Annotations: 3SPA

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	RPOL_N	e3spaA7	A: alpha arrays	X: HTH	H: HTH	T: HTH in T7 RNA polymerase	F: RPOL_N	ECOD (1.6)
A	RNA_pol_2nd	e3spaA1	A: alpha arrays	X: helical bundle in Bacillus stearothermophilus-like DNA polymerase I (From Topology)	H: helical bundle in Bacillus stearothermophilus-like DNA polymerase I (From Topology)	T: helical bundle in Bacillus stearothermophilus-like DNA polymerase I	F: RNA_pol_2nd	ECOD (1.6)
A	RNA_pol_1st	e3spaA2	A: alpha arrays	X: inserted helical bundle subdomain in T7 RNA polymerase (From Topology)	H: inserted helical bundle subdomain in T7 RNA polymerase (From Topology)	T: inserted helical bundle subdomain in T7 RNA polymerase	F: RNA_pol_1st	ECOD (1.6)
A	KOG1038,RPOL_N	e3spaA5	A: alpha bundles	X: fingers domain in bacteriophage RB69-like DNA polymerase I (From Topology)	H: fingers domain in bacteriophage RB69-like DNA polymerase I (From Topology)	T: fingers domain in bacteriophage RB69-like DNA polymerase I	F: KOG1038,RPOL_N	ECOD (1.6)
A	PPR_long	e3spaA6	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: PPR_long	ECOD (1.6)
A	RNA_pol_3rd	e3spaA4	A: a+b two layers	X: Alpha-beta plaits	H: Adenylyl and guanylyl cyclase catalytic domain-like	T: Adenylyl and guanylyl cyclase catalytic domain-like	F: RNA_pol_3rd	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF14700	DNA-directed RNA polymerase N-terminal (RPOL_N)	DNA-directed RNA polymerase N-terminal	This is the N-terminal domain of DNA-directed RNA polymerase. This domain has a role in interaction with regions of upstream promoter DNA and the nascent RNA chain, leading to the processivity of the enzyme [1]. In order to make mRNA transcripts the ...	This is the N-terminal domain of DNA-directed RNA polymerase. This domain has a role in interaction with regions of upstream promoter DNA and the nascent RNA chain, leading to the processivity of the enzyme [1]. In order to make mRNA transcripts the RNA polymerase undergoes a transition from the initiation phase (which only makes short fragments of RNA) to an elongation phase. This domain undergoes a structural change in the transition from initiation to elongation phase. The structural change results in abolition of the promoter binding site, creation of a channel accommodating the heteroduplex in the active site and formation of an exit tunnel which the RNA transcript passes through after peeling off the heteroduplex [2].	Domain
A	PF00940	DNA-dependent RNA polymerase (RNA_pol)	DNA-dependent RNA polymerase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA-directed RNA polymerase, mitochondrial	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 DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding 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 DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding organic cyclic compound binding nucleic acid binding transcription regulatory region nucleic acid binding mitochondrial promoter sequence-specific DNA binding 3'-5'-RNA exonuclease activity RNA exonuclease activity, producing 5'-phosphomonoesters 3'-5' exonuclease activity RNA exonuclease activity RNA nuclease activity hydrolase activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters nuclease activity hydrolase activity, acting on ester bonds exonuclease activity DNA primase activity RNA binding	cellular biosynthetic process RNA metabolic process mitochondrial gene expression nucleobase-containing compound metabolic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process organic substance metabolic process heterocycle metabolic process organic substance biosynthetic process nitrogen compound metabolic process transcription initiation at mitochondrial promoter cellular metabolic process cellular nitrogen compound metabolic process cellular biosynthetic process RNA metabolic process mitochondrial gene expression nucleobase-containing compound metabolic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process organic substance metabolic process heterocycle metabolic process organic substance biosynthetic process nitrogen compound metabolic process transcription initiation at mitochondrial promoter cellular metabolic process cellular nitrogen compound metabolic process primary metabolic process gene expression nucleobase-containing compound biosynthetic process heterocycle biosynthetic process mitochondrial transcription macromolecule biosynthetic process nucleic acid metabolic process DNA-templated transcription initiation organic cyclic compound metabolic process biosynthetic process aromatic compound biosynthetic process organic cyclic compound biosynthetic process metabolic process cellular process macromolecule metabolic process mitochondrial RNA metabolic process cellular aromatic compound metabolic process	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial protein-containing complex protein-containing complex catalytic complex transferase complex transferase complex, transferring phosphorus-containing groups RNA polymerase complex membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial protein-containing complex protein-containing complex catalytic complex transferase complex transferase complex, transferring phosphorus-containing groups RNA polymerase complex mitochondrial DNA-directed RNA polymerase complex DNA-directed RNA polymerase complex intracellular protein-containing complex membrane-enclosed lumen nucleoid mitochondrial matrix intracellular organelle lumen organelle lumen intracellular non-membrane-bounded organelle mitochondrial nucleoid non-membrane-bounded organelle
B	Nonamer peptide	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR029262	DNA-directed RNA polymerase, N-terminal	Domain
A	IPR002092	DNA-directed RNA polymerase, phage-type	Family
A	IPR011990	Tetratricopeptide-like helical domain superfamily	Homologous Superfamily
A	IPR043502	DNA/RNA polymerase superfamily	Homologous Superfamily
A	IPR046950	DNA-directed RNA polymerase, C-terminal domain, phage-type	Domain
A	IPR037159	DNA-directed RNA polymerase, N-terminal domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: O00411	osteosarcoma ovarian cancer

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.