1QC9

THE CRYSTALLOGRAPHIC STRUCTURE OF RESTRICTION ENDONUCLEASE ECO RI AT 3.3 A IN THE ABSENSE OF DNA

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1qc9a_	Alpha and beta proteins (a/b)	Restriction endonuclease-like	Restriction endonuclease-like	Restriction endonuclease EcoRI	Restriction endonuclease EcoRI	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1qc9b_	Alpha and beta proteins (a/b)	Restriction endonuclease-like	Restriction endonuclease-like	Restriction endonuclease EcoRI	Restriction endonuclease EcoRI	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d1qc9c_	Alpha and beta proteins (a/b)	Restriction endonuclease-like	Restriction endonuclease-like	Restriction endonuclease EcoRI	Restriction endonuclease EcoRI	(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	Restriction endonuclease-like	8044421	3000104	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Restriction endonuclease-like	8044421	3000104	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Restriction endonuclease-like	8044421	3000104	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	EcoRI	e1qc9A1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: EcoRI	ECOD (1.6)
B	EcoRI	e1qc9B1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: EcoRI	ECOD (1.6)
C	EcoRI	e1qc9C1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: EcoRI	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.580.10	Alpha Beta	3-Layer(aba) Sandwich	ECO RI Endonuclease	Chain A	CATH (4.3.0)
B	3.40.580.10	Alpha Beta	3-Layer(aba) Sandwich	ECO RI Endonuclease	Chain A	CATH (4.3.0)
C	3.40.580.10	Alpha Beta	3-Layer(aba) Sandwich	ECO RI Endonuclease	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF02963	Restriction endonuclease EcoRI (EcoRI)	Restriction endonuclease EcoRI	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	PROTEIN (ECO RI 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 heterocycle metabolic process response to stress nitrogen compound metabolic process response to external biotic stimulus response to other organism defense response 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 heterocycle metabolic process response to stress nitrogen compound metabolic process response to external biotic stimulus response to other organism defense response cellular metabolic process defense response to symbiont response to external stimulus cellular nitrogen compound metabolic process 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 cellular process macromolecule metabolic process cellular aromatic compound metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR011336	Restriction endonuclease, type II, EcoRI/MunI	Homologous Superfamily
A, B, C	IPR011335	Restriction endonuclease type II-like	Homologous Superfamily
A, B, C	IPR004221	Restriction endonuclease, type II, EcoRI	Family
A, B, C	IPR018131	Restriction endonuclease, type II, EcoRI, Proteobacteria	Family

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.