1AA6

REDUCED FORM OF FORMATE DEHYDROGENASE H FROM E. COLI

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
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1aa6a1	All beta proteins	Double psi beta-barrel	ADC-like	Formate dehydrogenase/DMSO reductase, C-terminal domain	Formate dehydrogenase H	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1aa6a2	Alpha and beta proteins (a/b)	Formate dehydrogenase/DMSO reductase, domains 1-3	Formate dehydrogenase/DMSO reductase, domains 1-3	Formate dehydrogenase/DMSO reductase, domains 1-3	Formate dehydrogenase H	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Formate dehydrogenase/DMSO reductase, domains 1-3	8042870	3001453	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	ADC-like	8042869	3001132	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	e1aa6A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: double psi	F: Molydop_binding	ECOD (1.6)
A	Molybdop_Fe4S4	e1aa6A3	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	e1aa6A2	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	e1aa6A4	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)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.20.25.90	Mainly Beta	Single Sheet	N-terminal domain of TfIIb	ADC-like domains	CATH (4.3.0)
A	3.40.50.740	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
A	3.40.228.10	Alpha Beta	3-Layer(aba) Sandwich	Dimethylsulfoxide Reductase	domain 2	CATH (4.3.0)
A	2.40.40.20	Mainly Beta	Beta Barrel	Barwin-like endoglucanases		CATH (4.3.0)

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 entire s ...	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		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	FORMATE DEHYDROGENASE H	oxidoreductase activity oxidoreductase activity, acting on the aldehyde or oxo group of donors catalytic activity binding molybdopterin cofactor binding iron-sulfur cluster binding 4 iron, 4 sulfur cluster binding metal cluster binding small molecule binding formate dehydrogenase (NAD+) activity oxidoreductase activity, acting on the aldehyde or oxo group of donors, NAD or NADP as acceptor cation binding ion binding metal ion binding	anaerobic electron transport chain cellular respiration energy derivation by oxidation of organic compounds respiratory electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy anaerobic respiration monosaccharide metabolic process carbohydrate metabolic process catabolic process hexose catabolic process carbohydrate catabolic process anaerobic electron transport chain cellular respiration energy derivation by oxidation of organic compounds respiratory electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy anaerobic respiration monosaccharide metabolic process carbohydrate metabolic process catabolic process hexose catabolic process carbohydrate catabolic process hexose metabolic process primary metabolic process glucose catabolic process small molecule metabolic process monosaccharide catabolic process small molecule catabolic process glucose metabolic process urate catabolic process purine-containing compound catabolic process purine-containing compound metabolic process urate metabolic process oxoacid metabolic process formate oxidation carboxylic acid metabolic process monocarboxylic acid metabolic process organic acid metabolic process formate metabolic process	cellular anatomical structure membrane intracellular anatomical structure cytoplasm cytosol protein-containing complex catalytic complex formate dehydrogenase complex oxidoreductase complex

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	IPR009010	Aspartate decarboxylase-like domain superfamily	Homologous Superfamily
A	IPR006655	Molybdopterin oxidoreductase, prokaryotic, conserved site	Conserved Site
A	IPR041924	Formate dehydrogenase H, N-terminal	Domain
A	IPR050123	Prokaryotic molybdopterin-containing oxidoreductase	Family
A	IPR027467	Molybdopterin oxidoreductase, molybdopterin cofactor binding site	Binding Site
A	IPR041925	Formate dehydrogenase H, molybdopterin-binding domain	Domain
A	IPR006478	Formate dehydrogenase, alpha subunit	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	formate dehydrogenase M-CSA #562	Formate Dehydrogenase H (FDH-H) from Escherichi coli is a 79kDa polypeptide component of the anaerobic formate hydrogen lyase complex. The enzyme catalyses the oxidation of formate (produced from pyruvate during anaerobic growth) to carbon dioxide, in the absence of exogenous electron acceptors, with the concomitant release of two electrons and two protons.	Defined by 4 residues: LYS:A-44SEC:A-140HIS:A-141ARG:A-333 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 1.2.1.2 (PDB Primary Data) Search M-CSA Motif + EC 1.2.1.2 EC: 1.17.98.4 (UniProt) Search M-CSA Motif + EC 1.17.98.4

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.