DNA-directed RNA polymerase, alpha subunit, bacterial and chloroplast-type; This family ...
9-255
6.56e-133
DNA-directed RNA polymerase, alpha subunit, bacterial and chloroplast-type; This family consists of the bacterial (and chloroplast) DNA-directed RNA polymerase alpha subunit, encoded by the rpoA gene. The RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. The amino terminal domain is involved in dimerizing and assembling the other RNA polymerase subunits into a transcriptionally active enzyme. The carboxy-terminal domain contains determinants for interaction with DNA and with transcriptional activator proteins. [Transcription, DNA-dependent RNA polymerase]
Pssm-ID: 273934 [Multi-domain] Cd Length: 297 Bit Score: 377.00 E-value: 6.56e-133
N-terminal domain of the Alpha subunit of Bacterial RNA polymerase; The bacterial alpha ...
2-213
3.91e-120
N-terminal domain of the Alpha subunit of Bacterial RNA polymerase; The bacterial alpha subunit of RNA polymerase (RNAP) consists of two independently folded domains: an amino-terminal domain (alphaNTD) and a carboxy-terminal domain (alphaCTD). AlphaCTD is not required for RNAP assembly but interacts with transcription activators. AlphaNTD is essential in vivo and in vitro for RNAP assembly and basal transcription. It is similar to the eukaryotic RPB3/AC40/archaeal D subunit, and contains two subdomains: one subdomain is similar the eukaryotic Rpb11/AC19/archaeal L subunit which is involved in dimerization; and the other is an inserted beta sheet subdomain. The alphaNTDs of plant plastid RNAP (PEP) are also included in this subfamily. PEP is largely responsible for the transcription of photosynthetic genes and is closely related to the multi-subunit bacterial RNAP, which is a large multi-subunit complex responsible for the synthesis of all bacterial RNAs. The bacterial RNAP core enzyme consists of four subunits (beta', beta, alpha and omega). All residues in the alpha subunit that is involved in dimerization or in the interaction with other subunits are located within alphaNTD.
Pssm-ID: 132904 [Multi-domain] Cd Length: 215 Bit Score: 341.37 E-value: 3.91e-120
RNA polymerase Rpb3/Rpb11 dimerization domain; The two eukaryotic subunits Rpb3 and Rpb11 ...
16-209
2.03e-69
RNA polymerase Rpb3/Rpb11 dimerization domain; The two eukaryotic subunits Rpb3 and Rpb11 dimerize to from a platform onto which the other subunits of the RNA polymerase assemble (D/L in archaea). The prokaryotic equivalent of the Rpb3/Rpb11 platform is the alpha-alpha dimer. The dimerization domain of the alpha subunit/Rpb3 is interrupted by an insert domain (pfam01000). Some of the alpha subunits also contain iron-sulphur binding domains (pfam00037). Rpb11 is found as a continuous domain. Members of this family include: alpha subunit from eubacteria, alpha subunits from chloroplasts, Rpb3 subunits from eukaryotes, Rpb11 subunits from eukaryotes, RpoD subunits from archaeal spp, and RpoL subunits from archaeal spp.
Pssm-ID: 460104 [Multi-domain] Cd Length: 191 Bit Score: 211.88 E-value: 2.03e-69
DNA-directed RNA polymerase, alpha subunit, bacterial and chloroplast-type; This family ...
9-255
6.56e-133
DNA-directed RNA polymerase, alpha subunit, bacterial and chloroplast-type; This family consists of the bacterial (and chloroplast) DNA-directed RNA polymerase alpha subunit, encoded by the rpoA gene. The RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. The amino terminal domain is involved in dimerizing and assembling the other RNA polymerase subunits into a transcriptionally active enzyme. The carboxy-terminal domain contains determinants for interaction with DNA and with transcriptional activator proteins. [Transcription, DNA-dependent RNA polymerase]
Pssm-ID: 273934 [Multi-domain] Cd Length: 297 Bit Score: 377.00 E-value: 6.56e-133
N-terminal domain of the Alpha subunit of Bacterial RNA polymerase; The bacterial alpha ...
2-213
3.91e-120
N-terminal domain of the Alpha subunit of Bacterial RNA polymerase; The bacterial alpha subunit of RNA polymerase (RNAP) consists of two independently folded domains: an amino-terminal domain (alphaNTD) and a carboxy-terminal domain (alphaCTD). AlphaCTD is not required for RNAP assembly but interacts with transcription activators. AlphaNTD is essential in vivo and in vitro for RNAP assembly and basal transcription. It is similar to the eukaryotic RPB3/AC40/archaeal D subunit, and contains two subdomains: one subdomain is similar the eukaryotic Rpb11/AC19/archaeal L subunit which is involved in dimerization; and the other is an inserted beta sheet subdomain. The alphaNTDs of plant plastid RNAP (PEP) are also included in this subfamily. PEP is largely responsible for the transcription of photosynthetic genes and is closely related to the multi-subunit bacterial RNAP, which is a large multi-subunit complex responsible for the synthesis of all bacterial RNAs. The bacterial RNAP core enzyme consists of four subunits (beta', beta, alpha and omega). All residues in the alpha subunit that is involved in dimerization or in the interaction with other subunits are located within alphaNTD.
Pssm-ID: 132904 [Multi-domain] Cd Length: 215 Bit Score: 341.37 E-value: 3.91e-120
RNA polymerase Rpb3/Rpb11 dimerization domain; The two eukaryotic subunits Rpb3 and Rpb11 ...
16-209
2.03e-69
RNA polymerase Rpb3/Rpb11 dimerization domain; The two eukaryotic subunits Rpb3 and Rpb11 dimerize to from a platform onto which the other subunits of the RNA polymerase assemble (D/L in archaea). The prokaryotic equivalent of the Rpb3/Rpb11 platform is the alpha-alpha dimer. The dimerization domain of the alpha subunit/Rpb3 is interrupted by an insert domain (pfam01000). Some of the alpha subunits also contain iron-sulphur binding domains (pfam00037). Rpb11 is found as a continuous domain. Members of this family include: alpha subunit from eubacteria, alpha subunits from chloroplasts, Rpb3 subunits from eukaryotes, Rpb11 subunits from eukaryotes, RpoD subunits from archaeal spp, and RpoL subunits from archaeal spp.
Pssm-ID: 460104 [Multi-domain] Cd Length: 191 Bit Score: 211.88 E-value: 2.03e-69
RNA polymerase Rpb3/RpoA insert domain; Members of this family include: alpha subunit from ...
45-160
6.04e-43
RNA polymerase Rpb3/RpoA insert domain; Members of this family include: alpha subunit from eubacteria alpha subunits from chloroplasts Rpb3 subunits from eukaryotes RpoD subunits from archaeal
Pssm-ID: 425983 Cd Length: 117 Bit Score: 141.62 E-value: 6.04e-43
RPB11 and RPB3 subunits of RNA polymerase; The eukaryotic RPB11 and RPB3 subunits of RNA ...
161-210
1.34e-08
RPB11 and RPB3 subunits of RNA polymerase; The eukaryotic RPB11 and RPB3 subunits of RNA polymerase (RNAP), as well as their archaeal (L and D subunits) and bacterial (alpha subunit) counterparts, are involved in the assembly of RNAP, a large multi-subunit complex responsible for the synthesis of RNA. It is the principal enzyme of the transcription process, and is a final target in many regulatory pathways that control gene expression in all living cells. At least three distinct RNAP complexes are found in eukaryotic nuclei: RNAP I, RNAP II, and RNAP III, for the synthesis of ribosomal RNA precursor, mRNA precursor, and 5S and tRNA, respectively. A single distinct RNAP complex is found in prokaryotes and archaea, which may be responsible for the synthesis of all RNAs. The assembly of the two largest eukaryotic RNAP subunits that provide most of the enzyme's catalytic functions depends on the presence of RPB3/RPB11 heterodimer subunits. This is also true for the archaeal (D/L subunits) and bacterial (alpha subunit) counterparts.
Pssm-ID: 132901 Cd Length: 86 Bit Score: 50.88 E-value: 1.34e-08
Bacterial RNA polymerase, alpha chain C terminal domain; The alpha subunit of RNA polymerase ...
233-255
5.06e-05
Bacterial RNA polymerase, alpha chain C terminal domain; The alpha subunit of RNA polymerase consists of two independently folded domains, referred to as amino-terminal and carboxyl terminal domains. The amino terminal domain is involved in the interaction with the other subunits of the RNA polymerase. The carboxyl-terminal domain interacts with the DNA and activators. The amino acid sequence of the alpha subunit is conserved in prokaryotic and chloroplast RNA polymerases. There are three regions of particularly strong conservation, two in the amino-terminal and one in the carboxyl- terminal.
Pssm-ID: 427148 [Multi-domain] Cd Length: 63 Bit Score: 40.22 E-value: 5.06e-05
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.
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Functional characterization of the conserved domain architecture found on the query.
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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
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if a domain or superfamily has been annotated with functional sites (conserved features),
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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)
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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
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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
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