Annotations: 6SDR

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d6sdrb_	Alpha and beta proteins (a+b)	Ferredoxin-like	4Fe-4S ferredoxins	Ferredoxin domains from multidomain proteins	automated matches	(Nitratidesulfovibrio vulgaris str. Hildenborough ) [TaxId: 882 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Formate dehydrogenase/DMSO reductase, domains 1-3	8099885	4000801	SCOP2 (2022-06-29)
A	SCOP2 Family	Formate dehydrogenase/DMSO reductase, C-terminal domain	8101089	4002360	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Formate dehydrogenase/DMSO reductase, domains 1-3	8099886	3001453	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	ADC-like	8101090	3001132	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	4Fe-4S ferredoxins	8094124	3000020	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	Molydop_binding	e6sdrA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: double psi	F: Molydop_binding	ECOD (1.6)
A	Molybdop_Fe4S4	e6sdrA2	A: a+b two layers	X: Formate dehydrogenase/DMSO reductase, domain 1 (From Topology)	H: Formate dehydrogenase/DMSO reductase, domain 1 (From Topology)	T: Formate dehydrogenase/DMSO reductase, domain 1	F: Molybdop_Fe4S4	ECOD (1.6)
A	Molybdopterin_2nd	e6sdrA4	A: a/b three-layered sandwiches	X: Rossmann-like	H: Formate dehydrogenase/DMSO reductase, domains 2 and 3 (From Topology)	T: Formate dehydrogenase/DMSO reductase, domains 2 and 3	F: Molybdopterin_2nd	ECOD (1.6)
A	Molybdopterin_1st_1	e6sdrA3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Formate dehydrogenase/DMSO reductase, domains 2 and 3 (From Topology)	T: Formate dehydrogenase/DMSO reductase, domains 2 and 3	F: Molybdopterin_1st_1	ECOD (1.6)
B	Fer4_11	e6sdrB2	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_11	ECOD (1.6)
B	Fer4_11_1	e6sdrB1	A: a+b two layers	X: 4Fe-4S ferredoxin (From Topology)	H: 4Fe-4S ferredoxin (From Topology)	T: 4Fe-4S ferredoxin	F: Fer4_11_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.740	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (utative)
A	3.40.228.10	Alpha Beta	3-Layer(aba) Sandwich	Dimethylsulfoxide Reductase	domain 2	CATH (utative)
A	2.40.40.20	Mainly Beta	Beta Barrel	Barwin-like endoglucanases		CATH (utative)
B	3.30.70.20	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01568	Molydopterin dinucleotide binding domain (Molydop_binding)	Molydopterin dinucleotide binding domain	This domain is found in various molybdopterin - containing oxidoreductases and tungsten formylmethanofuran dehydrogenase subunit d (FwdD) and molybdenum formylmethanofuran dehydrogenase subunit (FmdD); where the domain constitutes almost the entir ...	This domain is found in various molybdopterin - containing oxidoreductases and tungsten formylmethanofuran dehydrogenase subunit d (FwdD) and molybdenum formylmethanofuran dehydrogenase subunit (FmdD); where the domain constitutes almost the entire subunit. The formylmethanofuran dehydrogenase catalyses the first step in methane formation from CO2 in methanogenic archaea and has a molybdopterin dinucleotide cofactor [1]. This domain corresponds to the C-terminal domain IV in dimethyl sulfoxide (DMSO)reductase which interacts with the 2-amino pyrimidone ring of both molybdopterin guanine dinucleotide molecules [2].	Domain
A	PF04879	Molybdopterin oxidoreductase Fe4S4 domain (Molybdop_Fe4S4)	Molybdopterin oxidoreductase Fe4S4 domain	This domain is found in formate dehydrogenase H for which the structure is known. This first domain (residues 1 to 60) of PDB:1aa6 is an Fe4S4 cluster just below the protein surface [1].	Domain
A	PF00384	Molybdopterin oxidoreductase (Molybdopterin)	Molybdopterin oxidoreductase	-	Family
B	PF13247	4Fe-4S dicluster domain (Fer4_11)	4Fe-4S dicluster domain	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich. Domain contai ...	Superfamily includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. Structure of the domain is an alpha-antiparallel beta sandwich. Domain contains two 4Fe4S clusters.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Formate dehydrogenase, alpha subunit, selenocysteine-containing	cation binding transition metal ion binding molybdenum ion binding ion binding binding metal ion binding small molecule binding organic cyclic compound binding molybdopterin cofactor binding oxidoreductase activity, acting on the aldehyde or oxo group of donors, cytochrome as acceptor formate dehydrogenase (cytochrome-c-553) activity oxidoreductase activity oxidoreductase activity, acting on the aldehyde or oxo group of donors catalytic activity cation binding transition metal ion binding molybdenum ion binding ion binding binding metal ion binding small molecule binding organic cyclic compound binding molybdopterin cofactor binding oxidoreductase activity, acting on the aldehyde or oxo group of donors, cytochrome as acceptor formate dehydrogenase (cytochrome-c-553) activity oxidoreductase activity oxidoreductase activity, acting on the aldehyde or oxo group of donors catalytic activity iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding formate dehydrogenase (NAD+) activity oxidoreductase activity, acting on the aldehyde or oxo group of donors, NAD or NADP as acceptor electron transfer activity	cellular respiration energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process generation of precursor metabolites and energy anaerobic respiration	periplasmic space cellular anatomical entity
B	Formate dehydrogenase, beta subunit, putative	iron-sulfur cluster binding binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding cation binding ion binding metal ion binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006963	Molybdopterin oxidoreductase, 4Fe-4S domain	Domain
A	IPR006657	Molybdopterin dinucleotide-binding domain	Domain
A	IPR006656	Molybdopterin oxidoreductase	Domain
A	IPR006443	Formate dehydrogenase-N, alpha subunit	Family
A	IPR006311	Twin-arginine translocation pathway, signal sequence	Conserved Site
A	IPR009010	Aspartate decarboxylase-like domain superfamily	Homologous Superfamily
A	IPR006655	Molybdopterin oxidoreductase, prokaryotic, conserved site	Conserved Site
A	IPR027467	Molybdopterin oxidoreductase, molybdopterin cofactor binding site	Binding Site
A	IPR019546	Twin-arginine translocation pathway, signal sequence, bacterial/archaeal	Conserved Site
B	IPR051555	Formate Dehydrogenase Electron Transfer Unit	Family
B	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	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 R01GM133198.