Annotations: 6Q99

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	capSnatchArena	e6q99A1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: capSnatchArena	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21991	Cap-snatching endonuclease (capSnatchArena)	Cap-snatching endonuclease	The cap-snatching endonuclease family is a group of enzymes found in segmented negative strand RNA viruses of the arena-, bunya-, and orthomyxovirus families. The viruses use cap-snatching to transcribe viral mRNA, which involves cleaving the host mR ...	The cap-snatching endonuclease family is a group of enzymes found in segmented negative strand RNA viruses of the arena-, bunya-, and orthomyxovirus families. The viruses use cap-snatching to transcribe viral mRNA, which involves cleaving the host mRNA near its 5' end and is accomplished by an endonuclease (EN) domain located in the N-terminal region of the viral polymerase. The cap-snatching ENs belong to the PD-D/ExK superfamily of cation-dependent nucleases and have an active site configuration that includes two divalent metal ions and a histidine residue. The available structures of the influenza orthomyxovirus and LACV orthobunyavirus show the canonical conformation of the active site, while the arenavirus ENs show differences in their active sites, such as the replacement of the metal-coordinating histidine with an acidic residue in arenavirus ENs. The Hantaan virus cap-snatching EN has been structurally characterized, revealing high endonuclease activity, while the Lassa virus endonuclease has low intrinsic activity due to its non-canonical coordination of the catalytic metal ions.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	RNA polymerase	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 binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound 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 binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity cation binding ion binding metal ion 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 viral gene expression cap snatching negative stranded viral RNA transcription viral transcription RNA-templated viral transcription gene expression DNA-templated transcription	host cellular component host intracellular part host cell perinuclear region of cytoplasm host cell cytoplasm host cell part host intracellular region cellular anatomical entity host cell cytoplasm part

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR007099	RNA-directed RNA polymerase, negative-strand RNA virus	Domain
A	IPR016268	RNA-directed RNA polymerase, hantavirus	Family
A	IPR054155	Cap-snatching endonuclease, N-terminal	Domain
A	IPR007322	RNA-dependent RNA polymerase, bunyaviral	Domain
A	IPR024378	RNA-directed RNA polymerase, hantavirus, N-terminal	Domain
A	IPR048006	RNA endonuclease, cap-snatching, bunyaviral	Domain

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 R01GM157729.