1QC9 | pdb_00001qc9

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
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
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)
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)
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)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	Restriction endonuclease-like	8044421	3000104	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Restriction endonuclease-like	8044421	3000104	SCOP2B (2022-06-29)
A	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)
C		e1qc9C1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: Hexokinase_2	F:	ECOD (20:10:01)
B		e1qc9B1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: Hexokinase_2	F:	ECOD (20:10:01)
A		e1qc9A1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: Hexokinase_2	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

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

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 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 cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding DNA 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, 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 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.