Annotations: 1FEH

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1feha1	Alpha and beta proteins (a/b)	Fe-only hydrogenase	Fe-only hydrogenase	Fe-only hydrogenase	Fe-only hydrogenase, catalytic domain	(Clostridium pasteurianum ) [TaxId: 1501 ],	SCOPe (2.08)
A	d1feha2	Alpha and beta proteins (a+b)	beta-Grasp (ubiquitin-like)	2Fe-2S ferredoxin-like	2Fe-2S ferredoxin domains from multidomain proteins	Fe-only hydrogenase, N-terminal domain	(Clostridium pasteurianum ) [TaxId: 1501 ],	SCOPe (2.08)
A	d1feha3	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	Ferredoxin domains from multidomain proteins	Fe-only hydrogenase, second domain	(Clostridium pasteurianum ) [TaxId: 1501 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	2Fe-2S ferredoxin-like	8039789	3000113	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Fe-only hydrogenase smaller subunit	8101149	3001779	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	4Fe-4S ferredoxins	8039792	3000020	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Fe-only hydrogenase	8039787	3001826	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		e1fehA1	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: Propep_M14	F:	ECOD (20:10:01)
A		e1fehA3	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: DUF3197	F:	ECOD (20:10:01)
A		e1fehA5	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: E1_dh	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.10.20.740	Alpha Beta	Roll	Ubiquitin-like (UB roll)		CATH (4.3.0)
A	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROTEIN (PERIPLASMIC HYDROGENASE 1)	oxidoreductase activity oxidoreductase activity, acting on hydrogen as donor, iron-sulfur protein as acceptor oxidoreductase activity, acting on hydrogen as donor ferredoxin hydrogenase activity catalytic activity cation binding transition metal ion binding iron ion binding ion binding binding metal ion binding small molecule binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding oxidoreductase activity oxidoreductase activity, acting on hydrogen as donor, iron-sulfur protein as acceptor oxidoreductase activity, acting on hydrogen as donor ferredoxin hydrogenase activity catalytic activity cation binding transition metal ion binding iron ion binding ion binding binding metal ion binding small molecule binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036010	2Fe-2S ferredoxin-like superfamily	Homologous Superfamily
A	IPR001041	2Fe-2S ferredoxin-type iron-sulfur binding domain	Domain
A	IPR009016	Iron hydrogenase	Homologous Superfamily
A	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
A	IPR004108	Iron hydrogenase, large subunit, C-terminal	Domain
A	IPR055150	Iron hydrogenase 1-like, iron-sulfur centre-binding domain	Domain
A	IPR036991	Iron hydrogenase, small subunit superfamily	Homologous Superfamily
A	IPR050340	Cytosolic Fe-S Cluster Assembly Factor	Family
A	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
A	IPR013352	Iron hydrogenase, subset	Domain
A	IPR003149	Iron hydrogenase, small subunit	Domain
A	IPR019574	NADH:ubiquinone oxidoreductase, subunit G, iron-sulphur binding	Domain

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.