Annotations: 6T2C

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Flu_PB1_2nd	e6t2cB2	A: alpha bundles	X: helical bundle domain in reverse transcriptase-like polymerases (From Topology)	H: helical bundle domain in reverse transcriptase-like polymerases (From Topology)	T: helical bundle domain in reverse transcriptase-like polymerases	F: Flu_PB1_2nd	ECOD (1.6)
B	Flu_PB1_1st	e6t2cB1	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: Flu_PB1_1st	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C	PF20949	Influenza RNA polymerase PB2 middle domain (Flu_PB2_3rd)	Influenza RNA polymerase PB2 middle domain	Influenza virus encodes a large, multidomain RNA-dependent RNA polymerase that can both transcribe and replicate the viral RNA genome. In influenza virus, the polymerase is composed of three polypeptides: PB1, PB2 and PA/P3. PB1 houses the polymerase ...	Influenza virus encodes a large, multidomain RNA-dependent RNA polymerase that can both transcribe and replicate the viral RNA genome. In influenza virus, the polymerase is composed of three polypeptides: PB1, PB2 and PA/P3. PB1 houses the polymerase active site, whereas PB2 and PA/P3 contain, respectively, cap-binding [1] and endonuclease domains required for transcription initiation by cap-snatching [2]. This entry represents the middle domain in Flu PB2 protein.	Domain
B	PF00602	Influenza RNA-dependent RNA polymerase subunit PB1 (Flu_PB1)	Influenza RNA-dependent RNA polymerase subunit PB1	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Polymerase acidic protein	RNA binding binding organic cyclic compound binding nucleic acid binding cation binding ion binding metal ion binding small molecule binding	cellular biosynthetic process cellular metabolic process RNA metabolic process viral life cycle primary metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process viral genome replication biosynthetic process viral RNA genome replication viral process cellular biosynthetic process cellular metabolic process RNA metabolic process viral life cycle primary metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process viral genome replication biosynthetic process viral RNA genome replication viral process metabolic process cellular process macromolecule metabolic process	-
C	Polymerase basic protein 2	RNA binding binding organic cyclic compound binding nucleic acid binding	symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host transcription symbiont-mediated suppression of host gene expression symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity modulation by symbiont of host process symbiont-mediated perturbation of host gene expression cellular process symbiont-mediated perturbation of host transcription modulation of process of another organism viral gene expression cap snatching symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host transcription symbiont-mediated suppression of host gene expression symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity modulation by symbiont of host process symbiont-mediated perturbation of host gene expression cellular process symbiont-mediated perturbation of host transcription modulation of process of another organism viral gene expression cap snatching negative stranded viral RNA transcription viral process viral transcription RNA-templated viral transcription 7-methylguanosine mRNA capping cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process 7-methylguanosine RNA capping RNA capping gene expression nucleobase-containing compound biosynthetic process macromolecule biosynthetic process mRNA processing mRNA metabolic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process biosynthetic process RNA 5'-end processing metabolic process RNA processing macromolecule metabolic process DNA-templated transcription	host intracellular membrane-bounded organelle host cellular component host intracellular part host cell cytoplasm host cell part host intracellular region cellular anatomical entity host cell mitochondrion host cell cytoplasm part host intracellular organelle host cell nucleus virion component
D [auth V]	vRNA	-	-	-
B	RNA-directed RNA polymerase catalytic subunit	5'-3' RNA polymerase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA polymerase activity transferase activity RNA-dependent RNA polymerase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups RNA binding binding organic cyclic compound binding nucleic acid binding nucleoside phosphate binding 5'-3' RNA polymerase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA polymerase activity transferase activity RNA-dependent RNA polymerase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups RNA binding binding organic cyclic compound binding nucleic acid binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding	symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host transcription symbiont-mediated suppression of host gene expression symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity modulation by symbiont of host process symbiont-mediated perturbation of host gene expression cellular process symbiont-mediated perturbation of host transcription modulation of process of another organism cellular biosynthetic process cellular metabolic process symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host transcription symbiont-mediated suppression of host gene expression symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity modulation by symbiont of host process symbiont-mediated perturbation of host gene expression cellular process symbiont-mediated perturbation of host transcription modulation of process of another organism cellular biosynthetic process cellular metabolic process RNA metabolic process viral life cycle primary metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process viral genome replication biosynthetic process viral RNA genome replication viral process metabolic process macromolecule metabolic process viral gene expression viral transcription	host intracellular membrane-bounded organelle host cellular component host intracellular part host cell part host intracellular region cellular anatomical entity host cell nucleus host intracellular organelle intracellular anatomical structure cytoplasm host cell cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001009	Influenza RNA-dependent RNA polymerase subunit PA	Family
A	IPR038372	Influenza RNA-dependent RNA polymerase subunit PA, endonuclease domain	Homologous Superfamily
C	IPR049106	Influenza RNA polymerase PB2, N-terminal region	Domain
C	IPR049115	Influenza RNA polymerase PB2, C-terminal domain	Domain
C	IPR049110	Influenza RNA polymerase PB2, second domain	Domain
C	IPR049114	Influenza RNA polymerase PB2, sixth domain	Domain
C	IPR049113	Polymerase basic protein 2, helical domain	Domain
C	IPR049111	Influenza RNA polymerase PB2, middle domain	Domain
C	IPR048298	Influenza RNA polymerase PB2, CAP binding domain	Domain
C	IPR037258	PB2, C-terminal	Homologous Superfamily
B	IPR007099	RNA-directed RNA polymerase, negative-strand RNA virus	Domain
B	IPR001407	Influenza RNA-dependent RNA polymerase subunit PB1	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.