8XA8 | pdb_00008xa8

Cryo-EM structure of Bacillus RNAP and HelD complex


Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
H [auth I]SCOP2B SuperfamilyWinged helix DNA-binding domain 8103637 3000034 SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF01193RNA polymerase Rpb3/Rpb11 dimerisation domain (RNA_pol_L)RNA polymerase Rpb3/Rpb11 dimerisation domainThe two eukaryotic subunits Rpb3 and Rpb11 dimerise 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 dimerisation do ...The two eukaryotic subunits Rpb3 and Rpb11 dimerise 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 dimerisation domain of the alpha subunit/Rpb3 is interrupted by an insert domain (Pfam:PF01000). Some of the alpha subunits also contain iron-sulphur binding domains (Pfam:PF00037). 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.
Domain
A, B
PF01000RNA polymerase Rpb3/RpoA insert domain (RNA_pol_A_bac)RNA polymerase Rpb3/RpoA insert domainMembers of this family include: alpha subunit from eubacteria alpha subunits from chloroplasts Rpb3 subunits from eukaryotes RpoD subunits from archaeal Domain
C [auth D]PF00623RNA polymerase Rpb1, domain 2 (RNA_pol_Rpb1_2)RNA polymerase Rpb1, domain 2RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 2, contains the active site ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 2, contains the active site. The invariant motif -NADFDGD- binds the active site magnesium ion [1,2].
Domain
C [auth D]PF05000RNA polymerase Rpb1, domain 4 (RNA_pol_Rpb1_4)RNA polymerase Rpb1, domain 4RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 4, represents the funnel do ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 4, represents the funnel domain. The funnel contain the binding site for some elongation factors [1,2].
Domain
C [auth D]PF04983RNA polymerase Rpb1, domain 3 (RNA_pol_Rpb1_3)RNA polymerase Rpb1, domain 3RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 3, represents the pore doma ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 3, represents the pore domain. The 3' end of RNA is positioned close to this domain. The pore delimited by this domain is thought to act as a channel through which nucleotides enter the active site and/or where the 3' end of the RNA may be extruded during back-tracking [1,2].
Domain
C [auth D]PF04998RNA polymerase Rpb1, domain 5 (RNA_pol_Rpb1_5)RNA polymerase Rpb1, domain 5RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 5, represents the discontin ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain, domain 5, represents the discontinuous cleft domain that is required to from the central cleft or channel where the DNA is bound [1,2].
Domain
C [auth D]PF04997RNA polymerase Rpb1, domain 1 (RNA_pol_Rpb1_1)RNA polymerase Rpb1, domain 1RNA polymerases catalyse the DNA dependent polymerisation 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 dom ...RNA polymerases catalyse the DNA dependent polymerisation 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 [1,2].
Domain
D [auth E]PF07288RNA polymerase epsilon subunit (RpoY)RNA polymerase epsilon subunitRNA polymerase in bacteria is a multisubunit protein complex that is essential for gene expression. This entry represents the epsilon subunit encoded by the rpoY gene. The structure of epsilon shows simple beta sheet with an alpha helix running diago ...RNA polymerase in bacteria is a multisubunit protein complex that is essential for gene expression. This entry represents the epsilon subunit encoded by the rpoY gene. The structure of epsilon shows simple beta sheet with an alpha helix running diagonally along the back of the structure forming a beta-beta-alpha-beta fold [1].
Domain
E [auth F]PF01192RNA polymerase Rpb6 (RNA_pol_Rpb6)RNA polymerase Rpb6- Family
F [auth H]PF13538UvrD-like helicase C-terminal domain (UvrD_C_2)UvrD-like helicase C-terminal domainThis domain is found at the C-terminus of a wide variety of helicase enzymes. This domain has a AAA-like structural fold. Domain
F [auth H]PF00580UvrD/REP helicase N-terminal domain (UvrD-helicase)UvrD/REP helicase N-terminal domainThe Rep family helicases are composed of four structural domains. The Rep family function as dimers. REP helicases catalyse ATP dependent unwinding of double stranded DNA to single stranded DNA. Swiss:P23478, Swiss:P08394 have large insertions near t ...The Rep family helicases are composed of four structural domains. The Rep family function as dimers. REP helicases catalyse ATP dependent unwinding of double stranded DNA to single stranded DNA. Swiss:P23478, Swiss:P08394 have large insertions near to the carboxy-terminus relative to other members of the family.
Domain
G [auth C]PF04561RNA polymerase Rpb2, domain 2 (RNA_pol_Rpb2_2)RNA polymerase Rpb2, domain 2RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Rpb2 is the second largest subunit of the RNA po ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Rpb2 is the second largest subunit of the RNA polymerase. This domain forms one of the two distinctive lobes of the Rpb2 structure. This domain is also known as the lobe domain [1]. DNA has been demonstrated to bind to the concave surface of the lobe domain, and plays a role in maintaining the transcription bubble [1]. Many of the bacterial members contain large insertions within this domain, as region known as dispensable region 1 (DRI).
Domain
G [auth C]PF10385RNA polymerase beta subunit external 1 domain (RNA_pol_Rpb2_45)RNA polymerase beta subunit external 1 domainRNA polymerases catalyse the DNA-dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared with three in eukaryotes (not including mitochondrial or chloroplast polymerases). This domain in prokaryotes spans the gap between ...RNA polymerases catalyse the DNA-dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared with three in eukaryotes (not including mitochondrial or chloroplast polymerases). This domain in prokaryotes spans the gap between domains 4 and 5 of the yeast protein. It is also known as the external 1 region of the polymerase and is bound in association with the external 2 region [1].
Domain
G [auth C]PF04560RNA polymerase Rpb2, domain 7 (RNA_pol_Rpb2_7)RNA polymerase Rpb2, domain 7RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Rpb2 is the second largest subunit of the RNA p ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Rpb2 is the second largest subunit of the RNA polymerase. This domain comprised of the structural domains anchor and clamp [1]. The clamp region (C-terminal) contains a zinc-binding motif [1]. The clamp region is named due to its interaction with the clamp domain found in Rpb1. The domain also contains a region termed "switch 4". The switches within the polymerase are thought to signal different stages of transcription [1].
Domain
G [auth C]PF04565RNA polymerase Rpb2, domain 3 (RNA_pol_Rpb2_3)RNA polymerase Rpb2, domain 3RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Domain 3, s also known as the fork domain and is ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). Domain 3, s also known as the fork domain and is proximal to catalytic site [1].
Domain
G [auth C]PF04563RNA polymerase beta subunit (RNA_pol_Rpb2_1)RNA polymerase beta subunit- Family
G [auth C]PF00562RNA polymerase Rpb2, domain 6 (RNA_pol_Rpb2_6)RNA polymerase Rpb2, domain 6RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain represents the hybrid binding domain ...RNA polymerases catalyse the DNA dependent polymerisation of RNA. Prokaryotes contain a single RNA polymerase compared to three in eukaryotes (not including mitochondrial. and chloroplast polymerases). This domain represents the hybrid binding domain and the wall domain [1]. The hybrid binding domain binds the nascent RNA strand / template DNA strand in the Pol II transcription elongation complex. This domain contains the important structural motifs, switch 3 and the flap loop and binds an active site metal ion[1]. This domain is also involved in binding to Rpb1 and Rpb3 [1]. Many of the bacterial members contain large insertions within this domain, as region known as dispensable region 2 (DRII).
Domain
H [auth I]PF05066HB1, ASXL, restriction endonuclease HTH domain (HARE-HTH)HB1, ASXL, restriction endonuclease HTH domain- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
DNA-directed RNA polymerase subunit alpha
C [auth D]DNA-directed RNA polymerase subunit beta'
D [auth E]DNA-directed RNA polymerase subunit epsilon
E [auth F]DNA-directed RNA polymerase subunit omega
F [auth H]DNA helicase IV
G [auth C]DNA-directed RNA polymerase subunit beta
H [auth I]DNA-directed RNA polymerase subunit delta

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B
IPR011773DNA-directed RNA polymerase, alpha subunitFamily
A, B
IPR011262DNA-directed RNA polymerase, insert domainDomain
A, B
IPR011260RNA polymerase, alpha subunit, C-terminalDomain
A, B
IPR011263DNA-directed RNA polymerase, RpoA/D/Rpb3-typeDomain
A, B
IPR036643DNA-directed RNA polymerase, insert domain superfamilyHomologous Superfamily
A, B
IPR036603RNA polymerase, RBP11-like subunitHomologous Superfamily
C [auth D]IPR007066RNA polymerase Rpb1, domain 3Domain
C [auth D]IPR007081RNA polymerase Rpb1, domain 5Domain
C [auth D]IPR045867DNA-directed RNA polymerase, subunit beta-primeFamily
C [auth D]IPR012754DNA-directed RNA polymerase, subunit beta-prime, bacterial typeFamily
C [auth D]IPR042102RNA polymerase Rpb1, domain 3 superfamilyHomologous Superfamily
C [auth D]IPR007083RNA polymerase Rpb1, domain 4Domain
C [auth D]IPR000722RNA polymerase, alpha subunitDomain
C [auth D]IPR044893RNA polymerase Rpb1, clamp domain superfamilyHomologous Superfamily
C [auth D]IPR038120RNA polymerase Rpb1, funnel domain superfamilyHomologous Superfamily
C [auth D]IPR006592RNA polymerase, N-terminalDomain
C [auth D]IPR007080RNA polymerase Rpb1, domain 1Domain
D [auth E]IPR009907RNA polymerase epsilon subunitFamily
E [auth F]IPR036161RPB6/omega subunit-like superfamilyHomologous Superfamily
E [auth F]IPR003716DNA-directed RNA polymerase, omega subunitFamily
E [auth F]IPR006110RNA polymerase, subunit omega/Rpo6/RPB6Family
F [auth H]IPR027785UvrD-like helicase C-terminal domainDomain
F [auth H]IPR014016UvrD-like helicase, ATP-binding domainDomain
F [auth H]IPR000212DNA helicase, UvrD/REP typeFamily
F [auth H]IPR048228RNA polymerase recycling motor HelD-like, bacillotaFamily
F [auth H]IPR027417P-loop containing nucleoside triphosphate hydrolaseHomologous Superfamily
G [auth C]IPR007642RNA polymerase Rpb2, domain 2Domain
G [auth C]IPR015712DNA-directed RNA polymerase, subunit 2Family
G [auth C]IPR037033DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamilyHomologous Superfamily
G [auth C]IPR037034RNA polymerase Rpb2, domain 2 superfamilyHomologous Superfamily
G [auth C]IPR007120DNA-directed RNA polymerase, subunit 2, hybrid-binding domainDomain
G [auth C]IPR007121RNA polymerase, beta subunit, conserved siteConserved Site
G [auth C]IPR007645RNA polymerase Rpb2, domain 3Domain
G [auth C]IPR014724RNA polymerase Rpb2, OB-foldHomologous Superfamily
G [auth C]IPR019462DNA-directed RNA polymerase, beta subunit, external 1 domainDomain
G [auth C]IPR010243DNA-directed RNA polymerase beta subunit, bacterial-typeFamily
G [auth C]IPR007644RNA polymerase, beta subunit, protrusionDomain
G [auth C]IPR007641RNA polymerase Rpb2, domain 7Domain
H [auth I]IPR029757DNA-directed RNA polymerase subunit deltaFamily
H [auth I]IPR038087DNA-directed RNA polymerase subunit delta, N-terminal domain superfamilyHomologous Superfamily
H [auth I]IPR007759ASXL, HARE-HTH domainDomain