Annotations: 3H8I

The first X-ray structure of a sulfide:quinone oxidoreductase: Insights into sulfide oxidation mechanism

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	MoeA_C	e3h8iB5	A: alpha arrays	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: MoeA_C	ECOD (v295.2)
B		e3h8iB2	A: alpha arrays	X: Carbon-nitrogen hydrolase-like	H: Carbon-nitrogen hydrolase	T: Carbon-nitrogen hydrolase	F:	ECOD (v295.2)
A	MoeA_C	e3h8iA5	A: alpha arrays	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: MoeA_C	ECOD (v295.2)
A	Herpes_glycop_H	e3h8iA2	A: alpha arrays	X: gH main domain	H: gH main domain	T: gH main domain	F: Herpes_glycop_H	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.50.50.60	Alpha Beta	3-Layer(bba) Sandwich	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	CATH (4.3.0)
A	3.50.50.60	Alpha Beta	3-Layer(bba) Sandwich	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	NADH oxidase	oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity sulfide:quinone oxidoreductase activity catalytic activity oxidoreductase activity, acting on a sulfur group of donors, quinone or similar compound as acceptor	-	cellular anatomical structure membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR052541	Sulfide-quinone oxidoreductase	Family
A, B	IPR023753	FAD/NAD(P)-binding domain	Domain
A, B	IPR036188	FAD/NAD(P)-binding domain superfamily	Homologous Superfamily

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

Chains	Enzyme Name	Description	Catalytic Residues
A	sulfide:quinone oxidoreductase M-CSA #320	Catalyses the oxidation of sulfides, such as hydrogen sulfide, with the help of a quinone to form sulfur globules. Consecutive reaction cycles lead to the accumulation of a polysulfide product on the active site Cys residues; these products are released when they exceed a critical length, typically as cyclooctasulfur. This is an important step in anoxygenic bacterial photosynthesis.	Defined by 6 residues: CYS:A-129CYS:A-178ASP:A-215CYS:A-350ASP:A-353LYS:A-386 Some residues are not modelled and lack atomic coordinates. Visualization is not available. Some residues are not modelled and lack atomic coordinates. Structure Motif searching is not available. EC: 1.6.99.3 (PDB Primary Data) EC: 1.8.5.4 (UniProt)