Annotations: 1AY7

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ay7a_	Alpha and beta proteins (a+b)	Microbial ribonucleases	Microbial ribonucleases	Bacterial ribonucleases	RNase Sa	(Kitasatospora aureofaciens ) [TaxId: 1894 ],	SCOPe (2.08)
B	d1ay7b_	Alpha and beta proteins (a/b)	Barstar-like	Barstar-related	Barstar-related	Barstar (barnase inhibitor)	(Bacillus amyloliquefaciens ) [TaxId: 1390 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Microbial ribonucleases	8041326	3001847	SCOP2B (2022-06-29)
B	SCOP2 Family	Barstar-related	8031591	4003513	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Barstar-related	8043969	3000977	SCOP2 (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	Ribonuclease	e1ay7A1	A: a+b two layers	X: Microbial ribonucleases-like	H: Microbial ribonucleases (From Topology)	T: Microbial ribonucleases	F: Ribonuclease	ECOD (1.6)
B	Barstar	e1ay7B1	A: a/b three-layered sandwiches	X: Barstar (barnase inhibitor) (From Topology)	H: Barstar (barnase inhibitor) (From Topology)	T: Barstar (barnase inhibitor)	F: Barstar	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.10.450.30	Alpha Beta	Roll	Nuclear Transport Factor 2	Chain: A,	CATH (4.3.0)
B	3.30.370.10	Alpha Beta	2-Layer Sandwich	Barnase	Chain D	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00545	ribonuclease (Ribonuclease)	ribonuclease	This enzyme hydrolyses RNA and oligoribonucleotides.	Domain
B	PF01337	Barstar (barnase inhibitor) (Barstar)	Barstar (barnase inhibitor)		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	GUANYL-SPECIFIC RIBONUCLEASE SA	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity catalytic activity ribonuclease T1 activity lyase activity RNA binding binding nucleic acid binding	-	cellular anatomical structure extracellular region
B	BARSTAR	-	-	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000026	Guanine-specific ribonuclease N1-like	Family
A	IPR016191	Ribonuclease/ribotoxin	Homologous Superfamily
B	IPR000468	Barstar (barnase inhibitor)	Domain
B	IPR035905	Barstar-like superfamily	Homologous Superfamily

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.