Annotations: 9EXS

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	CoV_nucleocap	e9exsB01	A: alpha bundles	X: Helical bundle insertion in helicase domains	H: Helical bundle in Hef helicase	T: Helical bundle in Hef helicase	F: CoV_nucleocap	ECOD (develop294)
A	CoV_nucleocap	e9exsA01	A: alpha bundles	X: Helical bundle insertion in helicase domains	H: Helical bundle in Hef helicase	T: Helical bundle in Hef helicase	F: CoV_nucleocap	ECOD (develop294)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF17846	Xrn1 helical domain (XRN_M)	Xrn1 helical domain	This helical domain is part of the Xrn1 catalytic core [1]. Xrn1 is a cytoplasmic 5'-3' exonuclease that degrades decapped mRNAs.	Domain
A	PF08652	RAI1 like PD-(D/E)XK nuclease (RAI1)	RAI1 like PD-(D/E)XK nuclease	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	5'-3' exoribonuclease	5'-3' RNA exonuclease activity 5'-3' exonuclease activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA exonuclease activity, producing 5'-phosphomonoesters RNA exonuclease activity RNA nuclease activity hydrolase activity hydrolase activity, acting on ester bonds nuclease activity exonuclease activity catalytic activity RNA binding binding 5'-3' RNA exonuclease activity 5'-3' exonuclease activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA exonuclease activity, producing 5'-phosphomonoesters RNA exonuclease activity RNA nuclease activity hydrolase activity hydrolase activity, acting on ester bonds nuclease activity exonuclease activity catalytic activity RNA binding binding nucleic acid binding cation binding ion binding metal ion binding small molecule binding	regulation of cellular process catabolic process negative regulation of biological process RNA metabolic process macromolecule catabolic process nucleobase-containing compound metabolic process negative regulation of cellular process RNA catabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process nuclear-transcribed mRNA catabolic process regulation of biological process negative regulation of metabolic process regulation of cellular process catabolic process negative regulation of biological process RNA metabolic process macromolecule catabolic process nucleobase-containing compound metabolic process negative regulation of cellular process RNA catabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process nuclear-transcribed mRNA catabolic process regulation of biological process negative regulation of metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process mRNA metabolic process nucleic acid metabolic process nucleobase-containing compound catabolic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process nucleobase-containing compound biosynthetic process DNA-templated transcription termination RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process ribonucleoprotein complex biogenesis rRNA processing cellular component biogenesis ribosome biogenesis cellular component organization or biogenesis RNA processing rRNA metabolic process mRNA processing	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle
A	Decapping nuclease	nuclease activity catalytic activity, acting on a nucleic acid catalytic activity RNA binding binding nucleic acid binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding cation binding ion binding metal ion binding pyrophosphatase activity nuclease activity catalytic activity, acting on a nucleic acid catalytic activity RNA binding binding nucleic acid binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding cation binding ion binding metal ion binding pyrophosphatase activity mRNA 5'-diphosphatase activity catalytic activity, acting on RNA hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides	NAD-cap decapping nucleobase-containing compound metabolic process RNA metabolic process metabolic process cellular process primary metabolic process macromolecule metabolic process nucleic acid metabolic process RNA decapping regulation of cellular process catabolic process negative regulation of biological process macromolecule catabolic process negative regulation of cellular process NAD-cap decapping nucleobase-containing compound metabolic process RNA metabolic process metabolic process cellular process primary metabolic process macromolecule metabolic process nucleic acid metabolic process RNA decapping regulation of cellular process catabolic process negative regulation of biological process macromolecule catabolic process negative regulation of cellular process RNA catabolic process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process nuclear-transcribed mRNA catabolic process regulation of biological process negative regulation of metabolic process biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process mRNA metabolic process nucleobase-containing compound catabolic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process regulation of macromolecule biosynthetic process regulation of metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR027073	5'-3' exoribonuclease	Family
B	IPR041412	Xrn1, helical domain	Domain
B	IPR004859	Xrn1, N-terminal	Domain
B	IPR017151	5'-3' exoribonuclease type 2	Family
A	IPR039039	RAI1-like family	Family
A	IPR013961	RAI1-like	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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.