Annotations: 3FC3

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	EUF07577	e3fc3A1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: EUF07577	ECOD (1.6)
A	Endonuclease_7	e3fc3A3	A: few secondary structure elements	X: His-Me finger endonucleases (From Homology)	H: His-Me finger endonucleases	T: His-Me finger endonucleases	F: Endonuclease_7	ECOD (1.6)
A	EUF08679	e3fc3A2	A: few secondary structure elements	X: His-Me finger endonucleases (From Homology)	H: His-Me finger endonucleases	T: His-Me finger endonucleases	F: EUF08679	ECOD (1.6)
B	EUF07577	e3fc3B1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: EUF07577	ECOD (1.6)
B	Endonuclease_7	e3fc3B3	A: few secondary structure elements	X: His-Me finger endonucleases (From Homology)	H: His-Me finger endonucleases	T: His-Me finger endonucleases	F: Endonuclease_7	ECOD (1.6)
B	EUF08679	e3fc3B2	A: few secondary structure elements	X: His-Me finger endonucleases (From Homology)	H: His-Me finger endonucleases	T: His-Me finger endonucleases	F: EUF08679	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
A	3.30.60.130	Alpha Beta	2-Layer Sandwich	Wheat Germ Agglutinin (Isolectin 2)	domain 1	CATH (4.3.0)
A	3.40.1800.10	Alpha Beta	3-Layer(aba) Sandwich	His-Me finger endonuclease fold	His-Me finger endonucleases	CATH (4.3.0)
B	2.30.30.140	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
B	3.30.60.130	Alpha Beta	2-Layer Sandwich	Wheat Germ Agglutinin (Isolectin 2)	domain 1	CATH (4.3.0)
B	3.40.1800.10	Alpha Beta	3-Layer(aba) Sandwich	His-Me finger endonuclease fold	His-Me finger endonucleases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF18350	Restriction endonuclease SH3 domain (SH3_17)	Restriction endonuclease SH3 domain	This is an N-terminal beta-barrel domain found in the Hpy99I protomer region. Hpy99I is a type II restriction endonuclease (REase) found in the gastric pathogen Helicobacter pylori. The beta-barrel domain has the SH3-domain fold. Deletion of the beta ...	This is an N-terminal beta-barrel domain found in the Hpy99I protomer region. Hpy99I is a type II restriction endonuclease (REase) found in the gastric pathogen Helicobacter pylori. The beta-barrel domain has the SH3-domain fold. Deletion of the beta-barrel domain drastically reduced the activity of Hpy99I [1].	Domain
A, B	PF02945	Recombination endonuclease VII (Endonuclease_7)	Recombination endonuclease VII	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Restriction endonuclease Hpy99I	cation binding ion binding binding metal ion binding small molecule binding	-	-
C	5'-(DCPDTPDCPDGPDAPDCPDGPDTPDAPDGP*DA)-3'	-	-	-
D	5'-(DTPDAPDCPDGPDTPDCPDGPDAPDGPDTP*DC)-3'	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR004211	Recombination endonuclease VII	Family
A, B	IPR038563	Recombination endonuclease VII superfamily	Homologous Superfamily
A, B	IPR041475	His-Me finger endonuclease, beta4-alpha2 domain	Domain
A, B	IPR044925	His-Me finger superfamily	Homologous Superfamily
A, B	IPR040625	Restriction endonuclease, SH3 domain	Domain

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.