DNA gyrase subunit B (GyrB) is the ATPase subunit of DNA gyrase, which is a type II topoisomerase that negatively supercoils closed circular double-stranded (ds) DNA in an ATP-dependent manner to modulate DNA topology and maintain chromosomes in an underwound state; may be partial
DNA gyrase, B subunit; This model describes the common type II DNA topoisomerase (DNA gyrase). ...
1-317
4.05e-151
DNA gyrase, B subunit; This model describes the common type II DNA topoisomerase (DNA gyrase). Two apparently independently arising families, one in the Proteobacteria and one in Gram-positive lineages, are both designated toposisomerase IV. Proteins scoring above the noise cutoff for this model and below the trusted cutoff for topoisomerase IV models probably should be designated GyrB. [DNA metabolism, DNA replication, recombination, and repair]
Pssm-ID: 273421 [Multi-domain] Cd Length: 654 Bit Score: 438.71 E-value: 4.05e-151
TopoIIA_Trans_DNA_gyrase: Transducer domain, having a ribosomal S5 domain 2-like fold, of the ...
127-284
2.04e-83
TopoIIA_Trans_DNA_gyrase: Transducer domain, having a ribosomal S5 domain 2-like fold, of the type found in proteins of the type IIA family of DNA topoisomerases similar to the B subunits of E. coli DNA gyrase and E. coli Topoisomerase IV which are heterodimers composed of two subunits. The type IIA enzymes are the predominant form of topoisomerase and are found in some bacteriophages, viruses and archaea, and in all bacteria and eukaryotes. All type IIA topoisomerases are related to each other at amino acid sequence level, though their oligomeric organization sometimes differs. TopoIIA enzymes cut both strands of the duplex DNA to remove (relax) both positive and negative supercoils in DNA. These enzymes covalently attach to the 5' ends of the cut DNA, separate the free ends of the cleaved strands, pass another region of the duplex through this gap, then rejoin the ends. TopoIIA enzymes also catenate/ decatenate duplex rings. E.coli DNA gyrase is a heterodimer composed of two subunits. E. coli DNA gyrase B subunit is known to be important in nucleotide hydrolysis and the transduction of structural signals from ATP-binding site to the DNA breakage/reunion regions of the enzymes.
Pssm-ID: 238419 [Multi-domain] Cd Length: 172 Bit Score: 249.01 E-value: 2.04e-83
DNA gyrase B; This family represents the second domain of DNA gyrase B which has a ribosomal ...
128-284
1.33e-65
DNA gyrase B; This family represents the second domain of DNA gyrase B which has a ribosomal S5 domain 2-like fold. This family is structurally related to PF01119.
Pssm-ID: 425522 [Multi-domain] Cd Length: 173 Bit Score: 204.00 E-value: 1.33e-65
DNA gyrase, B subunit; This model describes the common type II DNA topoisomerase (DNA gyrase). ...
1-317
4.05e-151
DNA gyrase, B subunit; This model describes the common type II DNA topoisomerase (DNA gyrase). Two apparently independently arising families, one in the Proteobacteria and one in Gram-positive lineages, are both designated toposisomerase IV. Proteins scoring above the noise cutoff for this model and below the trusted cutoff for topoisomerase IV models probably should be designated GyrB. [DNA metabolism, DNA replication, recombination, and repair]
Pssm-ID: 273421 [Multi-domain] Cd Length: 654 Bit Score: 438.71 E-value: 4.05e-151
TopoIIA_Trans_DNA_gyrase: Transducer domain, having a ribosomal S5 domain 2-like fold, of the ...
127-284
2.04e-83
TopoIIA_Trans_DNA_gyrase: Transducer domain, having a ribosomal S5 domain 2-like fold, of the type found in proteins of the type IIA family of DNA topoisomerases similar to the B subunits of E. coli DNA gyrase and E. coli Topoisomerase IV which are heterodimers composed of two subunits. The type IIA enzymes are the predominant form of topoisomerase and are found in some bacteriophages, viruses and archaea, and in all bacteria and eukaryotes. All type IIA topoisomerases are related to each other at amino acid sequence level, though their oligomeric organization sometimes differs. TopoIIA enzymes cut both strands of the duplex DNA to remove (relax) both positive and negative supercoils in DNA. These enzymes covalently attach to the 5' ends of the cut DNA, separate the free ends of the cleaved strands, pass another region of the duplex through this gap, then rejoin the ends. TopoIIA enzymes also catenate/ decatenate duplex rings. E.coli DNA gyrase is a heterodimer composed of two subunits. E. coli DNA gyrase B subunit is known to be important in nucleotide hydrolysis and the transduction of structural signals from ATP-binding site to the DNA breakage/reunion regions of the enzymes.
Pssm-ID: 238419 [Multi-domain] Cd Length: 172 Bit Score: 249.01 E-value: 2.04e-83
DNA gyrase B; This family represents the second domain of DNA gyrase B which has a ribosomal ...
128-284
1.33e-65
DNA gyrase B; This family represents the second domain of DNA gyrase B which has a ribosomal S5 domain 2-like fold. This family is structurally related to PF01119.
Pssm-ID: 425522 [Multi-domain] Cd Length: 173 Bit Score: 204.00 E-value: 1.33e-65
Histidine kinase-like ATPase domain of the B subunit of DNA gyrase; This family includes ...
1-123
1.83e-51
Histidine kinase-like ATPase domain of the B subunit of DNA gyrase; This family includes histidine kinase-like ATPase domain of the B subunit of DNA gyrase. Bacterial DNA gyrase is a type II topoisomerase (type II as it transiently cleaves both strands of DNA) which catalyzes the introduction of negative supercoils into DNA, possibly by a mechanism in which one segment of the double-stranded DNA substrate is passed through a transient break in a second segment. It consists of GyrA and GyrB subunits in an A2B2 stoichiometry; GyrA subunits catalyze strand-breakage and reunion reactions, and GyrB subunits hydrolyze ATP. DNA gyrase is found in bacteria, plants and archaea, but as it is absent in humans it is a possible drug target for the treatment of bacterial and parasite infections.
Pssm-ID: 340405 [Multi-domain] Cd Length: 180 Bit Score: 167.71 E-value: 1.83e-51
DNA topoisomerase IV, B subunit, proteobacterial; Operationally, topoisomerase IV is a type II ...
3-317
2.64e-43
DNA topoisomerase IV, B subunit, proteobacterial; Operationally, topoisomerase IV is a type II topoisomerase required for the decatenation of chromosome segregation. Not every bacterium has both a topo II and a topo IV. The topo IV families of the Gram-positive bacteria and the Gram-negative bacteria appear not to represent a single clade among the type II topoisomerases, and are represented by separate models for this reason. This protein is active as an alpha(2)beta(2) heterotetramer. [DNA metabolism, DNA replication, recombination, and repair]
Pssm-ID: 130127 [Multi-domain] Cd Length: 625 Bit Score: 157.00 E-value: 2.64e-43
MutL_Trans: transducer domain, having a ribosomal S5 domain 2-like fold, conserved in the ...
129-247
2.49e-20
MutL_Trans: transducer domain, having a ribosomal S5 domain 2-like fold, conserved in the C-terminal domain of type II DNA topoisomerases (Topo II) and DNA mismatch repair (MutL/MLH1/PMS2) proteins. This transducer domain is homologous to the second domain of the DNA gyrase B subunit, which is known to be important in nucleotide hydrolysis and the transduction of structural signals from ATP-binding site to the DNA breakage/reunion regions of the enzymes. The GyrB dimerizes in response to ATP binding, and is homologous to the N-terminal half of eukaryotic Topo II and the ATPase fragment of MutL. Type II DNA topoisomerases catalyze the ATP-dependent transport of one DNA duplex through another, in the process generating transient double strand breaks via covalent attachments to both DNA strands at the 5' positions. Included in this group are proteins similar to human MLH1 and PMS2. MLH1 forms a heterodimer with PMS2 which functions in meiosis and in DNA mismatch repair (MMR). Cells lacking either hMLH1 or hPMS2 have a strong mutator phenotype and display microsatellite instability (MSI). Mutation in hMLH1 accounts for a large fraction of Lynch syndrome (HNPCC) families.
Pssm-ID: 238202 [Multi-domain] Cd Length: 107 Bit Score: 84.23 E-value: 2.49e-20
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
Click on the triangle to view details about the feature, including a multiple sequence alignment
of your query sequence and the protein sequences used to curate the domain model,
where hash marks (#) above the aligned sequences show the location of the conserved feature residues.
The thumbnail image, if present, provides an approximate view of the feature's location in 3 dimensions.
Click on the triangle for interactive 3D structure viewing options.
Functional characterization of the conserved domain architecture found on the query.
Click here to see more details.
This image shows a graphical summary of conserved domains identified on the query sequence.
The Show Concise/Full Display button at the top of the page can be used to select the desired level of detail: only top scoring hits
(labeled illustration) or all hits
(labeled illustration).
Domains are color coded according to superfamilies
to which they have been assigned. Hits with scores that pass a domain-specific threshold
(specific hits) are drawn in bright colors.
Others (non-specific hits) and
superfamily placeholders are drawn in pastel colors.
if a domain or superfamily has been annotated with functional sites (conserved features),
they are mapped to the query sequence and indicated through sets of triangles
with the same color and shade of the domain or superfamily that provides the annotation. Mouse over the colored bars or triangles to see descriptions of the domains and features.
click on the bars or triangles to view your query sequence embedded in a multiple sequence alignment of the proteins used to develop the corresponding domain model.
The table lists conserved domains identified on the query sequence. Click on the plus sign (+) on the left to display full descriptions, alignments, and scores.
Click on the domain model's accession number to view the multiple sequence alignment of the proteins used to develop the corresponding domain model.
To view your query sequence embedded in that multiple sequence alignment, click on the colored bars in the Graphical Summary portion of the search results page,
or click on the triangles, if present, that represent functional sites (conserved features)
mapped to the query sequence.
Concise Display shows only the best scoring domain model, in each hit category listed below except non-specific hits, for each region on the query sequence.
(labeled illustration) Standard Display shows only the best scoring domain model from each source, in each hit category listed below for each region on the query sequence.
(labeled illustration) Full Display shows all domain models, in each hit category below, that meet or exceed the RPS-BLAST threshold for statistical significance.
(labeled illustration) Four types of hits can be shown, as available,
for each region on the query sequence:
specific hits meet or exceed a domain-specific e-value threshold
(illustrated example)
and represent a very high confidence that the query sequence belongs to the same protein family as the sequences use to create the domain model
non-specific hits
meet or exceed the RPS-BLAST threshold for statistical significance (default E-value cutoff of 0.01, or an E-value selected by user via the
advanced search options)
the domain superfamily to which the specific and non-specific hits belong
multi-domain models that were computationally detected and are likely to contain multiple single domains
Retrieve proteins that contain one or more of the domains present in the query sequence, using the Conserved Domain Architecture Retrieval Tool
(CDART).
Modify your query to search against a different database and/or use advanced search options
