2BII | pdb_00002bii

crystal structure of nitrate-reducing fragment of assimilatory nitrate reductase from Pichia angusta

External Resource: Annotation


Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
BMo-co_dimere2biiB4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: Mo-co_dimerECOD (1.6)
BOxidored_molybe2biiB3 A: a+b two layersX: beta-GraspH: Ubiquitin-relatedT: Sulfite oxidase, middle catalytic domainF: Oxidored_molybECOD (1.6)
AMo-co_dimere2biiA4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: Mo-co_dimerECOD (1.6)
AOxidored_molybe2biiA3 A: a+b two layersX: beta-GraspH: Ubiquitin-relatedT: Sulfite oxidase, middle catalytic domainF: Oxidored_molybECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B3.90.420.10 Alpha Beta Alpha-Beta Complex Sulfite Oxidase Chain A, domain 2CATH (4.3.0)
B2.60.40.650 Mainly Beta Sandwich Immunoglobulin-like CATH (4.3.0)
A3.90.420.10 Alpha Beta Alpha-Beta Complex Sulfite Oxidase Chain A, domain 2CATH (4.3.0)
A2.60.40.650 Mainly Beta Sandwich Immunoglobulin-like CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
NITRATE REDUCTASE [NADPH] -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A, B
IPR001709Flavoprotein pyridine nucleotide cytochrome reductaseDomain
A, B
IPR001433Oxidoreductase FAD/NAD(P)-bindingDomain
A, B
IPR005066Moybdenum cofactor oxidoreductase, dimerisationDomain
A, B
IPR008335Eukaryotic molybdopterin oxidoreductaseFamily
A, B
IPR012137Nitrate reductase NADH dependentFamily
A, B
IPR017938Riboflavin synthase-like beta-barrelHomologous Superfamily
A, B
IPR014756Immunoglobulin E-setHomologous Superfamily
A, B
IPR036400Cytochrome b5-like heme/steroid binding domain superfamilyHomologous Superfamily
A, B
IPR018506Cytochrome b5, heme-binding siteBinding Site
A, B
IPR022407Oxidoreductase, molybdopterin binding siteBinding Site
A, B
IPR036374Oxidoreductase, molybdopterin-binding domain superfamilyHomologous Superfamily
A, B
IPR039261Ferredoxin-NADP reductase (FNR), nucleotide-binding domainHomologous Superfamily
A, B
IPR008333Flavoprotein pyridine nucleotide cytochrome reductase-like, FAD-binding domainDomain
A, B
IPR000572Oxidoreductase, molybdopterin-binding domainDomain
A, B
IPR017927FAD-binding domain, ferredoxin reductase-typeDomain
A, B
IPR001199Cytochrome b5-like heme/steroid binding domainDomain

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

ChainsEnzyme NameDescriptionCatalytic Residues
Nitrate reductase [NADH]  M-CSA #925

This entry represents the NADH dependent nitrate reductase (NR) from plants and fungi, including NIA1 and NIA2 from Arabidopsis. They contain an N-terminal oxidoreductase molybdopterin binding domain and a C-terminal FAD-binding domain. The N-terminal domain is responsible for the reduction of nitrate; the C-terminal domain is responsible for the regeneration of the FAD cofactor. Only the N-terminal domain function is shown here; the C-terminal function can be found in MACiE:862.

Defined by 3 residues: CYS:B-79 [auth B-139]ASP:B-211 [auth B-271]ASN:B-212 [auth B-272]
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Explore in 3D: M-CSA Motif Definition
Search M-CSA Motif
EC: 1.7.1.2 (PDB Primary Data)
EC: 1.7.1.3 (UniProt)