Annotations: 1FR2

CRYSTAL STRUCTURE OF THE E9 DNASE DOMAIN WITH A MUTANT IMMUNITY PROTEIN IM9(E41A)

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
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1fr2b_	Alpha and beta proteins (a+b)	His-Me finger endonucleases	His-Me finger endonucleases	HNH-motif	DNase domain of colicin E9	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1fr2a_	All alpha proteins	Acyl carrier protein-like	Colicin E immunity proteins	Colicin E immunity proteins	ImmE9 protein (Im9)	(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)
B	SCOP2B Superfamily	His-Me finger endonucleases	8042111	3001893	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Colicin E immunity proteins	8037581	3001814	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)
B	zf-His_Me_endon	e1fr2B1	A: alpha arrays	X: EGF-like	H: EGF-related	T: EGF/Laminin	F: zf-His_Me_endon	ECOD (v295.2)
A	Gag_p24_C	e1fr2A1	A: alpha arrays	X: Urease, gamma-subunit	H: p53 tetramerization domain	T: p53 tetramerization domain	F: Gag_p24_C	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.90.540.10	Alpha Beta	Alpha-Beta Complex	Colicin E7 immunity protein	Chain B, fragment: Endonuclease domain	CATH (4.3.0)
A	1.10.1200.20	Mainly Alpha	Orthogonal Bundle	Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein	Chain A	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	COLICIN E9	protein binding binding protein domain specific binding endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid catalytic activity	-	intracellular anatomical structure cellular anatomical structure extrachromosomal circular DNA extrachromosomal DNA protein-containing complex
A	COLICIN E9 IMMUNITY PROTEIN	protein binding binding protein domain specific binding toxic substance binding	metabolic process cellular process bacteriocin immunity toxin metabolic process secondary metabolic process	protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR024575	Cloacin/colicin	Family
B	IPR024566	Colicin, receptor domain	Domain
B	IPR016128	Pyosin/cloacin translocation domain	Domain
B	IPR036302	Pyosin/cloacin translocation domain superfamily	Homologous Superfamily
B	IPR037146	Colicin/pyocin, DNase domain superfamily	Homologous Superfamily
B	IPR044925	His-Me finger superfamily	Homologous Superfamily
A	IPR000290	Colicin immunity protein/pyocin immunity protein	Family
A	IPR035900	Colicin E immunity protein superfamily	Homologous Superfamily

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
B	colicin-E9 M-CSA #791	Colicin E9 from Escherichia coli is a non-specific endonuclease. This extracellular toxin is secreted by strains of Escherichia coli to kill competing bacteria. It kills the cell by enzymatic cleavage of nucleic acids once it has entered the cell. Since colicin E9 is non-specific, it can hydrolyse both single and double stranded DNA.	Defined by 7 residues: ARG:B-5ARG:B-96GLU:B-100HIS:B-102HIS:B-103HIS:B-127HIS:B-131 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.1.21.1 (PDB Primary Data) Search M-CSA Motif + EC 3.1.21.1 EC: 3.1 (UniProt) Search M-CSA Motif + EC 3.1