RNA polymerase Rpb1, domain 1; RNA polymerases catalyze the DNA dependent polymerization of ...
1-244
5.75e-74
RNA polymerase Rpb1, domain 1; RNA polymerases catalyze the DNA dependent polymerization of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 1, represents the clamp domain, which a mobile domain involved in positioning the DNA, maintenance of the transcription bubble and positioning of the nascent RNA strand.
The actual alignment was detected with superfamily member pfam04997:
Pssm-ID: 398595 Cd Length: 320 Bit Score: 227.56 E-value: 5.75e-74
RNA polymerase Rpb1, domain 1; RNA polymerases catalyze the DNA dependent polymerization of ...
1-244
5.75e-74
RNA polymerase Rpb1, domain 1; RNA polymerases catalyze the DNA dependent polymerization of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 1, represents the clamp domain, which a mobile domain involved in positioning the DNA, maintenance of the transcription bubble and positioning of the nascent RNA strand.
Pssm-ID: 398595 Cd Length: 320 Bit Score: 227.56 E-value: 5.75e-74
Largest subunit (Rpb1) of eukaryotic RNA polymerase II (RNAP II), N-terminal domain; The two ...
100-248
7.41e-73
Largest subunit (Rpb1) of eukaryotic RNA polymerase II (RNAP II), N-terminal domain; The two largest subunits of RNA polymerase II (RNAP II), Rpb1 and Rpb2, form the active site, DNA entry channel and RNA exit channel. RNAP II is a large multi-subunit complex responsible for the synthesis of mRNA in eukaryotes. RNAP II consists of a 10-subunit core enzyme and a peripheral heterodimer of two subunits. Structure studies suggest that RNAP complexes from different organisms share a crab-claw-shape structure. In yeast, Rpb1 and Rpb2, each makes up one clamp, one jaw, and part of the cleft. Rpb1_N contains part of the active site, forms the head and core of the one clamp, and makes up the pore and funnel regions of RNAP II.
Pssm-ID: 259848 [Multi-domain] Cd Length: 751 Bit Score: 235.89 E-value: 7.41e-73
DNA-directed RNA polymerase subunit A'; This family consists of the archaeal A' subunit of the ...
1-248
2.43e-39
DNA-directed RNA polymerase subunit A'; This family consists of the archaeal A' subunit of the DNA-directed RNA polymerase. The example from Methanocaldococcus jannaschii contains an intein.
Pssm-ID: 274106 [Multi-domain] Cd Length: 868 Bit Score: 144.86 E-value: 2.43e-39
RNA polymerase Rpb1, domain 1; RNA polymerases catalyze the DNA dependent polymerization of ...
1-244
5.75e-74
RNA polymerase Rpb1, domain 1; RNA polymerases catalyze the DNA dependent polymerization of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 1, represents the clamp domain, which a mobile domain involved in positioning the DNA, maintenance of the transcription bubble and positioning of the nascent RNA strand.
Pssm-ID: 398595 Cd Length: 320 Bit Score: 227.56 E-value: 5.75e-74
Largest subunit (Rpb1) of eukaryotic RNA polymerase II (RNAP II), N-terminal domain; The two ...
100-248
7.41e-73
Largest subunit (Rpb1) of eukaryotic RNA polymerase II (RNAP II), N-terminal domain; The two largest subunits of RNA polymerase II (RNAP II), Rpb1 and Rpb2, form the active site, DNA entry channel and RNA exit channel. RNAP II is a large multi-subunit complex responsible for the synthesis of mRNA in eukaryotes. RNAP II consists of a 10-subunit core enzyme and a peripheral heterodimer of two subunits. Structure studies suggest that RNAP complexes from different organisms share a crab-claw-shape structure. In yeast, Rpb1 and Rpb2, each makes up one clamp, one jaw, and part of the cleft. Rpb1_N contains part of the active site, forms the head and core of the one clamp, and makes up the pore and funnel regions of RNAP II.
Pssm-ID: 259848 [Multi-domain] Cd Length: 751 Bit Score: 235.89 E-value: 7.41e-73
A' subunit of archaeal RNA polymerase (RNAP); A' is the largest subunit of the archaeal RNA ...
1-248
5.85e-42
A' subunit of archaeal RNA polymerase (RNAP); A' is the largest subunit of the archaeal RNA polymerase (RNAP). Archaeal RNAP is closely related to RNA polymerases in eukaryotes based on the subunit compositions. Archaeal RNAP is a large multi-protein complex, made up of 11 to 13 subunits, depending on the species, that are responsible for the synthesis of RNA. Structure studies suggest that RNAP complexes from different organisms share a crab-claw-shaped structure. The largest eukaryotic RNAP subunit is encoded by two separate archaeal subunits (A' and A'') which correspond to the N- and C-terminal domains of eukaryotic RNAP II Rpb1, respectively. The N-terminal domain of Rpb1 forms part of the active site and includes the head and the core of one clamp as well as the pore and funnel structures of RNAP II. Based on a structural comparison among the archaeal, bacterial and eukaryotic RNAPs the DNA binding channel and the active site are part of A' subunit which is conserved. The strong similarity between subunit A' and the N-terminal domain of Rpb1 suggests a similar functional and structural role for these two proteins.
Pssm-ID: 259846 [Multi-domain] Cd Length: 861 Bit Score: 152.02 E-value: 5.85e-42
DNA-directed RNA polymerase subunit A'; This family consists of the archaeal A' subunit of the ...
1-248
2.43e-39
DNA-directed RNA polymerase subunit A'; This family consists of the archaeal A' subunit of the DNA-directed RNA polymerase. The example from Methanocaldococcus jannaschii contains an intein.
Pssm-ID: 274106 [Multi-domain] Cd Length: 868 Bit Score: 144.86 E-value: 2.43e-39
Largest subunit (RPC1) of eukaryotic RNA polymerase III (RNAP III), N-terminal domain; Rpc1 ...
103-248
9.11e-23
Largest subunit (RPC1) of eukaryotic RNA polymerase III (RNAP III), N-terminal domain; Rpc1 (C160) subunit forms part of the active site region of RNAP III. RNAP III is one of the three distinct classes of nuclear RNAP in eukaryotes that is responsible for the synthesis of tRNAs, 5SrRNA, Alu-RNA, U6 snRNA genes, and some others. RNAP III is the largest nuclear RNA polymerase with 17 subunits. Structure studies suggest that different RNA polymerase complexes share a similar crab-claw-shaped structure. The N-terminal domain of Rpb1, the largest subunit of RNAP II in yeast, forms part of the active site, making up the head and core of the one clamp, as well as the pore and funnel structures of RNAP II. The strong homology between Rpc1 and Rpb1 suggests a similar functional and structural role.
Pssm-ID: 259847 [Multi-domain] Cd Length: 816 Bit Score: 96.85 E-value: 9.11e-23
Largest subunit of RNA polymerase (RNAP), N-terminal domain; This region represents the ...
189-248
1.88e-17
Largest subunit of RNA polymerase (RNAP), N-terminal domain; This region represents the N-terminal domain of the largest subunit of RNA polymerase (RNAP). RNAP is a large multi-protein complex responsible for the synthesis of RNA. It is the principle 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 transcribes the ribosomal RNA precursor, RNAP II the mRNA precursor, and RNAP III the 5S and tRNA genes. A single distinct RNAP complex is found in prokaryotes and archaea, respectively, which may be responsible for the synthesis of all RNAs. Structure studies reveal that prokaryotic and eukaryotic RNAPs share a conserved crab-claw-shaped structure. The largest and the second largest subunits each make up one clamp, one jaw, and part of the cleft. All RNAPs are metalloenzymes. At least one Mg2+ ion is bound in the catalytic center. In addition, all cellular RNAPs contain several tightly bound zinc ions to different subunits that vary between RNAPs from prokaryotic to eukaryotic lineages. This domain represents the N-terminal region of the largest subunit of RNAP, and includes part of the active site. In archaea and some of the photosynthetic organisms or cellular organelle, however, this domain exists as a separate subunit.
Pssm-ID: 259843 [Multi-domain] Cd Length: 528 Bit Score: 80.94 E-value: 1.88e-17
Largest subunit (beta') of bacterial DNA-dependent RNA polymerase (RNAP), N-terminal domain; ...
118-248
9.57e-05
Largest subunit (beta') of bacterial DNA-dependent RNA polymerase (RNAP), N-terminal domain; Beta' is the largest subunit of bacterial DNA-dependent RNA polymerase (RNAP). This family also includes the eukaryotic plastid-encoded RNAP beta' subunit. Bacterial RNAP is a large multi-subunit complex responsible for the synthesis of all RNAs in the cell. Structure studies suggest that RNA polymerase complexes from different organisms share a crab-claw-shaped structure with two "pincers" defining a central cleft. Beta' and beta, the largest and the second largest subunits of bacterial RNAP, each makes up one pincer and part of the base of the cleft. Beta' contains part of the active site and binds two zinc ions that have a structural role in the formation of the active polymerase.
Pssm-ID: 259845 [Multi-domain] Cd Length: 659 Bit Score: 43.28 E-value: 9.57e-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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(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.
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