6TTL

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	F_UNCLASSIFIED	e6ttlA3	A: alpha bundles	X: Bromodomain-like	H: Nqo1C-terminal domain-like (From Topology)	T: Nqo1C-terminal domain-like	F: F_UNCLASSIFIED	ECOD (1.6)
A	PF02906	e6ttlA1	A: a/b three-layered sandwiches	X: Fe-only hydrogenase (From Topology)	H: Fe-only hydrogenase (From Topology)	T: Fe-only hydrogenase	F: PF02906	ECOD (1.6)
A	PF02256	e6ttlA2	A: extended segments	X: Fe-only hydrogenase smaller subunit (From Topology)	H: Fe-only hydrogenase smaller subunit (From Topology)	T: Fe-only hydrogenase smaller subunit	F: PF02256	ECOD (1.6)
B	F_UNCLASSIFIED	e6ttlB3	A: alpha bundles	X: Bromodomain-like	H: Nqo1C-terminal domain-like (From Topology)	T: Nqo1C-terminal domain-like	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF02906	e6ttlB1	A: a/b three-layered sandwiches	X: Fe-only hydrogenase (From Topology)	H: Fe-only hydrogenase (From Topology)	T: Fe-only hydrogenase	F: PF02906	ECOD (1.6)
B	PF02256	e6ttlB2	A: extended segments	X: Fe-only hydrogenase smaller subunit (From Topology)	H: Fe-only hydrogenase smaller subunit (From Topology)	T: Fe-only hydrogenase smaller subunit	F: PF02256	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A, B	PF02906	Iron only hydrogenase large subunit, C-terminal domain (Fe_hyd_lg_C)	Iron only hydrogenase large subunit, C-terminal domain	-	Domain
A, B	PF02256	Iron hydrogenase small subunit (Fe_hyd_SSU)	Iron hydrogenase small subunit	This family represents the small subunit of the Fe-only hydrogenases EC:1.18.99.1. The subunit is comprised of alternating random coil and alpha helical structures that encompasses the large subunit in a novel protein fold [1].	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	[FeFe]-hydrogenase	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 iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding cation binding transition metal ion binding iron ion binding ion 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 iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding	-	-

Chains	Accession	Name	Type
A, B	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
A, B	IPR004108	Iron hydrogenase, large subunit, C-terminal	Domain
A, B	IPR036991	Iron hydrogenase, small subunit superfamily	Homologous Superfamily
A, B	IPR019554	Soluble ligand binding domain	Domain
A, B	IPR009016	Iron hydrogenase	Homologous Superfamily
A, B	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
A, B	IPR013352	Iron hydrogenase, subset	Domain
A, B	IPR003149	Iron hydrogenase, small subunit	Domain