Annotations: 4PXG

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	SBP_bac_5	e4pxgB1	A: a/b three-layered sandwiches	X: Alpha-beta plaits	H: Protease propeptides/inhibitors	T: Protease propeptides/inhibitors	F: SBP_bac_5	ECOD (v294.1)
A	PF26540	e4pxgA1	A: a/b three-layered sandwiches	X: Alpha-beta plaits	H: Protease propeptides/inhibitors	T: Protease propeptides/inhibitors	F: PF26540	ECOD (v294.1)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Type-2 restriction enzyme Sau3AI	DNA binding binding nucleic acid binding endonuclease activity catalytic activity, acting on a nucleic acid hydrolase activity DNA nuclease activity type II site-specific deoxyribonuclease activity restriction endodeoxyribonuclease activity DNA endonuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on DNA nuclease activity DNA endonuclease activity, producing 5'-phosphomonoesters DNA binding binding nucleic acid binding endonuclease activity catalytic activity, acting on a nucleic acid hydrolase activity DNA nuclease activity type II site-specific deoxyribonuclease activity restriction endodeoxyribonuclease activity DNA endonuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on DNA nuclease activity DNA endonuclease activity, producing 5'-phosphomonoesters catalytic activity	biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response DNA restriction-modification system defense response to symbiont response to external stimulus primary metabolic process clearance of foreign intracellular DNA clearance of foreign intracellular nucleic acids DNA metabolic process response to biotic stimulus nucleic acid metabolic process nucleobase-containing compound metabolic process DNA modification biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response DNA restriction-modification system defense response to symbiont response to external stimulus primary metabolic process clearance of foreign intracellular DNA clearance of foreign intracellular nucleic acids DNA metabolic process response to biotic stimulus nucleic acid metabolic process nucleobase-containing compound metabolic process DNA modification defense response to other organism response to stress macromolecule modification metabolic process cellular process response to external biotic stimulus macromolecule metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR011337	DNA mismatch repair MutH/Type II restriction enzyme Sau3AI	Domain
A, B	IPR011335	Restriction endonuclease type II-like	Homologous Superfamily
A, B	IPR037057	DNA mismatch repair MutH/Type II restriction endonuclease 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.