Annotations: 2IX1

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2ix1a2	All beta proteins	OB-fold	Nucleic acid-binding proteins	Cold shock DNA-binding domain-like	Exoribonuclease 2, RNB, C-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d2ix1a1	All beta proteins	OB-fold	Nucleic acid-binding proteins	Cold shock DNA-binding domain-like	Exoribonuclease 2, RNB, middle domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d2ix1a3	All beta proteins	OB-fold	Nucleic acid-binding proteins	Cold shock DNA-binding domain-like	Exoribonuclease 2, RNB, N-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d2ix1a4	All beta proteins	OB-fold	Nucleic acid-binding proteins	RNB domain-like	Exoribonuclease 2, RNB	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d2ix1a5	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8034598	3000135	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8034599	3000135	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8034600	3000135	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nucleic acid-binding proteins	8034601	3000135	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	OB_RNB	e2ix1A2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: OB_RNB	ECOD (1.6)
A	S1_1	e2ix1A3	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: S1_1	ECOD (1.6)
A	PRK05054	e2ix1A1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: PRK05054	ECOD (1.6)
A	RNB	e2ix1A4	A: beta barrels	X: OB-fold	H: RNB domain-like (From Topology)	T: RNB domain-like	F: RNB	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.50.140	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Nucleic acid-binding proteins	CATH (4.3.0)
A	2.40.50.640	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00575	S1 RNA binding domain (S1)	S1 RNA binding domain	The S1 domain occurs in a wide range of RNA associated proteins. It is structurally similar to cold shock protein which binds nucleic acids. The S1 domain has an OB-fold structure.	Domain
A	PF00773	RNB domain (RNB)	RNB domain	This domain is the catalytic domain of ribonuclease II [1].	Domain
A	PF08206	Ribonuclease B OB domain (OB_RNB)	Ribonuclease B OB domain	This family includes the N-terminal OB domain found in ribonuclease B proteins in one or two copies.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	EXORIBONUCLEASE 2	nuclease activity hydrolase activity, acting on ester bonds 3'-5' exonuclease activity hydrolase activity exonuclease activity catalytic activity 3'-5'-RNA exonuclease activity catalytic activity, acting on RNA RNA exonuclease activity, producing 5'-phosphomonoesters catalytic activity, acting on a nucleic acid RNA exonuclease activity RNA nuclease activity exoribonuclease II activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters nuclease activity hydrolase activity, acting on ester bonds 3'-5' exonuclease activity hydrolase activity exonuclease activity catalytic activity 3'-5'-RNA exonuclease activity catalytic activity, acting on RNA RNA exonuclease activity, producing 5'-phosphomonoesters catalytic activity, acting on a nucleic acid RNA exonuclease activity RNA nuclease activity exoribonuclease II activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters RNA binding binding organic cyclic compound binding nucleic acid binding	catabolic process RNA metabolic process primary metabolic process nucleic acid metabolic process macromolecule catabolic process nucleobase-containing compound catabolic process tRNA metabolic process nucleobase-containing compound metabolic process nucleic acid catabolic process metabolic process cellular process macromolecule metabolic process tRNA decay RNA catabolic process catabolic process RNA metabolic process primary metabolic process nucleic acid metabolic process macromolecule catabolic process nucleobase-containing compound catabolic process tRNA metabolic process nucleobase-containing compound metabolic process nucleic acid catabolic process metabolic process cellular process macromolecule metabolic process tRNA decay RNA catabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process 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 regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process regulation of metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol
B	5'-D(APAPAPAPAPAPAPAPAPAP APAP*A)-3'	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011129	Cold-shock domain	Domain
A	IPR003029	S1 domain	Domain
A	IPR013223	Ribonuclease B, N-terminal OB domain	Domain
A	IPR050180	RNR Ribonuclease	Family
A	IPR022966	Ribonuclease II/R, conserved site	Conserved Site
A	IPR004476	Ribonuclease II/ribonuclease R	Family
A	IPR001900	Ribonuclease II/R	Domain
A	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
A	IPR011804	Ribonuclease II	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 R01GM157729.