces cellular aggregation accompanied ... Two rounds of cell division then produce four haploid gametes, each with half the number of chromosomes from each parent cell, ... For a bacterium to bind, take up, and recombine exogenous DNA into its chromosome, it must enter a special physiological state ...
List of examples of convergent evolution
In the evolution of sexual reproduction and origin of the sex chromosome: Mammals, females have two copies of the X chromosome ... Extremely halophile archaeal family Halobacteriaceae and the extremely halophilic bacterium Salinibacter ruber both can live in ... with males have two copies of the Z chromosome (ZZ) and females have one copy of the Z and one copy of the W chromosome (ZW). ... bio.sunyorange.edu, Gender and Sex Chromosomes Strickberger's Evolution, By Brian Keith Hall, Page 188, Benedikt Hallgrímsson, ...
Bacterial genome
This creates quite dynamic genomes, in which DNA can be introduced into and removed from the chromosome. Bacteria have more ... 24% of Thermotoga's 1,877 ORFs and 16% of Aquifex's 1,512 ORFs show high matches to an Archaeal protein, while mesophiles such ... Right now, we have genome sequences from 50 different bacterial phyla and 11 different archaeal phyla. Second-generation ... Conjugation may mediate the transfer of chromosomal sequences by plasmids that integrate into the chromosome. Despite the ...
Great Oxidation Event
... to drive selection in an early archaeal lineage towards eukaryosis. This archaeal ancestor may already have had DNA repair ... cytoskeleton-mediated chromosome movements and emergence of the nuclear membrane. Thus the evolution of eukaryotic sex and ... The detrimental effects of internal ROS (produced by endosymbiont proto-mitochondria) on the archaeal genome could have ... and that this selective pressure drove the evolutionary transformation of an archaeal lineage into the first eukaryotes. ...
Rad50
These findings suggest that eukaryotic Rad50 may be descended from an ancestral archaeal Rad50 protein that served a role in ... Rad50 is a member of the structural maintenance of chromosomes (SMC) family of proteins. Like other SMC proteins, Rad50 ... Stracker TH, Theunissen JW, Morales M, Petrini JH (2005). "The Mre11 complex and the metabolism of chromosome breaks: the ... Cells from these patients showed increased radiosensitity with an impaired response to chromosome breaks. MRN complex ...
Type I topoisomerase
... for chromosome condensation; and to disentangle intertwined DNA during mitosis. This domain assumes a beta(2)-alpha-beta-alpha- ... bacterial and archaeal topoisomerase I, topoisomerase III and reverse gyrase) and type IB (eukaryotic topoisomerase I and ... separating the DNA of daughter chromosomes after DNA replication, and relax DNA. These enzymes have several functions: to ...
Chromosome
Pereira SL, Grayling RA, Lurz R, Reeve JN (November 1997). "Archaeal nucleosomes". Proceedings of the National Academy of ... Chromosomes in humans can be divided into two types: autosomes (body chromosome(s)) and allosome (sex chromosome(s)). Certain ... and two sex chromosomes. This gives 46 chromosomes in total. Other organisms have more than two copies of their chromosome ... see chromosome (genetic algorithm) Genetic genealogy Genealogical DNA test Lampbrush chromosome List of number of chromosomes ...
Histone
Chromosome condensation[edit]. Phosphorylation of H3 at serine 10 (phospho-H3S10). The mitotic kinase aurora B phosphorylates ... Archaeal histone only contains a H3-H4 like dimeric structure made out of the same protein. Such dimeric structures can stack ... Rizzo PJ (Aug 2003). "Those amazing dinoflagellate chromosomes". Cell Research. 13 (4): 215-7. doi:10.1038/sj.cr.7290166. PMID ... Archaeal histones may well resemble the evolutionary precursors to eukaryotic histones.[12] Histone proteins are among the most ...
Sexual reproduction
... and the same number of chromosomes as both parents. For instance, in human reproduction each human cell contains 46 chromosomes ... Exposure of hyperthermophilic archaeal Sulfolobus species to DNA damaging conditions induces cellular aggregation accompanied ... the resulting child will have 23 chromosomes from each parent genetically recombined into 23 chromosome pairs or 46 total. ... Sexual reproduction is a kind of life cycle where generations alternate between cells with a single set of chromosomes (haploid ...
RAD51
condensed chromosome. • nuclear chromosome, telomeric region. • nucleus. • nuclear chromatin. • lateral element. • cytosol. • ... RAD51 family members are homologous to the bacterial RecA, Archaeal RadA and yeast Rad51.[5][6] The protein is highly conserved ... nuclear chromosome. • mitochondrial matrix. • nucleolus. • mitochondrion. • perinuclear region of cytoplasm. • chromatin. • ... condensed nuclear chromosome. • macromolecular complex. Biological process. • regulation of protein phosphorylation. • strand ...
Archaea
Circular chromosomes, similar translation and transcription to Eukarya. Circular chromosomes, unique translation and ... Connections between archaeal cells can also be found between the Archaeal Richmond Mine Acidophilic Nanoorganisms (ARMAN) and ... after the cell's chromosome is replicated and the two daughter chromosomes separate, the cell divides.[154] In the genus ... Top, an archaeal phospholipid: 1, isoprene chains; 2, ether linkages; 3, L-glycerol moiety; 4, phosphate group. Middle, a ...
Korarchaeota
23, www.pnas.org/cgi/doi/10.1073/pnas.0801980105 Guy L, Ettema TJ (2011). "The archaeal 'TACK' superphylum and the origin of ... C content of bacterial chromosomes by monitoring fluorescence intensity during DNA denaturation in a capillary tube". Int. J. ... Barns, SM; Fundyga RE; Jeffries MW; Pace NR (1994). "Remarkable archaeal diversity detected in a Yellowstone National Park hot ... Korarchaeota is regarded as a phylum, which itself is part of the archaeal TACK superphylum which encompasses Thaumarchaeota, ...
Repressor
This causes chromosome looping, allowing the promoter region and the silencer region to come to close proximity. ... Archaeal transcription factor B. Elongation. *bacterial RNA polymerase: rpoB. *eukaryotic RNA polymerase: RNA polymerase II ...
EIF3A
This article on a gene on human chromosome 10 is a stub. You can help Wikipedia by expanding it.. *v ... to human chromosome band 10q26 by in situ hybridisation". Cytogenet. Cell Genet. 83 (1-2): 74-5. doi:10.1159/000015130. PMID ...
EIF4A2
This article on a gene on human chromosome 8 is a stub. You can help Wikipedia by expanding it.. *v ... This article on a gene on human chromosome 3 is a stub. You can help Wikipedia by expanding it.. *v ...
ATP-binding cassette transporter
All of subgroup 2 is organized into a head to tail cluster of chromosomes on chromosome 17q24. Genes in this second subgroup ... ISBN 981-4280-06-2. Classification of ABC transporters in TCDB ABCdb Archaeal and Bacterial ABC Systems database, ABCdb ATP- ... Also, the ABCA4 maps to a region of chromosome 1p21 that contains the gene for Stargardt's disease. This gene is found to be ... The first subgroup consists of seven genes that map to six different chromosomes. These are ABCA1, ABCA2, ABCA3, and ABCA4, ...
Lynn Margulis
Margulis, L (2005). "Hans Ris (1914-2004). Genophore, chromosomes and the bacterial origin of chloroplasts". International ... "Archaeal-eubacterial mergers in the origin of Eukarya: phylogenetic classification of life". Proceedings of the National ...
Amplicon
The sex assay utilizes AluSTXa for the X chromosome, AluSTYa for the Y chromosome, or both AluSTXa and AluSTYa, to reduce the ... which is part of every bacterial and archaeal genome and is highly conserved, bacteria can be taxonomically classified by ... The inserted chromosome yields a large fragment when the homologous region is amplified. The males are distinguished as having ...
Evolution of sexual reproduction
The archaeal host transferred much of its functional genome to the virus during the evolution of cytoplasm, but retained the ... If, in a sexual population, two different advantageous alleles arise at different loci on a chromosome in different members of ... However, should the same two alleles arise in different members of an asexual population, the only way that one chromosome can ... These include a double stranded DNA genome, a linear chromosome with short telomeric repeats, a complex membrane bound capsid, ...
Plant
... and examination of chromosomes in maize allowed Barbara McClintock to demonstrate their connection to inherited traits.[102] ...
Microorganism
Karner, M.B.; DeLong, E.F.; Karl, D.M. (2001). "Archaeal dominance in the mesopelagic zone of the Pacific Ocean". Nature. 409 ( ... Their genome is usually a circular bacterial chromosome - a single loop of DNA, although they can also harbor small pieces of ... DNA (Deoxyribonucleic acid) itself is arranged in complex chromosomes.[58] Mitochondria are organelles vital in metabolism as ... "The archaeal Ced system imports DNA". Proc Natl Acad Sci U S A. 113 (9): 2496-501. Bibcode:2016PNAS..113.2496V. doi:10.1073/ ...
Transfer RNA
These genes are found on all chromosomes, except the 22 and Y chromosome. High clustering on 6p is observed (140 tRNA genes), ... or archaeal counterpart. This initial tRNA binding site is called the A/T site. In the A/T site, the A-site half resides in the ... as well on 1 chromosome.[25]. The HGNC, in collaboration with the Genomic tRNA Database (GtRNAdb) and experts in the field, has ... the existence of the P/I site in eukaryotic or archaeal ribosomes has not yet been confirmed. The P-site protein L27 has been ...
Korarqueotas, a enciclopedia libre
Auchtung Thomas A. (2007) Ecology of the hydrothermal candidate archaeal division, Korarchaeota. PhD thesis, Harvard University ... C content of bacterial chromosomes by monitoring fluorescence intensity during DNA denaturation in a capillary tube". Int. J. ... "Remarkable archaeal diversity detected in a Yellowstone National Park hot spring environment". Proc. Natl. Acad. Sci. USA 91 ... "Perspectives on archaeal diversity, thermophily and monophyly from environmental rRNA sequences". Proc. Natl. Acad. Sci. USA ...
Histone acetylation and deacetylation
As the chromosome is replicated, the modifications that exist on the parental chromosomes are handed down to daughter ... Acetylated histones, octameric proteins that organize chromatin into nucleosomes basic structural unit of the chromosomes and ... For example, the combination of acetylation and phosphorylation have synergistic effects on the chromosomes overall structural ... Archaeal transcription factor B. Elongation. *bacterial RNA polymerase: rpoB. *eukaryotic RNA polymerase: RNA polymerase II ...
Symbiogenesis
Consequently, the chromosomes of many eukaryotes contain genes that originated from the genomes of mitochondria and plastids.[ ... mitochondrion likely included protection of the archaeal host genome from the release of reactive oxygen species (ROS). ROS ... organelle genomes forge eukaryotic chromosomes". Nature Reviews. Genetics. 5 (2): 123-35. doi:10.1038/nrg1271. PMID 14735123. ... organelle genomes forge eukaryotic chromosomes". Nature Reviews. Genetics. 5 (2): 123-35. doi:10.1038/nrg1271. PMID 14735123. ...
Sequence homology
Each Hox cluster (HoxA, HoxB, etc.) is on a different chromosome. For instance, the human HoxA cluster is on chromosome 7. The ... "OrthoDB v9.1: cataloging evolutionary and functional annotations for animal, fungal, plant, archaeal, bacterial and viral ... Homoeologous (also spelled homeologous) chromosomes or parts of chromosomes are those brought together following inter-species ... on human chromosome 6 has paralogy regions on chromosomes 1, 9 and 19.[35] Much of the human genome seems to be assignable to ...
Glutamine synthetase
Brown JR, Masuchi Y, Robb FT, Doolittle WF (June 1994). "Evolutionary relationships of bacterial and archaeal glutamine ... Genes on human chromosome 1. *EC 6.3.1. *Glutamate (neurotransmitter). Hidden categories: *Protein pages needing a picture ...
Extremophile
Extracellular membrane vesicles (MVs) might be involved in DNA transfer between different hyperthermophilic archaeal species.[ ... to transfer DNA from one cell to another cell followed by integration of the donor DNA into the recipient cell's chromosome.[37 ... "Protein adaptations in archaeal extremophiles". Archaea. 2013: 373275. doi:10.1155/2013/373275. PMC 3787623. PMID 24151449 ...
Flowering plant
A key event during meiosis in a diploid cell is the pairing of homologous chromosomes and homologous recombination (the ... exchange of genetic information) between homologous chromosomes. This process promotes the production of increased genetic ...
List of sequenced animal genomes
December 2015). "Insights into Sex Chromosome Evolution and Aging from the Genome of a Short-Lived Fish". Cell. 163 (6): 1527- ... List of sequenced archaeal genomes. *List of sequenced eukaryotic genomes. *List of sequenced fungi genomes ... "Deciphering neo-sex and B chromosome evolution by the draft genome of Drosophila albomicans". BMC Genomics. 13: 109. doi ...
CRISPR
At the same time, repeats were observed in the archaeal organisms of Haloferax and Haloarcula species, and their function was ... It is the partial repeat sequence that prevents the CRISPR-Cas system from targeting the chromosome as base pairing beyond the ... A subtype of chromosomal islands called phage-inducible chromosomal island (PICI) is excised from a bacterial chromosome upon ... "Biogenesis pathways of RNA guides in archaeal and bacterial CRISPR-Cas adaptive immunity". FEMS Microbiology Reviews. 39 (3): ...
Cell nucleus
The distinct chromosome territories of chromosome 2 (red) and chromosome 9 (green) are stained with fluorescent in situ ... The archaeal origin of the nucleus is supported by observations that archaea and eukarya have similar genes for certain ... The mitotic spindle can be seen, stained green, attached to the two sets of chromosomes, stained light blue. All chromosomes ... called chromosome territories.[22] Active genes, which are generally found in the euchromatic region of the chromosome, tend to ...
Silencer (genetics)
... as well as regions that bind to the transcription factors assembled at the promoter of the gene which would create a chromosome ... Archaeal transcription factor B. Elongation. *bacterial RNA polymerase: rpoB. *eukaryotic RNA polymerase: RNA polymerase II ...
Virus - Simple English Wikipedia, the free encyclopedia
In some viruses the viral genome is put by genetic recombination into a specific place in the host's chromosome. The viral ... "Structural and functional studies of archaeal viruses". J. Biol. Chem. 284 (19): 12599-603. doi:10.1074/jbc.R800078200. PMC ...
Shwachman-Diamond syndrome
The gene that is mutated in this syndrome, SBDS,[2][3][4] lies on the long arm of chromosome 7 at cytogenetic position 7q11.[5] ... The atomic structure of an archaeal ortholog of the human protein has been determined by x-ray crystallography and indicates a ... The SBDS gene resides in a block of genomic sequence that is locally duplicated on the chromosome. The second copy contains a ... this interval was refined to a region on the long arm of the chromosome next to the centromere.[12] ...
Virus
Archaeal viruses. Some viruses replicate within archaea: these are double-stranded DNA viruses with unusual and sometimes ... lysogenic cycle where the viral genome is incorporated by genetic recombination into a specific place in the host's chromosome ... Structural and functional studies of archaeal viruses. The Journal of Biological Chemistry. 2009;284(19):12599-603. doi:10.1074 ... Other archaeal viruses resemble the tailed bacteriophages, and can have multiple tail structures.[89] ...
Chromosomes, Archaeal | Profiles RNS
Archaeal" by people in this website by year, and whether "Chromosomes, Archaeal" was a major or minor topic of these ... "Chromosomes, Archaeal" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical ... Below are the most recent publications written about "Chromosomes, Archaeal" by people in Profiles. ... Below are MeSH descriptors whose meaning is more general than "Chromosomes, Archaeal". ...
Samson RY[au] - PubMed - NCBI
Archaeal chromosome biology.. Samson RY, Bell SD.. J Mol Microbiol Biotechnol. 2014;24(5-6):420-7. doi: 10.1159/000368854. Epub ... Specificity and function of archaeal DNA replication initiator proteins.. Samson RY, Xu Y, Gadelha C, Stone TA, Faqiri JN, Li D ... Archaeal chromatin proteins histone HMtB and Alba have lost DNA-binding ability in laboratory strains of Methanothermobacter ... Molecular and structural basis of ESCRT-III recruitment to membranes during archaeal cell division. ...
MMP0675 - Conserved hypothetical archaeal protein - Methanococcus maripaludis (strain S2 / LL) - MMP0675 gene & protein
Chromosome ... Ensembl bacterial and archaeal genome annotation project. More ... Conserved hypothetical archaeal proteinImported. ,p>Information which has been imported from another database using automatic ... tr,Q6LZF4,Q6LZF4_METMP Conserved hypothetical archaeal protein OS=Methanococcus maripaludis (strain S2 / LL) OX=267377 GN= ...
Activation of archaeal transcription by recruitment of the TATA-binding protein | PNAS
Archaea, like bacteria, contain proteins that compact their chromosomes. The methanogenic euryarchaea, which include M. ... The core components of archaeal transcription closely resemble those of eukaryotic RNA polymerase II (1). Archaeal promoters ... Activation of archaeal transcription by recruitment of the TATA-binding protein. Mohamed Ouhammouch, Robert E. Dewhurst, ... Activation of archaeal transcription by recruitment of the TATA-binding protein. Mohamed Ouhammouch, Robert E. Dewhurst, ...
Regulated polyploidy in halophilic archaea
... but it is generally assumed that most prokaryotes contain a single copy of a circular chromosome and are therefore monoploid. ... Chromosomes, Archaeal * DNA Primers / genetics * DNA, Archaeal / analysis * DNA, Archaeal / genetics * Escherichia coli / ... The chromosome copy number is identical in cultures with a twofold lower growth rate, in contrast to the results reported for ... Fast growing H. salinarum cells contain on average about 25 copies of the chromosome in exponential phase, and their ploidy is ...
NUF2 NUF2 component of NDC80 kinetochore complex [Homo sapiens (human)] - Gene - NCBI
SMC_prok_A; chromosome segregation protein SMC, primarily archaeal type. pfam03800. Location:3 → 146. Nuf2; Nuf2 family. ... SMC_prok_A; chromosome segregation protein SMC, primarily archaeal type. pfam03800. Location:3 → 146. Nuf2; Nuf2 family. ... SMC_prok_A; chromosome segregation protein SMC, primarily archaeal type. pfam03800. Location:1 → 100. Nuf2; Nuf2 family. ... SMC_prok_A; chromosome segregation protein SMC, primarily archaeal type. pfam03800. Location:3 → 146. Nuf2; Nuf2 family. ...
Characterization and Functional Complementation of a Nonlethal Deletion in the Chromosome of a β-Glycosidase Mutant of...
General vectors for archaeal hyperthermophiles: strategies based on a mobile intron and a plasmid. FEMS Microbiol. Rev.18:93- ... The chromosomes of the three mutant isolates were analyzed for the presence of mobile elements or deletion of the lacS gene by ... The recent availability of the Sulfolobus solfataricus P2 genome (36), as well as other archaeal genome sequences (8, 11, 14, ... A 1,250-bp EcoRI fragment from the mutant GθW chromosome, supposed to contain the 5′ joining end of the deletion, was isolated ...
Toxin-antitoxin loci are highly abundant in free-living but lost from host-associated prokaryotes
Prokaryotic chromosomes code for toxin-antitoxin (TA) loci, often in multiple copies. In E.coli, experimental evidence ... Chromosome Mapping * Enterobacteriaceae / genetics * Genes, Archaeal* * Genes, Bacterial* * Integrons * Interspersed Repetitive ... Prokaryotic chromosomes code for toxin-antitoxin (TA) loci, often in multiple copies. In E.coli, experimental evidence ... These observations strongly suggest that TA loci are mobile cassettes that move frequently within and between chromosomes and ...
mukF - Chromosome partition protein MukF - Escherichia coli (strain K12) - mukF gene & protein
May participate in facilitating chromosome segregation by condensation DNA from both sides of a centrally located replisome ... Involved in chromosome condensation, segregation and cell cycle progression. ... Ensembl bacterial and archaeal genome annotation project. More...EnsemblBacteriai. AAC74008; AAC74008; b0922. BAA35668; ... Involved in chromosome condensation, segregation and cell cycle progression. May participate in facilitating chromosome ...
Genome - Wikipedia
Samson RY, Bell SD (2014). "Archaeal chromosome biology". Journal of Molecular Microbiology and Biotechnology. 24 (5-6): 420-27 ... Eukaryotic genomes are composed of one or more linear DNA chromosomes. The number of chromosomes varies widely from Jack jumper ... The Bacterial Chromosome: 525-540. doi:10.1128/9781555817640.ch29. ISBN 9781555812324. "Bacterial Chromosomes". Microbial ... A genome sequence is the complete list of the nucleotides (A, C, G, and T for DNA genomes) that make up all the chromosomes of ...
The DNA-binding protein HTa from Thermoplasma acidophilum is an archaeal histone analog | eLife
Unfortunately, the manuscript fails to resolve impactful questions of archaeal biology, chromosome organization, or the ... Transcription by an archaeal RNA polymerase is slowed but not blocked by an archaeal nucleosome * Y Xie ... Unfortunately, the manuscript fails to resolve impactful questions of archaeal biology, chromosome organization, or the ... Chromosomes and Gene Expression Translational initiation in E. coli occurs at the correct sites genome-wide in the absence of ...
Synthetically modified guide RNA and donor DNA are a versatile platform for CRISPR-Cas9 engineering | eLife
The kinetochore and the origin of eukaryotic chromosome segregation | PNAS
FECA, by consensus, represents the final branching from the archaeal linage leading to eukaryotes; evidence indicates that this ... Crosstalk regulation between bacterial chromosome replication and chromosome partitioning. Front. Microbiol. 10, 279 (2019).. ... Caulobacter chromosome segregation is an ordered multistep process. Proc. Natl. Acad. Sci. U.S.A. 107, 14194-14198 (2010).. ... The bacterial chromosome: Architecture and action of bacterial SMC and SMC-like complexes. FEMS Microbiol. Rev. 38, 380-392 ( ...
Genetic Analysis: An Integrated Approach, Global Edition - Mark F. Sanders - 9781292092362 - Biology - Genetics (111)
11.5 Chromatin Organizes Archaeal Chromosomes Case Study Fishing for Chromosome Abnormalities in Cancer Cells ... 13.4 Chromosome Breakage Leads to Inversion and Translocation of Chromosomes 13.5 Transposable Genetic Elements Move throughout ... 3.3 The Chromosome Theory of Heredity Proposes That Genes Are Carried on Chromosomes ... 13.3 Chromosome Breakage Causes Mutation by Loss, Gain, and Rearrangement of Chromosomes ...
Frontiers | Archaeal Persisters: Persister Cell Formation as a Stress Response in Haloferax volcanii | Microbiology
... this is potentially due to structural differences between bacterial and archaeal signals, and does not discount a quorum ... this is potentially due to structural differences between bacterial and archaeal signals, and does not discount a quorum ... TABLE 1. Toxin-antitoxin loci identified on Haloferax volcanii DS2 chromosome and plasmids. ... Archaeal Persisters: Persister Cell Formation as a Stress Response in Haloferax volcanii. Julianne Megaw and Brendan F. Gilmore ...
Impaired chromosome partitioning and synchronization of DNA replication initiation in an insertional mutant in the Vibrio...
Protein-protein interactions in the archaeal core replisome Biochem Soc Trans (January, 2011) ... non-partitioned or rarely partitioned chromosomes. Such a phenotype suggests impairment of the mechanism of chromosome ... Impaired chromosome partitioning and synchronization of DNA replication initiation in an insertional mutant in the Vibrio ... Moreover, in contrast to wild-type V. harveyi, inhibition of chromosome replication and/or of cell division in the mutant ...
The Archaeal Molecular Chaperone Machine: Peculiarities and Paradoxes | Genetics
... and by the variable location of the grpE gene in the chromosome. In the archaea investigated, grpE is part of the hsp70(dnaK) ... The archaeal Hsp70(DnaK) is a bacterial protein: All the archaeal Hsp70(DnaK) molecules sequenced and studied thus far resemble ... Does the archaeal chaperone machine interact with the TRiC-like thermosome? Does the archaeal machine interact with another ... 1995 The archaeal dnaK-dnaJ gene cluster: organization and expression in the methanogen Methanosarcina mazei. J. Mol. Biol. 250 ...
Publications - Universität Ulm
She Q, Peng X, Zillig W, Garrett RA (2001) Gene capture in archaeal chromosomes. Nature 409(6819): 478. ... 2012) An archaeal immune system can detect multiple protospacer adjacent motifs (PAMs) to target invader DNA. J Biol Chem. 287 ... Lillestøl RK, Redder P, Garrett RA, Brugger K (2006) A putative viral defence mechanism in archaeal cells. Archaea 2(1): 59-72 ... An archaeal CRISPR type III-B system exhibiting distinctive RNA targeting features and mediating dual RNA and DNA interference ...
Evolution and function of bacterial and archaeal genome sequences | Frontiers Research Topic
The variations in bacterial and archaeal genome DNA sequences are not only explained by neutral mutations. The restriction- ... The plasmid DNA has lower GC content than its host chromosome DNA does. Most of the differences in GC content between plasmids ... I am interested in the relation between bacterial (or archaeal) genome sequence and their functions. I welcome investigators to ... Therefore, virus resistance systems have resulted in changes in bacterial and archaeal genome DNA sequences during evolution. ...
Archaeal ancestry of eukaryotes | Philosophical Transactions of the Royal Society B: Biological Sciences
2007 The origin of mitochondria in light of a fluid prokaryotic chromosome model. Biol. Lett. 3, 180-184. (doi:10.1098/rsbl. ... 4. The scattered archaeal eukaryome. *5. The archaeal ancestor of eukaryotes: a complex, ancient group within the TACK ... 2. Burgeoning archaeal diversity, complex archaeal ancestor and origin of eukaryotes from within the archaea. As pointed out ... 2014 The dispersed archaeal eukaryome and the complex archaeal ancestor of eukaryotes. Cold Spring Harb. Perspect. Biol. 6, ...
Key similarities discovered between human and archaea chromosomes
A study led by Indiana University is the first to reveal key similarities between chromosomes in humans and archaea. The work ... The IU study is the first to visualize the organization of DNA in archaeal chromosomes. The key similarity is the way in which ... The similar clustering of DNA in humans and archaeal chromosomes is significant because certain genes activate or deactivate ... Key similarities discovered between human and archaea chromosomes Discovery from Indiana University could advance use of single ...
Frontiers | DNA replication origins in archaea | Microbiology
Moreover, comparative genomic analyses have revealed that the mosaics of replicator-initiator pairings in archaeal chromosomes ... Moreover, comparative genomic analyses have revealed that the mosaics of replicator-initiator pairings in archaeal chromosomes ... Archaea, the third domain of life, use a single or multiple origin(s) to initiate replication of their circular chromosomes. ... Archaea, the third domain of life, use a single or multiple origin(s) to initiate replication of their circular chromosomes. ...
Archaeal integrases and mechanisms of gene capture | Biochemical Society Transactions
Archaeal integrases facilitate the formation of two distinctive types of integrated element within archaeal chromosomes: the ... Two mechanisms have been proposed for stably maintaining an integrated element within archaeal chromosomes. There is also ... Archaeal integrases and mechanisms of gene capture. Q. She, B. Shen, L. Chen ... Archaeal integrases and mechanisms of gene capture Message Subject (Your Name) has forwarded a page to you from Biochemical ...
Selection for Chromosome Architecture in Bacteria | SpringerLink
Bacterial chromosomes are immense polymers whose faithful replication and segregation are crucial to cell survival. The ability ... Zhang R, Zhang CT (2005) Identification of replication origins in archaeal genomes based on the Z-curve method. Archaea 1:335- ... Lobry JR, Louarn JM (2003) Polarisation of prokaryotic chromosomes. Curr Opin Microbiol 6:101-108CrossRefPubMedGoogle Scholar ... Liu SL, Sanderson KE (1995a) The chromosome of Salmonella paratyphi A is inverted by recombination between rrnH and rrnG. J ...
Viral Eukaryogenesis: Was the Ancestor of the Nucleus a Complex DNA Virus? | SpringerLink
This redundancy allowed loss of the archaeal chromosome, generating an organism with eukaryotic features. The evolution of ... The coevolution of phagocytosis and the nucleus rendered much of the host archaeal genome redundant since the protoeukaryote ... These include mRNA capping, linear chromosomes, and separation of transcription from translation. In the model, phagocytosis ...
Microbial genetics - Wikipedia
Archaeal Genetics is the study of genes that consist of single nucleus-free cells. Archaea have a single, circular chromosomes ... Archaeal chromosomes replicate from different origins of replication, producing two haploid daughter cells. " They share a ... "Archaeal genetics - Latest research and news , Nature". www.nature.com. "Archaeal Genetics , Boundless Microbiology". courses. ... Even though archaeal cells have cells walls, they do not contain peptidoglycan, which means archaea do not produce cellulose or ...
Life on Earth
Comparison of archaeal and bacterial genomes: computer analysis of protein sequences predicts novel functions and suggests a ... Mosaic bacterial chromosomes: a challenge on route to a tree of genomes. BioEssays 21:99-104. ... Archaeal-eubacterial mergers in the origin of Eukarya: phylogenetic classification of life. Proceedings of the Natural Academy ... At present, STSV1 is the largest archaeal virus that has been isolated and studied. Its genome sequence has been sequenced. ...
Chromosome : Wikis (The Full Wiki)
Sandman K, Reeve JN (2000). "Structure and functional relationships of archaeal and eukaryal histones and nucleosomes". Arch. ... Human chromosomes. .Chromosomes can be divided into two types--autosomes, and sex chromosomes.^ Autosome A chromosome not ... There are 23 chromosomes from the mother and a "Y" chromosome from a father.. * Chromosomes, Somatids, and the Blood of Christ ... Chromosome numbers in other organisms. Species. Large. Chromosomes. Intermediate. Chromosomes. Microchromosomes. Trypanosoma ...
Initiation of DNA Replication in the Archaea | Springer for Research & Development
Organisms within the archaeal domain of life possess a simplified version of the eukaryotic DNA replication machinery. While ... Extrachromosomal element capture and the evolution of multiple replication origins in archaeal chromosomes. Proc Natl Acad Sci ... Sherratt DJ (2003) Bacterial chromosome dynamics. Science 301(5634):780-785CrossRefPubMedGoogle Scholar ... Organisms within the archaeal domain of life possess a simplified version of the eukaryotic DNA replication machinery. While ...
MED: a new non-supervised gene prediction algorithm for bacterial and archaeal genomes | BMC Bioinformatics | Full Text
... the EasyGene web server has provided predictions for hundreds of chromosomes. Therefore, for comparison purpose, EasyGene ... Furthermore, MED 2.0 adapts to a broad range of archaeal genome as well as to bacterial genomes. For archaeal genomes with more ... The bacterial and archaeal genomes and their annotations used in this paper were downloaded from the GenBank Release 149.0 in ... We present the logos of three representative archaeal genomes: M. jannaschii, P. abyssi, and N. equitans in Fig. 2. The logos ...
GenomesGenesArchaeaProteinsEukaryotesGeneSpeciesSequencesPlasmids and chromosomesProteinRecombinationHost chromosomesCircular chromosomesProkaryotic chromosomesOrganismGeneticsBacteriaMitosisMeiosisDeveloped the chromosome theory of iPlasmidHomologous chromosomesRole in chromosome segregationMethanococcusDiploidOriginsLineagesLinear chromosomesDaughter chromosomesBacterial chromosomesCellsFacilitating chromosome segregationMechanismsReplication originPhylogeneticHistones2016StructuresSulfolobusCondensationInitiationComplete genomeCellularCrenarchaeotaPMIDStablyMetaphaseFaithful replicationHistoneInstability
Genomes22
- On the other hand, all archaeal genomes sequenced to date encode potential transcription regulators of bacterial type, underscoring the chimeric nature of the archaeal transcription apparatus ( 6 , 7 ). (pnas.org)
- A genome sequence is the complete list of the nucleotides (A, C, G, and T for DNA genomes) that make up all the chromosomes of an individual or a species. (wikipedia.org)
- If the DNA is replicated faster than the bacterial cells divide, multiple copies of the chromosome can be present in a single cell, and if the cells divide faster than the DNA can be replicated, multiple replication of the chromosome is initiated before the division occurs, allowing daughter cells to inherit complete genomes and already partially replicated chromosomes. (wikipedia.org)
- There is also evidence for changes having occurred in the captured integrated elements present in archaeal genomes. (biochemsoctrans.org)
- The ability of proteins such as FtsK to move unidirectionally toward the replication terminus, and direct DNA translocation into the appropriate daughter cell during cell division, requires that bacterial genomes maintain an architecture for the orderly replication and segregation of chromosomes. (springer.com)
- The advantage of the MED 2.0 is particularly evident for GC-rich genomes and archaeal genomes. (biomedcentral.com)
- In particular, MED 2.0 is shown to reveal divergent translation initiation mechanisms in archaeal genomes while making a more accurate prediction of TISs compared to the existing gene finders and the current GenBank annotation. (biomedcentral.com)
- At the time of this writing nearly 400 complete prokaryotic genomes, including 28 archaeal ones, have been deposited in the GenBank database. (biomedcentral.com)
- The Z-curve method has been used in the identification of replication origins in archaeal genomes successfully since 2002. (deepdyve.com)
- Furthermore, the Web servers of Ori-Finder and Ori-Finder 2 have been developed to predict replication origins in both bacterial and archaeal genomes based on the Z-curve method, and the replication origins with manual curation have been collected into an online database, DoriC. (deepdyve.com)
- In eukaryote, because of the huge size of genomes, the chromosomes use multiple dispersed replication origins to initiate the DNA replication, ranging from hundreds in yeast to tens of thousands in human [8-10]. (deepdyve.com)
- These results led us to apply information theoretical methods to examine the extent to which information content differed between the genomes of bacterial chromosomes, plasmids, phages and GIs, and whether such differences could be related to distinct genomic properties of bacterial chromosomes and mobile genomic elements. (biomedcentral.com)
- All sequenced archaeal genomes to date have at least two TA loci and the thermophilic archaeon Sulfolobus tokodaii has »40 TA loci. (springer.com)
- One of the obstacles clouding our view of these early cells from a comparative approach is the large number of conserved hypothetical genes present in Archaeal and Eukaryote genomes whose cellular functions are unknown. (nasa.gov)
- Broad estimates for coverage depths needed to recover complete bacterial genomes are present in the literature, but required sequencing depths across bacterial and archaeal phylogenies needed for high-quality assembly are not known. (unl.edu)
- We first preface our research by discussing the benefits and challenges surrounding assembly of single chromosome bacterial genomes. (unl.edu)
- We apply this approach to two synthetic metagenome samples, successfully clustering the genome content of fungal, bacterial, and archaeal species with more than 99% agreement with published reference genomes. (g3journal.org)
- We developed an automated computational pipeline for identification of r-protein genes and applied it to 995 completely sequenced bacterial and 87 archaeal genomes available in the RefSeq database. (pubmedcentralcanada.ca)
- Systematic analysis of gene neighborhoods shows that ribosomal superoperons are the largest partially conserved gene arrays in bacterial and archaeal genomes [10] , [11] . (pubmedcentralcanada.ca)
- Briefly, position-specific scoring matrices (PSSMs) for 56 bacterial and 71 archaeal r-proteins [6] , [7] ( Table S1 ) were used to screen completely sequenced prokaryotic genomes ( Table S2 ) translated in six frames. (pubmedcentralcanada.ca)
- In search of systematic evidence of accelerated evolution after duplication, we used data from 26 bacterial, six archaeal, and seven eukaryotic genomes to compare the mode and strength of selection acting on recently duplicated genes (paralogs) and on similarly diverged, unduplicated orthologous genes in different species. (biomedcentral.com)
- Many archaeal genomes consist of multiple parts-the main chromosome plus several megaplasmids-and in polyploid species these parts are present in multiple copies. (nottingham.ac.uk)
Genes30
- In contrast, analysis of the methyl coenzyme M reductase operon of M. kandleri identified a group of genes unique to archaeal methanogens ( 15 ). (pnas.org)
- Comparative genome analysis of M. kandleri , Methanococcus jannaschii , and Methanothermobacter thermoautotrophicum resulted in the delineation of a distinct set of genes characteristic of archaeal methanogens. (pnas.org)
- Another archaeal paradox is that the proteins coded by these genes are very similar to bacterial homologs, as if the genes had been received via lateral transfer from bacteria, whereas the upstream flanking regions have no bacterial markers, but instead have typical archaeal promoters, which are like those of eukaryotes. (genetics.org)
- Third, phylogenomic analyses converge on the origin of most eukaryotic genes of archaeal descent from within the archaeal evolutionary tree, specifically, the TACK superphylum. (royalsocietypublishing.org)
- Fourth, evidence has been presented that the origin of the major archaeal phyla involved massive acquisition of bacterial genes. (royalsocietypublishing.org)
- The similar clustering of DNA in humans and archaeal chromosomes is significant because certain genes activate or deactivate based upon how they're folded. (newswise.com)
- a researcher at the University of Minnesota College of Biological Sciences discovered that the linear arrangement of genes on a chromosome corresponds to the development of body segments in fruit flies ? (thefullwiki.org)
- The uptake of donor DNA and its recombinational incorporation into the recipient chromosome depends on the expression of numerous bacterial genes whose products direct this process. (wikipedia.org)
- E. coli conjugation is mediated by expression of plasmid genes, whereas mycobacterial conjugation is mediated by genes on the bacterial chromosome. (wikipedia.org)
- Chromosomes contain a single continuous piece of DNA, which contains many genes , regulatory elements and other nucleotide sequences . (bionity.com)
- The unique fraction of marine archaeal genes included, among others, those for a predicted RNA-binding protein of the bacterial cold shock family and a eukaryote-type Zn finger protein. (asm.org)
- In H. salinarum , the B flagellin genes are adjacent to the accessory genes, whereas the A flagellin genes are located elsewhere on the chromosome. (els.net)
- Homologous recombination is a fundamental cellular process that rearranges genes both within and between chromosomes, promotes repair of damaged DNA and underpins replication. (portlandpress.com)
- We also identified a novel staphylococcal cassette chromosome (SCC) mec V subtype harboring clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated genes ( cas ). (cdc.gov)
- Since then it has become evident that TA genes are highly abundant on both plasmids and chromosomes belonging to the bacterial and archaeal domains. (springer.com)
- For such reasons, when it comes to discussing the relationships among all living things, that is, including the microbes and all of their genes rather than just one or a select few, many biologists are now beginning to talk about networks rather than trees in the context of evolutionary relationships among microbial chromosomes. (royalsocietypublishing.org)
- Genes encoding restriction-modification (R-M) systems are present on approximately 90% of currently available bacterial and archaeal genome sequences ( 1 ). (asm.org)
- These systems can be encoded by genes on plasmids or chromosomes, and their general role is to recognize and target invading foreign DNA with restriction enzymes, while simultaneously protecting the host's DNA by methyltransferase (MTase) activity. (asm.org)
- The archaeal RNA polymerase III promoter consensus box A motif, the tRNA half genes (red) and intervening reverse complementary sequences are indicated. (panspermia.org)
- Geneticists from Yale and Germany have shown that four genes thought to be lacking in an archaeal parasite are actually present there in widely separated fragments. (panspermia.org)
- Now, the new analysis has found the four missing genes in the form of "nine tRNA halves spread throughout the chromosome. (panspermia.org)
- In animals, genes encoding canonical histones are typically clustered along the chromosome, lack introns and use a stem loop structure at the 3' end instead of a polyA tail. (wikipedia.org)
- Phyletic patterns of bacterial and archaeal r-protein genes were mapped to phylogenetic trees reconstructed from concatenated alignments of r-proteins to reveal the history of likely multiple independent gains and losses. (pubmedcentralcanada.ca)
- In addition to its mtDNA formed of hundreds of circular chromosomes, genes are fragmented. (umontreal.ca)
- The standard 'tree of life', based initially on the sequences of 16S rRNA and subsequently on the sequences of other universal genes, such as protein components of the translation and transcription systems, unequivocally identifies the ancestry of the information-processing systems of eukaryotes as archaeal. (biomedcentral.com)
- The work published in the Journal of the National Cancer Institute reports that the loss of function in certain genes of the sex-determining Y chromosome may play a role in this. (frontlinegenomics.com)
- Phylogenetic analyses of two 'archaeal' genes in thermotoga maritima reveal multiple transfers between archaea and bacteria. (genomenewsnetwork.org)
- The genome sequence of Thermotoga maritima revealed that 24% of its open reading frames (ORFs) showed the highest similarity scores to archaeal genes in BLAST analyses. (genomenewsnetwork.org)
- Here we screened 16 strains from the genus Thermotoga and other related Thermotogales for the occurrence of two of these 'archaeal' genes: the gene encoding the large subunit of glutamate synthase (gltB) and the myo-inositol 1P synthase gene (ino1). (genomenewsnetwork.org)
- Phylogenetic analysis of the ino1 sequences revealed three highly supported prokaryotic clades, all containing a mixture of archaeal and bacterial sequences, and suggested that all bacterial ino1 genes had been recruited from archaeal donors. (genomenewsnetwork.org)
Archaea20
- Archaea and most bacteria have a single circular chromosome, however, some bacterial species have linear or multiple chromosomes. (wikipedia.org)
- It is important to remark, however, that becoming acquainted with what is known for archaea is extremely useful not only for deciding what to do- and how to do it-to increase our understanding of the archaeal chaperoning systems, but also for discovering new molecules and mechanisms that will enhance research with bacteria and eukaryotes. (genetics.org)
- Origin of eukaryotes from within archaea, archaeal eukaryome and bursts of gene gain: eukaryogenesis just made easier? (royalsocietypublishing.org)
- Newswise - A study led by researchers at Indiana University is the first to find similarities between the organization of chromosomes in humans and archaea. (newswise.com)
- Archaea, the third domain of life, use a single or multiple origin(s) to initiate replication of their circular chromosomes. (frontiersin.org)
- While some archaea possess a bacterial-like mode of DNA replication with single origins of replication per chromosome, the majority of species characterized to date possess chromosomes with multiple replication origins. (springer.com)
- Analysis of the predicted gene products encoded by the 74A4 sequence and those derived from a temperate, deepwater planktonic crenarchaeote (fosmid 4B7) revealed many typical archaeal proteins but also several proteins that so far have not been detected in archaea. (asm.org)
- The archaeal flagellum is a unique, 'tail‐like' structure used for motility by single‐celled organisms belonging to the domain Archaea. (els.net)
- In some archaea, single chromosome could adopt more than one oriCs in initiation of DNA replication as eukaryotes. (deepdyve.com)
- Since most archaeal species are extremophilic and difficult to cultivate, current knowledge of recombination in the Archaea is confined largely to comparative genomics and biochemistry. (portlandpress.com)
- Research on the metabolism of extremophilic bacteria ( Thermotoga, Caldicellulosiruptor ) and archaea ( Pyrococcus, Thermococcus ) has been ongoing for many years, and focused on their sugar catabolism, central metabolic pathways, hydrogen production and archaeal lipid biosynthesis. (wur.nl)
- Whilst archaea have eukaryal-type informational pathways such as DNA replication and transcription, archaeal DNA repair pathways are still poorly understood. (biomedcentral.com)
- Archaeal and bacterial ribosomes contain more than 50 proteins, including 34 that are universally conserved in the three domains of cellular life (bacteria, archaea, and eukaryotes). (pubmedcentralcanada.ca)
- Although it is well accepted that archaea are not only the extremists they were thought to be as they occupy nearly every habitat where also bacteria are found, it is surprising how little molecular details are known about archaeal biofilm formation. (scoop.it)
- Unlike bacteria, archaea may have multiple origins per chromosome and multiple Orc1/Cdc6 initiator proteins. (nottingham.ac.uk)
- The latest striking discovery made by deep metagenomic sequencing vindicates this hypothesis by showing that in phylogenetic trees eukaryotes fall within a newly identified archaeal group, the Lokiarchaeota, which combine several eukaryotic signatures previously identified in different archaea. (biomedcentral.com)
- Eukaryotes are organisms that have DNA in the form of chromosomes in a nucleus-they include all known living things except eubactearia and archaea. (phys.org)
- Over the past several years, researchers have been studying the relationship between eukaryotes and Archaea and the Archaeal tree and have discovered that there is a superphylum called Asgard. (phys.org)
- Database searches revealed that three other bacteria-Dehalococcoides ethenogenes, Sinorhizobium meliloti, and Clostridium difficile-possess archaeal-type gltBs, and the phylogenetic analyses confirmed at least two lateral gene transfer (LGT) events between Bacteria and Archaea. (genomenewsnetwork.org)
- These LGT events were also strongly supported by gene structure data, as the three domains in bacterial-type gltB are homologous to three independent ORFs in Archaea and Bacteria with archaeal-type gltBs. (genomenewsnetwork.org)
Proteins17
- Specificity and function of archaeal DNA replication initiator proteins. (nih.gov)
- However, genome comparisons indicate that, in both trees constructed using concatenated alignments of ribosomal proteins and trees based on gene content, M. kandleri consistently groups with other archaeal methanogens. (pnas.org)
- Chromatin The network of chromosomes, histones, and other proteins found in the eukaryotic nucleus during interphase. (thefullwiki.org)
- Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions. (thefullwiki.org)
- Bell SD (2012) Archaeal orc1/cdc6 proteins. (springer.com)
- Chromosomes are organized structures of DNA and proteins that are found in cells . (bionity.com)
- In eukaryotes, nuclear chromosomes are packaged by proteins into a condensed structure called chromatin . (bionity.com)
- The simplest chromosomes are found in viruses: these DNA or RNA molecules are short linear or circular chromosomes that often lack any structural proteins. (bionity.com)
- There are no clear archaeal homologues of either bacterial LexA or of eukaryal proteins involved in the transcriptional response to DNA damage, such as p53. (biomedcentral.com)
- During mitosis and meiosis, the condensed chromosomes are assembled through interactions between nucleosomes and other regulatory proteins. (wikipedia.org)
- In order to derive comprehensive sets of bacterial and archaeal r-proteins, we developed a two-step procedure that is schematically shown in Figure 1 (see Methods for details). (pubmedcentralcanada.ca)
- Archaeal origins are sequence‐based, as in bacteria, but are bound by initiator proteins that share homology with the eukaryotic origin recognition complex subunit Orc1 and helicase loader Cdc6). (nottingham.ac.uk)
- We use protein crystallography to determine the atomic structure of eukaryotic and archaeal proteins involved in these processes. (trieste.it)
- Deregulation of mini-chromosome maintenance (MCM) proteins is associated with genomic instability and cancer. (rcsb.org)
- Resolution of multimeric forms of circular plasmids and chromosomes is mediated by site-specific recombination, and the enzymes that catalyze this type of reaction fall into two families of proteins: the serine and tyrosine recombinase families. (asmscience.org)
- Most eukaryotic chromosomes include packaging proteins which, aided by chaperone proteins , bind to and condense the DNA molecule to prevent it from becoming an unmanageable tangle. (th.ai)
- Here I review three recently characterised non-core archaeal PCNA binding proteins NusS, NreA/NreB and TIP, highlighting what is known of their interactions with PCNA and their functions in vivo and in vitro. (st-andrews.ac.uk)
Eukaryotes12
- Polyploidy is common in higher eukaryotes, especially in plants, but it is generally assumed that most prokaryotes contain a single copy of a circular chromosome and are therefore monoploid. (nih.gov)
- It is difficult to understand how these hybrid characteristics of the archaeal chaperoning system became established and work, if one bears in mind the classical ideas learned from studying bacteria and eukaryotes. (genetics.org)
- The discovery of this 'dispersed eukaryome' implies that the archaeal ancestor of eukaryotes was a complex cell that might have been capable of a primitive form of phagocytosis and thus conducive to endosymbiont capture. (royalsocietypublishing.org)
- Chromosomes of higher organisms ( eukaryotes ) contain DNA and protein. (thefullwiki.org)
- Guy L, Ettema TJ (2011) The archaeal 'TACK' superphylum and the origin of eukaryotes. (springer.com)
- for example mitochondria in most eukaryotes and chloroplasts in plants have their own small chromosomes. (bionity.com)
- This selective pressure drove the transformation of an archaeal (archaebacterial) lineage into the first eukaryotes. (pubmedcentralcanada.ca)
- The Crenarchaea are one of the major lineages with in the Archaeal domain with close ties in function to the cellular biology of Eukaryotes. (nasa.gov)
- A difference at the ultrastructural level appears as formation of meiosis-specific synaptonemal complexes (SCs), the ultrastructures that join homologous chromosomes into bivalents during pachytene stage of meiotic prophase I in the vast majority of eukaryotes. (hindawi.com)
- Archaeal information processing pathways resemble those in eukaryotes, but archaeal damage response pathways remain poorly understood. (biomedcentral.com)
- These findings inspired the hypothesis that the archaeal ancestor of eukaryotes was an unusually complex form with an elaborate intracellular organization. (biomedcentral.com)
- The findings of the closest Archaeal relative to eukaryotes cultures so far will allow further detailed cellular and metabolic investigation and find out more about the origins of complex life. (frontlinegenomics.com)
Gene14
- analysis of its chromosome revealed the total absence of the β-glycosidase gene ( lacS ). (asm.org)
- These mutants contained a transposable element in the lacS gene with features typical of bacterial and archaeal ISs, including terminal inverted repeats, a putative transposase gene, and short direct flanking repeats. (asm.org)
- The Oxford Dictionary suggests the name is a blend of the words gene and chromosome. (wikipedia.org)
- Moreover, in contrast to wild-type V. harveyi , inhibition of chromosome replication and/or of cell division in the mutant bacteria caused significant increase in the number of large cells, suggesting that the cgtA gene product may be involved in the coupling of cell growth to chromosome replication and cell division. (portlandpress.com)
- 1998. Evidence for massive gene exchange between archaeal and bacterial hyperthermophiles. (tolweb.org)
- microchromosomes are very tiny gene -rich chromosomes which are a typical genetic component in birds , and some groups of non-mammalian animals? (thefullwiki.org)
- The stable gradient of AIMS abundance from replication origin to terminus suggests that the replicore acts as a target of selection, where selection for chromosome architecture results in the maintenance of gene order and in the lack of high-frequency DNA inversion within replicores. (springer.com)
- The protective roles of Dps are most likely achieved through a combination of functions associated with the protein-DNA binding and chromosome compaction, metal chelation, ferroxidase activity, and regulation of gene expression. (asm.org)
- Recent advances in genomic sequencing techniques and the development of methods for cloning large genome fragments into fosmid ( 35 , 41 , 42 , 45 ) or bacterial artificial chromosome ( 5 , 6 , 38 ) vectors now provide the means to characterize the gene content ( 41 ), metabolic potential ( 5 ), and population genetics ( 41 ) of uncultivated microorganisms, otherwise known solely by an rRNA sequence. (asm.org)
- Organization of flagella gene families in selected archaeal species. (els.net)
- The essential gene profile has not been identified within any organism in this lineage and holds the key to understanding the origin of cellular features in central processing of genomic information through replication, recombination, repair and the shaping of the chromosome. (nasa.gov)
- For example, the cox1 gene which encodes the subunit one of the cytochrome oxidase complex, comprises nine modules carried by nine chromosomes. (umontreal.ca)
- The SIR2 gene family, conserved from bacteria to humans, functions in silencing, cell cycle progression, and chromosome stability. (ebi.ac.uk)
- The Thermotoga strains and A. aeolicus acquired this gene independently from different archaeal species. (genomenewsnetwork.org)
Species8
- The chromosome copy number is identical in cultures with a twofold lower growth rate, in contrast to the results reported for several other prokaryotic species. (nih.gov)
- Dps homologs are found throughout the bacteria and in at least one archaeal species. (asm.org)
- To survive in extremely salty environments, this archaeon-as with other halophilic Archaeal species-utilizes compatible solutes (in particular potassium chloride) to reduce osmotic stress. (wikipedia.org)
- In many archaeal species, however, division is orchestrated differently. (tudelft.nl)
- Population genetic theory is developed for computing the joint frequency spectra of alleles in two closely related species, including the special case of sampling one chromosome from one of the species. (genetics.org)
- The joint-site frequency spectrum can be remarkably invariant over different demographic histories of the populations, providing that the chromosome from one of the descendant species carries the derived allele. (genetics.org)
- Related to the challenge of determining which contigs belong to the same species are the problems of how to further define and assemble the one or multiple chromosomes that comprise each species' genome, and how to define and assign plasmid content to one or multiple species. (g3journal.org)
- At the same time, repeats were observed in the archaeal organisms of Haloferax and Haloarcula species, and their function was studied by Francisco Mojica at the University of Alicante in Spain. (wikipedia.org)
Sequences8
- HTa preferentially binds to GC-rich sequences, exhibits invariant positioning throughout the growth cycle, and shows archaeal histone-like oligomerization behavior. (elifesciences.org)
- A few months later, the first eukaryotic genome was completed, with sequences of the 16 chromosomes of budding yeast Saccharomyces cerevisiae published as the result of a European-led effort begun in the mid-1980s. (wikipedia.org)
- The variations in bacterial and archaeal genome DNA sequences are not only explained by neutral mutations. (frontiersin.org)
- Therefore, virus resistance systems have resulted in changes in bacterial and archaeal genome DNA sequences during evolution. (frontiersin.org)
- I welcome investigators to contribute any types of the tier 1 articles focusing on the evolution and function of bacterial (or archaeal) genome sequences to this Research Topic. (frontiersin.org)
- 1992. Early evolutionary relationships among known life forms inferred from elongation factor EF-2/EF-G sequences: Phylogenetic coherence and structure of the Archaeal domain. (tolweb.org)
- Find this article online O'Keefe RT, Henderson SC, Spector DL (1992) Dynamic organization of DNA replication in mammalian cell nuclei: Spatially and temporally defined replication of chromosome-specific alpha-satellite DNA sequences. (thefullwiki.org)
- In a process called genetic recombination , genetic material ( DNA ) joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information. (wikipedia.org)
Plasmids and chromosomes3
- Although his hypothesis turned out to be wrong, Mojica's supervisor surmised at the time that the clustered repeats had a role in correctly segregating replicated DNA into daughter cells during cell division because plasmids and chromosomes with identical repeat arrays could not coexist in Haloferax volcanii . (wikipedia.org)
- One of the disadvantages of circular plasmids and chromosomes is their high sensitivity to rearrangements caused by homologous recombination. (asmscience.org)
- Here we give an overview of the variety of site-specific resolution systems found on circular plasmids and chromosomes. (asmscience.org)
Protein10
- Due to the physiological importance and the high degree of conservation of this protein, its absence in archaeal organisms has raised intriguing questions pertaining to the evolution of the chaperone machine as a whole and that of its components in particular, namely, Hsp70(DnaK), Hsp40(DnaJ), and GrpE. (genetics.org)
- The study is also the first to describe the protein used to assemble archaeal DNA during cellular growth. (newswise.com)
- A chromosome is an organized structure of DNA and protein that is found in cells . (thefullwiki.org)
- DnaA boxes are the recognition sites for the DnaA protein, which is essential for the initiation of chromosome replication. (deepdyve.com)
- Currently, extremophile research is more directed towards the fundamental aspects of chromosome segregation, involving state-of-the art protein imaging techniques. (wur.nl)
- Here, we report the isolation of meiotic chromosome association 1 (MEICA1), a novel protein participating in meiotic recombination in rice ( Oryza sativa ). (plantcell.org)
- Archaeal histone only contains a H3-H4 like dimeric structure made out of the same protein. (wikipedia.org)
- There is no consensus on how these archaeal origins are recognised- some are bound by a single Orc1/Cdc6 protein while others require a multi‐ Orc1/Cdc6 complex. (nottingham.ac.uk)
- The 3D-structure of an archaeal sirtuin in complex with NAD reveals that the protein consists of a large domain having a Rossmann fold and a small domain containing a three-stranded zinc ribbon motif. (ebi.ac.uk)
- This year marks the 20th anniversary of the first report on the archaeal replicative helicase, the minichromosome maintenance (MCM) protein. (asm.org)
Recombination6
- Clerget M (1991) Site-specific recombination promoted by a short DNA segment of plasmid R1 and by a homologous segment in the terminus region of the Escherichia coli chromosome. (springer.com)
- Conjugation requires stable and extended contact between a donor and a recipient strain, is DNase resistant, and the transferred DNA is incorporated into the recipient chromosome by homologous recombination. (wikipedia.org)
- Studies of archaeal conjugation, prokaryotic DNA recombination, and the universality of nuclear-mediated meiotic activities might corroborate the hypothesis that sex and the nucleus evolved to support DNA repair. (pubmedcentralcanada.ca)
- Meiosis is a division of germ-line cells that involves recombination of genetic material and segregation of homologous chromosomes, leading to production of haploid gametes from a diploid cell, while mitosis preserves the initial chromosome number in both daughter cells. (hindawi.com)
- Homologous recombination plays a central role in guaranteeing chromosome segregation during meiosis. (plantcell.org)
- Although frequently considered as independent systems or events, in recent years it has become clear that three of the most fundamental processes that support chromosome integrity and cell proliferation - DNA replication, repair, and recombination - are highly interconnected. (keystonesymposia.org)
Host chromosomes3
- Most of the differences in GC content between plasmids and their host chromosomes are of less than 10%, suggesting that host organisms cannot maintain and regulate plasmids with very different GC content from their own. (frontiersin.org)
- A provirus not only refers to a retrovirus but is also used to describe other viruses that can integrate into the host chromosomes, another example being adeno-associated virus. (wikipedia.org)
- We argue that relative entropy differences reflect how plasmids, phages and GIs interact with microbial host chromosomes and that all these biological entities are, or have been, subjected to different selective pressures. (biomedcentral.com)
Circular chromosomes1
- Typically eukaryotic cells (cells with nuclei) have large linear chromosomes and prokaryotic cells (cells without nuclei) smaller circular chromosomes, although there are many exceptions to this rule. (bionity.com)
Prokaryotic chromosomes3
- Prokaryotic chromosomes code for toxin-antitoxin (TA) loci, often in multiple copies. (nih.gov)
- In addition, because of the asymmetric nucleotide composition of prokaryotic chromosomes, the replication origins have been identified around the boundaries of GC or AT skew [7]. (deepdyve.com)
- We analyzed the differences in information capacity between prokaryotic chromosomes, genomic islands (GI), phages, and plasmids. (biomedcentral.com)
Organism2
- This redundancy allowed loss of the archaeal chromosome, generating an organism with eukaryotic features. (springer.com)
- A chromosome is a deoxyribonucleic acid (DNA) molecule with part or all of the genetic material (genome) of an organism. (explained.today)
Genetics1
- 2005-2007: Associate Professor of Archaeal Genetics and Genomics at the Institute of Molecular Biology, University of Copenhagen, Denmark 2. (hindawi.com)
Bacteria4
- Although archaeal flagella are functionally similar to the flagella found on bacteria, they differ significantly in structure and presumed mode of assembly. (els.net)
- In most bacteria, two replication forks assemble at the replication origin of chromosomes (oriCs) and move in opposite directions, and then leading to bidirectional growth of both daughter strands. (deepdyve.com)
- Researchers examined nucleoid distribution during the cell cycle, and the results suggested that chromosome segregation was concomitant with DNA replication, as was proposed for M. thermautotrophicus , in a mode akin to that employed by bacteria. (asmscience.org)
- This mechanism of archaeal viral inhibition of plasmid propagation is not observed in bacteria where relevant bacteriophages either are dependent on a conjugative plasmid for successful infection or are excluded by a resident plasmid. (pasteur.fr)
Mitosis6
- During mitosis, DNA is condensed into visible chromosomes (prophase) that arrange at the cell midplane (metaphase), separate (anaphase), and decondense into the interphase. (thefullwiki.org)
- The structure of chromatin varies through the cell cycle , and is responsible for the organisation of chromosomes into the classic four-arm structure during mitosis and meiosis . (bionity.com)
- It is not easy to identify who first discerned chromosomes during mitosis, but there is no doubt that those who first saw them had no idea of their significance. (bionity.com)
- [9] This more or less concludes the first period, in which chromosomes were visually sighted, and the morphological stages of mitosis were described. (bionity.com)
- A principal difference between the results of meiosis and mitosis is determined by their difference in genetic control, chromosome structure, and chromosome behavior. (hindawi.com)
- When the diploid cells are duplicated and condensed during mitosis , the result is about 120 micrometers of chromosomes . (wikipedia.org)
Meiosis4
- The segregation of chromosomes during meiosis I requires a bipolar spindle at metaphase. (genetics.org)
- In the first stage of sexual reproduction, "meiosis", the number of chromosomes is reduced from a diploid number (2n) to a haploid number (n). (wikipedia.org)
- Between fertilisation and meiosis there can be a large number of cell divisions without change of the number of chromosomes. (wikipedia.org)
- Meiosis in the parents' gonads produce gamete cells which only contain 23 chromosomes each. (wikipedia.org)
Developed the chromosome theory of i1
- Walter Sutton (left) and Theodor Boveri (right) independently developed the chromosome theory of inheritance in 1902. (th.ai)
Plasmid3
- The plasmid DNA has lower GC content than its host chromosome DNA does. (frontiersin.org)
- In prokaryotes, a small circular DNA molecule may be called either a plasmid or a small chromosome. (bionity.com)
- Although nucleotide sequence comparisons revealed extensive intergenomic exchange during the evolution of archaeal conjugative plasmids, pAH1 was shown to be stably maintained suggesting that the host system is suitable for studying plasmid-virus interactions. (pasteur.fr)
Homologous chromosomes1
- Uniparental disomy is the inheritance of two homologous chromosomes from one parent. (thefullwiki.org)
Role in chromosome segregation1
- Yeast Nuf2 disappears from the centromere during meiotic prophase when centromeres lose their connection to the spindle pole body, and plays a regulatory role in chromosome segregation. (nih.gov)
Methanococcus1
- Electron micrographs of (a) a Methanococcus maripaludis cell (approximately 1 μm in diameter) displaying numerous flagellar filaments and (b) purified archaeal flagella from Methanococcus maripaludis (flagella approximately 12 nm in diameter). (els.net)
Diploid3
- During "fertilization", haploid gametes come together to form a diploid zygote and the original number of chromosomes is restored. (wikipedia.org)
- Sexual reproduction is a kind of life cycle where generations alternate between cells with a single set of chromosomes ( haploid ) and cells with a double set of chromosomes ( diploid ). (wikipedia.org)
- An image of the 46 chromosomes making up the diploid genome of a human male. (readtiger.com)
Origins8
- Archaeal DNA Replication Origins and Recruitment of the MCM Replicative Helicase. (nih.gov)
- Mechanism of Archaeal MCM Helicase Recruitment to DNA Replication Origins. (nih.gov)
- DNA replication initiation, which starts at specific chromosomal site (known as replication origins), is the key regulatory stage of chromosome replication. (frontiersin.org)
- This review summarizes the research progress in understanding of archaeal replication origins with particular focus on the utilization, control and evolution of multiple replication origins in haloarchaea. (frontiersin.org)
- Bacterial chromosomes are typically replicated from a single origin, whereas the replication of eukaryotic chromosomes initiates from a number of discrete origins ( Leonard and Mechali, 2013 ). (frontiersin.org)
- The duplication of the genetic information in a cell begins at specific sites on the chromosomes, termed DNA replication origins. (deepdyve.com)
- Sequence conservation of ORM and mini-ORB (m-ORB) elements at archaeal origins of replication. (asmscience.org)
- In studies that insert a second replication origin into the chromosome, both origins are typically active at the same time. (asm.org)
Lineages1
- Gaining a detailed understanding of the non-core PCNA interactome will provide significant insights into key aspects of chromosome biology in divergent archaeal lineages. (st-andrews.ac.uk)
Linear chromosomes1
- These include mRNA capping, linear chromosomes, and separation of transcription from translation. (springer.com)
Daughter chromosomes3
- In Escherichia coli, topoisomerase III functions as the principal cellular decatenase, capable of unlinking replicating daughter chromosomes [ PMID: 12509418 ]. (ebi.ac.uk)
- It appears that Topoisomerase III works by removing precatenanes, an alternative form that can be taken by the positive linkages that arise between the daughter chromosomes during replication. (ebi.ac.uk)
- Topological entanglement between daughter chromosomes has to be reduced to exactly zero every time an E. coli cell divides. (asm.org)
Bacterial chromosomes2
- Bacterial chromosomes are immense polymers whose faithful replication and segregation are crucial to cell survival. (springer.com)
- Furthermore, the capabilities of multiplexing (sequencing more than one sample simultaneously on one flow cell) with long-read sequencing platforms in order to recover complete bacterial chromosomes are poorly documented. (unl.edu)
Cells15
- Structures within the nucleus of archaeal cells consisting of or containing DNA, which carry genetic information essential to the cell. (rush.edu)
- Fast growing H. salinarum cells contain on average about 25 copies of the chromosome in exponential phase, and their ploidy is downregulated to 15 copies in early stationary phase. (nih.gov)
- Thus, two chaperoning systems that are designed to interact with a compatible partner, e.g. , the bacterial chaperone machine physiologically interacts with the bacterial but not with the eucaryal chaperonins, coexist in archaeal cells in spite of their apparent functional incompatibility. (genetics.org)
- Here we demonstrate that the mutant cells often form long filaments with expanded, non-partitioned or rarely partitioned chromosomes. (portlandpress.com)
- in 1902, the Boveri-Sutton Chromosome Theory unified the genetic laws of Mendelian inheritance with the physical structures of chromosomes observed in cells? (thefullwiki.org)
- Pallister-Killian syndrome is a rare congenital genetic disorder that cannot be detected through prenatal blood tests because it occurs only in the chromosomes of skin cells ? (thefullwiki.org)
- The cell division cycle includes when chromosomes of daughter cells replicate. (wikipedia.org)
- Because archea have a singular structure chromosome, the two daughter cells separate and cell divides. (wikipedia.org)
- Textbooks have often said that chromosomes were first observed in plant cells by a Swiss botanist named Karl Wilhelm von Nägeli in 1842. (bionity.com)
- Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents. (wikipedia.org)
- It may be prokaryotic cells which encoded a plasma membrane, simply produced additional membrane which surrounded the bacterial chromosome. (sunyorange.edu)
- VAPs (virus-associated pyramids) formed by the Sulfolobus islandicus rod-shaped virus 2 (SIRV2) in cells of its hyperthermophilic archaeal host. (pasteur.fr)
- A eukaryotic cell is a strikingly complex macromolecular aggregate by any account, but specifically when compared with archaeal and bacterial cells. (biomedcentral.com)
- [4] In animal cells, chromosomes reach their highest compaction level in anaphase during chromosome segregation . (th.ai)
- Some use the term chromosome in a wider sense, to refer to the individualized portions of chromatin in cells, either visible or not under light microscopy. (th.ai)
Facilitating chromosome segregation1
- May participate in facilitating chromosome segregation by condensation DNA from both sides of a centrally located replisome during cell division. (uniprot.org)
Mechanisms3
- Two mechanisms have been proposed for stably maintaining an integrated element within archaeal chromosomes. (biochemsoctrans.org)
- Indeed, what little is known appears to be suggesting that diverse mechanisms may be employed to regulate chromosome copy number, to coordinate DNA replication and cell division, and even to mediate the process of cell division itself. (asmscience.org)
- However, the environmental cues and the molecular mechanisms driving archaeal biofilm development are not characterized. (scoop.it)
Replication origin1
- Dueber ELC, Corn JE, Bell SD, Berger JM (2007) Replication origin recognition and deformation by a heterodimeric archaeal Orc1 complex. (springer.com)
Phylogenetic2
- Previous phylogenetic analysis of 16S RNA suggested that M. kandleri belonged to a very deep branch, close to the root of the archaeal tree. (pnas.org)
- Several analyses, based on phylogenetic trees for 16S rRNA and the presence/absence of an 11-aa insertion in EF-1α, placed M. kandleri close to the root of the Euryarchaeota and did not suggest any specific affinity with other archaeal methanogens ( 13 - 15 ). (pnas.org)
Histones1
- Without histones, the unwound DNA in chromosomes would be very long (a length to width ratio of more than 10 million to 1 in human DNA). (wikipedia.org)
20161
- Bell SP, Labib K (2016) Chromosome duplication in Saccharomyces cerevisiae. (springer.com)
Structures1
- The German scientists Schleiden , [4] Virchow and Bütschli were among the first scientists who recognized the structures now familiar as chromosomes. (th.ai)
Sulfolobus1
- Duggin IG, McCallum SA, Bell SD (2008) Chromosome replication dynamics in the archaeon Sulfolobus acidocaldarius. (springer.com)
Condensation1
- Involved in chromosome condensation, segregation and cell cycle progression. (uniprot.org)
Initiation1
- Flow cytometric studies revealed that synchronization of chromosome replication initiation is also significantly disturbed in the cgtA mutant. (portlandpress.com)
Complete genome1
- This research provides a series of criteria for why short-read sequencing and assembly often does not result in the generation of complete genome assemblies, and how multiplexed, long-read data can greatly reduce time and financial resources for many bacterial and archaeal sequencing projects. (unl.edu)
Cellular1
- Failure to control these processes causes chromosome instability, which can lead to the development of cellular abnormalities, genetic disease and the onset of cancer. (trieste.it)
Crenarchaeota1
- Brochier-Armanet C, Boussau B, Gribaldo S, Forterre P (2008) Mesophilic crenarchaeota: proposal for a third archaeal phylum, the Thaumarchaeota. (springer.com)
PMID1
- Sir2 functions in transcriptional silencing, cell cycle progression, and chromosome stability [ PMID: 7498786 ]. (ebi.ac.uk)
Stably1
- The rate at which amelioration of horizontally acquired DNA occurs within the chromosome is likely to account for the small differences between chromosomes and stably incorporated GIs compared to the transient or independent replicons such as phages and plasmids. (biomedcentral.com)
Metaphase4
- Korenberg J. R. & Rykowski, M. C. Human genome organization: Alu, lines, and the molecular structure of metaphase chromosome bands. (thefullwiki.org)
- Diagram of a duplicated and condensed metaphase eukaryotic chromosome. (thefullwiki.org)
- Chromosomes are normally visible under a light microscope only when the cell is undergoing the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). (th.ai)
- During metaphase the X-shape structure is called a metaphase chromosome. (th.ai)
Faithful replication1
- This chapter describes the recent advances that have been made in understanding the biochemical players that facilitate the complex macromolecular process that mediates faithful replication of archaeal chromosomes. (asmscience.org)
Histone1
- Charting HTa-based chromatin architecture in vitro, in vivo and in an HTa-expressing E. coli strain, we present evidence that HTa is an archaeal histone analog. (elifesciences.org)
Instability1
- Their malfunction can cause chromosome instability associated with cancer, infertility, and birth defects. (duke.edu)