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 3MVF | pdb_00003mvf

Crystal Structure of Nitrophorin 4 from Rhodnius prolixus Complexed with Nitrite at pH 7.4

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad3mvfa_ All beta proteins Lipocalins Lipocalins Retinol binding protein-like Nitrophorin 4 Triatomid bug (Rhodnius prolixus ) [TaxId: 13249 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyLipocalins 8043776 3001332 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ASod_Cue3mvfA1 A: alpha arraysX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Cu,Zn superoxide dismutase-likeF: Sod_CuECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.40.128.20 Mainly Beta Beta Barrel Lipocalin Calycin beta-barrel core domainCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF02087Nitrophorin (Nitrophorin)NitrophorinDomain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Nitrophorin-4 -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR012674Calycin superfamilyHomologous Superfamily
IPR002351Nitrophorin domainDomain
IPR023613NitrophorinFamily

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

ChainsEnzyme NameDescriptionCatalytic Residues
nitrite dismutase  M-CSA #979

This enzyme is one of the nitrophorins originating from the blood feeding insect Rhodnius prolixus. Heme protein nitrophorins can catalyse the conversion of nitrite to nitric oxide (NO) with concomitant nitrate production at neutral pH. NO induces vasodilation and reduces platelet aggregation, increasing the insect's blood supply.

Defined by 3 residues: ASP:A-30HIS:A-59LEU:A-130
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Explore in 3D: M-CSA Motif Definition
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EC: 1.7.6.1 (UniProt)