1CNE

STRUCTURAL STUDIES ON CORN NITRATE REDUCTASE: REFINED STRUCTURE OF THE CYTOCHROME B REDUCTASE FRAGMENT AT 2.5 ANGSTROMS, ITS ADP COMPLEX AND AN ACTIVE SITE MUTANT AND MODELING OF THE CYTOCHROME B DOMAIN

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1cnea1	All beta proteins	Reductase/isomerase/elongation factor common domain	Riboflavin synthase domain-like	Ferredoxin reductase FAD-binding domain-like	Nitrate reductase core domain	(Zea mays ) [TaxId: 4577 ],	SCOPe (2.08)
A	d1cnea2	Alpha and beta proteins (a/b)	Ferredoxin reductase-like, C-terminal NADP-linked domain	Ferredoxin reductase-like, C-terminal NADP-linked domain	Reductases	Nitrate reductase	(Zea mays ) [TaxId: 4577 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Riboflavin synthase domain-like	8042054	3001812	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Ferredoxin reductase-like, C-terminal NADP-linked domain	8044192	3001461	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	FAD_binding_6	e1cneA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: FAD_binding_6	ECOD (1.6)
A	NAD_binding_1	e1cneA2	A: a/b three-layered sandwiches	X: Ferredoxin reductase-like, C-terminal NADP-linked domain (From Topology)	H: Ferredoxin reductase-like, C-terminal NADP-linked domain (From Topology)	T: Ferredoxin reductase-like, C-terminal NADP-linked domain	F: NAD_binding_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.30.10	Mainly Beta	Beta Barrel	Elongation Factor Tu (Ef-tu)	domain 3	CATH (4.3.0)
A	3.40.50.80	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00175	Oxidoreductase NAD-binding domain (NAD_binding_1)	Oxidoreductase NAD-binding domain	Xanthine dehydrogenases, that also bind FAD/NAD, have essentially no similarity.	Domain
A	PF00970	Oxidoreductase FAD-binding domain (FAD_binding_6)	Oxidoreductase FAD-binding domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	NITRATE REDUCTASE	oxidoreductase activity, acting on other nitrogenous compounds as donors, with NAD or NADP as acceptor nitrate reductase activity oxidoreductase activity oxidoreductase activity, acting on other nitrogenous compounds as donors nitrate reductase [NAD(P)H] activity nitrate reductase (NADH) activity catalytic activity FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding oxidoreductase activity, acting on other nitrogenous compounds as donors, with NAD or NADP as acceptor nitrate reductase activity oxidoreductase activity oxidoreductase activity, acting on other nitrogenous compounds as donors nitrate reductase [NAD(P)H] activity nitrate reductase (NADH) activity catalytic activity FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding nucleotide binding heterocyclic compound binding small molecule binding tetrapyrrole binding heme binding cation binding transition metal ion binding molybdenum ion binding metal ion binding	nitrate assimilation nitrogen cycle metabolic process oxoacid metabolic process cellular metabolic process metabolic process small molecule metabolic process cellular process organic acid metabolic process nitrate metabolic process reactive nitrogen species metabolic process nitric oxide metabolic process nitric oxide biosynthetic process biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036400	Cytochrome b5-like heme/steroid binding domain superfamily	Homologous Superfamily
A	IPR001709	Flavoprotein pyridine nucleotide cytochrome reductase	Domain
A	IPR018506	Cytochrome b5, heme-binding site	Binding Site
A	IPR001433	Oxidoreductase FAD/NAD(P)-binding	Domain
A	IPR005066	Moybdenum cofactor oxidoreductase, dimerisation	Domain
A	IPR008335	Eukaryotic molybdopterin oxidoreductase	Family
A	IPR036374	Oxidoreductase, molybdopterin-binding domain superfamily	Homologous Superfamily
A	IPR001834	NADH:cytochrome b5 reductase-like	Family
A	IPR039261	Ferredoxin-NADP reductase (FNR), nucleotide-binding domain	Homologous Superfamily
A	IPR008333	Flavoprotein pyridine nucleotide cytochrome reductase-like, FAD-binding domain	Domain
A	IPR017938	Riboflavin synthase-like beta-barrel	Homologous Superfamily
A	IPR000572	Oxidoreductase, molybdopterin-binding domain	Domain
A	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A	IPR017927	FAD-binding domain, ferredoxin reductase-type	Domain
A	IPR001199	Cytochrome b5-like heme/steroid 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 R01GM157729.