Annotations: 2IXS

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF17728	e2ixsA1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: PF17728	ECOD (1.6)
A	PF06616	e2ixsA2	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: PF06616	ECOD (1.6)
B	PF17728	e2ixsB2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: PF17728	ECOD (1.6)
B	PF06616	e2ixsB1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: PF06616	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.1820	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	BsuBI/PstI restriction endonuclease, N-terminal domain	CATH (4.3.0)
A	3.40.1350.80	Alpha Beta	3-Layer(aba) Sandwich	Trna Endonuclease	Chain: A, domain 1	CATH (4.3.0)
B	1.10.10.1820	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	BsuBI/PstI restriction endonuclease, N-terminal domain	CATH (4.3.0)
B	3.40.1350.80	Alpha Beta	3-Layer(aba) Sandwich	Trna Endonuclease	Chain: A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF17728	BsuBI/PstI restriction endonuclease HTH domain (BsuBI_PstI_RE_N)	BsuBI/PstI restriction endonuclease HTH domain	This family represents the C-terminus of bacterial enzymes similar to type II restriction endonucleases BsuBI and PstI (EC:3.1.21.4). The enzymes of the BsuBI restriction/modification (R/M) system recognise the target sequence 5'CTGCAG and are functi ...	This family represents the C-terminus of bacterial enzymes similar to type II restriction endonucleases BsuBI and PstI (EC:3.1.21.4). The enzymes of the BsuBI restriction/modification (R/M) system recognise the target sequence 5'CTGCAG and are functionally identical with those of the PstI R/M system [1].	Domain
A, B	PF06616	BsuBI/PstI restriction endonuclease domain (BsuBI_PstI_RE)	BsuBI/PstI restriction endonuclease domain	This family represents the C-terminus of bacterial enzymes similar to type II restriction endonucleases BsuBI and PstI (EC:3.1.21.4). The enzymes of the BsuBI restriction/modification (R/M) system recognise the target sequence 5'CTGCAG and are functi ...	This family represents the C-terminus of bacterial enzymes similar to type II restriction endonucleases BsuBI and PstI (EC:3.1.21.4). The enzymes of the BsuBI restriction/modification (R/M) system recognise the target sequence 5'CTGCAG and are functionally identical with those of the PstI R/M system [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	SDAI RESTRICTION ENDONUCLEASE	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding DNA binding organic cyclic compound binding nucleic acid binding endonuclease activity catalytic activity, acting on a nucleic acid endodeoxyribonuclease activity, producing 5'-phosphomonoesters hydrolase activity DNA nuclease activity cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding DNA binding organic cyclic compound binding nucleic acid binding endonuclease activity catalytic activity, acting on a nucleic acid endodeoxyribonuclease activity, producing 5'-phosphomonoesters hydrolase activity DNA nuclease activity type II site-specific deoxyribonuclease activity restriction endodeoxyribonuclease activity DNA endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on DNA endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters catalytic activity	biological process involved in interspecies interaction between organisms response to stimulus DNA restriction-modification system clearance of foreign intracellular nucleic acids response to biotic stimulus nucleobase-containing compound metabolic process DNA modification organic substance metabolic process response to stress response to external biotic stimulus response to other organism defense response defense response to symbiont response to external stimulus biological process involved in interspecies interaction between organisms response to stimulus DNA restriction-modification system clearance of foreign intracellular nucleic acids response to biotic stimulus nucleobase-containing compound metabolic process DNA modification organic substance metabolic process response to stress response to external biotic stimulus response to other organism defense response defense response to symbiont response to external stimulus primary metabolic process clearance of foreign intracellular DNA DNA metabolic process nucleic acid metabolic process organic cyclic compound metabolic process defense response to other organism macromolecule modification metabolic process macromolecule metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR041963	BsuBI/PstI restriction endonuclease, C-terminal domain superfamily	Homologous Superfamily
A, B	IPR009528	BsuBI/PstI restriction endonuclease domain	Domain
A, B	IPR041454	BsuBI/PstI restriction endonuclease, HTH domain	Domain
A, B	IPR041962	BsuBI/PstI restriction endonuclease, N-terminal domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.