Annotations: 4KBM

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	RNA_pol_Rpb2_3	e4kbmA1	A: a+b complex topology	X: N-terminal domain in beta subunit of DNA dependent RNA-polymerase (From Topology)	H: N-terminal domain in beta subunit of DNA dependent RNA-polymerase (From Topology)	T: N-terminal domain in beta subunit of DNA dependent RNA-polymerase	F: RNA_pol_Rpb2_3	ECOD (1.6)
A	RNA_pol_Rpb2_1	e4kbmA2	A: a+b complex topology	X: insertion domain in beta subunit of DNA dependent RNA-polymerase (From Topology)	H: insertion domain in beta subunit of DNA dependent RNA-polymerase (From Topology)	T: insertion domain in beta subunit of DNA dependent RNA-polymerase	F: RNA_pol_Rpb2_1	ECOD (1.6)
B	CarD_CdnL_TRCF	e4kbmB3	A: beta barrels	X: SH3	H: SH3	T: SH3	F: CarD_CdnL_TRCF	ECOD (1.6)
B	CdnL	e4kbmB2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: CdnL	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1110.10	Alpha Beta	Alpha-Beta Complex	Dna-directed Rna Polymerase Ii 140kd Polypeptide	Chain: B	CATH (4.3.0)
B	2.40.10.170	Mainly Beta	Beta Barrel	Thrombin, subunit H		CATH (4.3.0)
B	1.20.58.1290	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF04561	RNA polymerase Rpb2, domain 2 (RNA_pol_Rpb2_2)	RNA polymerase Rpb2, domain 2	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 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
A	PF04563	RNA polymerase beta subunit (RNA_pol_Rpb2_1)	RNA polymerase beta subunit	-	Family
B	PF02559	CarD-like/TRCF RID domain (CarD_TRCF_RID)	CarD-like/TRCF RID domain	This is the RNA polymerase interacting domain (RID) of transcription-repair-coupling factor (TRCF), CarD and CarD homologue in Myxococcus xanthus, called CdnL. In Myxococcus xanthus, CdnL is a protein required for the activation of light- and starvat ...	This is the RNA polymerase interacting domain (RID) of transcription-repair-coupling factor (TRCF), CarD and CarD homologue in Myxococcus xanthus, called CdnL. In Myxococcus xanthus, CdnL is a protein required for the activation of light- and starvation-inducible genes [1]. It interacts with the zinc-binding protein CarG to form a complex that regulates multiple processes in Myxococcus xanthus [4]. CarD is widely distributed among bacteria and represents a distinct class of RNAP binding proteins that regulate transcription and essential processes [4-8]. TRCF displaces RNA polymerase stalled at a lesion, binds to the damage recognition protein UvrA, and increases the template strand repair rate during transcription [3].	Domain
B	PF21095	CarD, C-terminal (CarD_C)	CarD, C-terminal	This entry represents the C-terminal helical domain of CarD from Mycobacterium tuberculosis, a RNAP-binding protein that regulates transcription and essential processes [1-3]. This domain binds DNA in a non-specific manner [4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA-directed RNA polymerase subunit beta	DNA binding binding organic cyclic compound binding nucleic acid binding DNA-directed 5'-3' RNA polymerase activity 5'-3' RNA polymerase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA polymerase activity transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups ribonucleoside binding DNA binding binding organic cyclic compound binding nucleic acid binding DNA-directed 5'-3' RNA polymerase activity 5'-3' RNA polymerase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA polymerase activity transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups ribonucleoside binding nucleoside binding heterocyclic compound binding carbohydrate derivative binding small molecule binding	response to stimulus response to chemical response to antibiotic cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription response to stimulus response to chemical response to antibiotic cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription organic cyclic compound metabolic process nucleic acid biosynthetic process organic substance metabolic process biosynthetic process organic cyclic compound biosynthetic process organic substance biosynthetic process metabolic process cellular process macromolecule metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane external encapsulating structure cell wall peptidoglycan-based cell wall transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex RNA polymerase complex intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane external encapsulating structure cell wall peptidoglycan-based cell wall transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex RNA polymerase complex DNA-directed RNA polymerase complex transferase complex intracellular protein-containing complex
B	RNA polymerase-binding transcription factor CarD	-	cellular biosynthetic process RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process organic substance metabolic process rRNA transcription organic substance biosynthetic process rRNA metabolic process cellular metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression cellular biosynthetic process RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process organic substance metabolic process rRNA transcription organic substance biosynthetic process rRNA metabolic process cellular metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process organic cyclic compound metabolic process biosynthetic process ncRNA metabolic process organic cyclic compound biosynthetic process metabolic process cellular process macromolecule metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR007642	RNA polymerase Rpb2, domain 2	Domain
A	IPR015712	DNA-directed RNA polymerase, subunit 2	Family
A	IPR037033	DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamily	Homologous Superfamily
A	IPR042107	DNA-directed RNA polymerase, beta subunit, external 1 domain superfamily	Homologous Superfamily
A	IPR037034	RNA polymerase Rpb2, domain 2 superfamily	Homologous Superfamily
A	IPR007120	DNA-directed RNA polymerase, subunit 2, hybrid-binding domain	Domain
A	IPR007121	RNA polymerase, beta subunit, conserved site	Conserved Site
A	IPR007645	RNA polymerase Rpb2, domain 3	Domain
A	IPR014724	RNA polymerase Rpb2, OB-fold	Homologous Superfamily
A	IPR019462	DNA-directed RNA polymerase, beta subunit, external 1 domain	Domain
A	IPR010243	DNA-directed RNA polymerase beta subunit, bacterial-type	Family
A	IPR007644	RNA polymerase, beta subunit, protrusion	Domain
A	IPR007641	RNA polymerase Rpb2, domain 7	Domain
B	IPR042215	CarD-like, C-terminal domain	Homologous Superfamily
B	IPR048792	CarD, C-terminal domain	Domain
B	IPR036101	CarD-like/TRCF, RNAP-interacting domain superfamily	Homologous Superfamily
B	IPR003711	CarD-like/TRCF, RNAP-interacting domain	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.