Annotations: 6EHS

E. coli Hydrogenase-2 chemically reduced structure

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth L]	d6ehsl_	Multi-domain proteins (alpha and beta)	HydB/Nqo4-like	HydB/Nqo4-like	automated matches	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
D [auth M]	d6ehsm_	Multi-domain proteins (alpha and beta)	HydB/Nqo4-like	HydB/Nqo4-like	automated matches	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
A [auth S]	d6ehss_	Multi-domain proteins (alpha and beta)	HydA/Nqo6-like	HydA/Nqo6-like	automated matches	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
C [auth T]	d6ehst_	Multi-domain proteins (alpha and beta)	HydA/Nqo6-like	HydA/Nqo6-like	automated matches	automated matches	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth L]	SCOP2B Superfamily	HydB/Nqo4-like	8098404	3001849	SCOP2B (2022-06-29)
D [auth M]	SCOP2 Family	Nickel-iron hydrogenase, large subunit	8098403	4002888	SCOP2 (2022-06-29)
D [auth M]	SCOP2 Superfamily	HydB/Nqo4-like	8098404	3001849	SCOP2 (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 [auth L]	tRNA_U5-meth_tr	e6ehsL1	A: beta barrels	X: Periplasmic binding protein-like II	H: Rubredoxin-related	T: Rubredoxin-related	F: tRNA_U5-meth_tr	ECOD (v294.2)
D [auth M]	tRNA_U5-meth_tr	e6ehsM1	A: beta barrels	X: Periplasmic binding protein-like II	H: Rubredoxin-related	T: Rubredoxin-related	F: tRNA_U5-meth_tr	ECOD (v294.2)
A [auth S]	tRNA_U5-meth_tr	e6ehsS1	A: beta barrels	X: Periplasmic binding protein-like II	H: Rubredoxin-related	T: Rubredoxin-related	F: tRNA_U5-meth_tr	ECOD (v294.2)
C [auth T]	tRNA_U5-meth_tr	e6ehsT1	A: beta barrels	X: Periplasmic binding protein-like II	H: Rubredoxin-related	T: Rubredoxin-related	F: tRNA_U5-meth_tr	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth L]	1.10.645.10	Mainly Alpha	Orthogonal Bundle	Cytochrome-c3 Hydrogenase	chain B	CATH (4.3.0)
D [auth M]	1.10.645.10	Mainly Alpha	Orthogonal Bundle	Cytochrome-c3 Hydrogenase	chain B	CATH (4.3.0)
A [auth S]	3.40.50.700	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NADH:ubiquinone oxidoreductase-like, 20kDa subunit	CATH (4.3.0)
A [auth S]	4.10.480.10	Few Secondary Structures	Irregular	Cytochrome-c3 Hydrogenase	Chain A, domain 2	CATH (4.3.0)
C [auth T]	3.40.50.700	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NADH:ubiquinone oxidoreductase-like, 20kDa subunit	CATH (4.3.0)
C [auth T]	4.10.480.10	Few Secondary Structures	Irregular	Cytochrome-c3 Hydrogenase	Chain A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth L], D [auth M]	PF00374	Nickel-dependent hydrogenase (NiFeSe_Hases)	Nickel-dependent hydrogenase	-	Family
A [auth S], C [auth T]	PF14720	NiFe/NiFeSe hydrogenase small subunit C-terminal (NiFe_hyd_SSU_C)	NiFe/NiFeSe hydrogenase small subunit C-terminal	-	Family
A [auth S], C [auth T]	PF01058	NADH ubiquinone oxidoreductase, 20 Kd subunit (Oxidored_q6)	NADH ubiquinone oxidoreductase, 20 Kd subunit		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth L], D [auth M]	Hydrogenase-2 large chain	hydrogenase (acceptor) activity oxidoreductase activity oxidoreductase activity, acting on hydrogen as donor catalytic activity cation binding transition metal ion binding ion binding binding nickel cation binding metal ion binding small molecule binding oxidoreductase activity, acting on hydrogen as donor, iron-sulfur protein as acceptor ferredoxin hydrogenase activity	-	cell periphery cellular anatomical structure plasma membrane membrane
A [auth S], C [auth T]	Hydrogenase-2 small chain	iron-sulfur cluster binding binding metal cluster binding small molecule 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 3 iron, 4 sulfur cluster binding hydrogenase (acceptor) activity 4 iron, 4 sulfur cluster binding electron transfer activity cation binding iron-sulfur cluster binding binding metal cluster binding small molecule 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 3 iron, 4 sulfur cluster binding hydrogenase (acceptor) activity 4 iron, 4 sulfur cluster binding electron transfer activity cation binding ion binding metal ion binding	cellular respiration energy derivation by oxidation of organic compounds metabolic process cellular process generation of precursor metabolites and energy anaerobic respiration	cellular anatomical structure membrane protein-containing complex catalytic complex oxidoreductase complex ferredoxin hydrogenase complex intracellular protein-containing complex [Ni-Fe] hydrogenase complex cell periphery plasma membrane extracellular region periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth L], D [auth M]	IPR001501	Nickel-dependent hydrogenase, large subunit	Family
B [auth L], D [auth M]	IPR029014	[NiFe]-hydrogenase, large subunit	Homologous Superfamily
B [auth L], D [auth M]	IPR018194	Nickel-dependent hydrogenase, large subunit, nickel binding site	Binding Site
B [auth L], D [auth M]	IPR050867	[NiFe]/[NiFeSe] hydrogenase large subunit	Family
A [auth S], C [auth T]	IPR006311	Twin-arginine translocation pathway, signal sequence	Conserved Site
A [auth S], C [auth T]	IPR001821	[NiFe]-hydrogenase, small subunit	Family
A [auth S], C [auth T]	IPR027394	Cytochrome-c3 hydrogenase, C-terminal	Domain
A [auth S], C [auth T]	IPR006137	NADH:ubiquinone oxidoreductase-like, 20kDa subunit	Domain
A [auth S], C [auth T]	IPR037024	[NiFe]-hydrogenase, small subunit, N-terminal domain superfamily	Homologous Superfamily
A [auth S], C [auth T]	IPR019546	Twin-arginine translocation pathway, signal sequence, bacterial/archaeal	Conserved Site
A [auth S], C [auth T]	IPR037148	[NiFe]-hydrogenase, small subunit, C-terminal domain superfamily	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B [auth L], D [auth M]	CSO	Parent Component: CYS : AA0205 : L-cysteine sulfenic acid MOD:00210

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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.