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UniProtKB/Swiss-Prot entry P00387


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

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Entry information
Entry name NB5R3_HUMAN
Primary accession number P00387
Secondary accession numbers O75675 Q8TDL8 Q8WTS8 Q9UEN4 Q9UEN5 Q9UL55 Q9UL56
Integrated into Swiss-Prot on July 21, 1986
Sequence was last modified on January 23, 2007 (Sequence version 3)
Annotations were last modified on    November 4, 2008 (Entry version 128)
Name and origin of the protein
Protein name NADH-cytochrome b5 reductase 3
Synonyms Cytochrome b5 reductase
B5R
EC 1.6.2.2
Diaphorase-1
Contains NADH-cytochrome b5 reductase 3 membrane-bound form
NADH-cytochrome b5 reductase 3 soluble form
Gene name
Name: CYB5R3
Synonyms: DIA1
From
Homo sapiens (Human) [TaxID: 9606] 
Taxonomy Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.
Protein existence 1: Evidence at protein level;
References
[1]
NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND VARIANT PRO-66.
TISSUE=Placenta;
DOI=10.1016/0378-1119(89)90299-0; PubMed=2479590 [NCBI, ExPASy, EBI, Israel, Japan]
Tomatsu S., Kobayashi Y., Fukumaki Y., Yubisui T., Orii T., Sakaki Y.;
"The organization and the complete nucleotide sequence of the human NADH-cytochrome b5 reductase gene.";
Gene 80:353-361(1989).
[2]
NUCLEOTIDE SEQUENCE [MRNA].
TISSUE=Liver;
Voice M.W.;
Submitted (NOV-1996) to the EMBL/GenBank/DDBJ databases.
[3]
NUCLEOTIDE SEQUENCE [MRNA].
Yoon B., Chung H., Ko E., Lee D.;
Submitted (MAR-2001) to the EMBL/GenBank/DDBJ databases.
[4]
NUCLEOTIDE SEQUENCE [MRNA], VARIANT PRO-66, AND VARIANTS HM GLN-58; PRO-73 AND TYR-204.
TISSUE=Leukocyte;
Lan F.;
Submitted (AUG-1998) to the EMBL/GenBank/DDBJ databases.
[5]
NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
Kalnine N., Chen X., Rolfs A., Halleck A., Hines L., Eisenstein S., Koundinya M., Raphael J., Moreira D., Kelley T., LaBaer J., Lin Y., Phelan M., Farmer A.;
"Cloning of human full-length CDSs in BD Creator(TM) system donor vector.";
Submitted (AUG-2003) to the EMBL/GenBank/DDBJ databases.
[6]
NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
DOI=10.1186/gb-2004-5-10-r84; PubMed=15461802 [NCBI, ExPASy, EBI, Israel, Japan]
Collins J.E., Wright C.L., Edwards C.A., Davis M.P., Grinham J.A., Cole C.G., Goward M.E., Aguado B., Mallya M., Mokrab Y., Huckle E.J., Beare D.M., Dunham I.;
"A genome annotation-driven approach to cloning the human ORFeome.";
Genome Biol. 5:RESEARCH84.1-RESEARCH84.11(2004).
[7]
NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND VARIANT SER-117.
Rieder M.J., Livingston R.J., Daniels M.R., Chung M.-W., Miyamoto K.E., Nguyen C.P., Nguyen D.A., Poel C.L., Robertson P.D., Schackwitz W.S., Sherwood J.K., Witrak L.A., Nickerson D.A.;
"NIEHS-SNPs, environmental genome project, NIEHS ES15478, Department of Genome Sciences, Seattle, WA (URL: http://egp.gs.washington.edu).";
Submitted (JUL-2003) to the EMBL/GenBank/DDBJ databases.
[8]
NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
DOI=10.1038/990031; PubMed=10591208 [NCBI, ExPASy, EBI, Israel, Japan]
Dunham I., Hunt A.R., Collins J.E., Bruskiewich R., Beare D.M., Clamp M., Smink L.J., Ainscough R., Almeida J.P., Babbage A.K., Bagguley C., Bailey J., Barlow K.F., Bates K.N., Beasley O.P., Bird C.P., Blakey S.E., Bridgeman A.M., Buck D., Burgess J., Burrill W.D., Burton J., Carder C., Carter N.P., Chen Y., Clark G., Clegg S.M., Cobley V.E., Cole C.G., Collier R.E., Connor R., Conroy D., Corby N.R., Coville G.J., Cox A.V., Davis J., Dawson E., Dhami P.D., Dockree C., Dodsworth S.J., Durbin R.M., Ellington A.G., Evans K.L., Fey J.M., Fleming K., French L., Garner A.A., Gilbert J.G.R., Goward M.E., Grafham D.V., Griffiths M.N.D., Hall C., Hall R.E., Hall-Tamlyn G., Heathcott R.W., Ho S., Holmes S., Hunt S.E., Jones M.C., Kershaw J., Kimberley A.M., King A., Laird G.K., Langford C.F., Leversha M.A., Lloyd C., Lloyd D.M., Martyn I.D., Mashreghi-Mohammadi M., Matthews L.H., Mccann O.T., Mcclay J., Mclaren S., McMurray A.A., Milne S.A., Mortimore B.J., Odell C.N., Pavitt R., Pearce A.V., Pearson D., Phillimore B.J.C.T., Phillips S.H., Plumb R.W., Ramsay H., Ramsey Y., Rogers L., Ross M.T., Scott C.E., Sehra H.K., Skuce C.D., Smalley S., Smith M.L., Soderlund C., Spragon L., Steward C.A., Sulston J.E., Swann R.M., Vaudin M., Wall M., Wallis J.M., Whiteley M.N., Willey D.L., Williams L., Williams S.A., Williamson H., Wilmer T.E., Wilming L., Wright C.L., Hubbard T., Bentley D.R., Beck S., Rogers J., Shimizu N., Minoshima S., Kawasaki K., Sasaki T., Asakawa S., Kudoh J., Shintani A., Shibuya K., Yoshizaki Y., Aoki N., Mitsuyama S., Roe B.A., Chen F., Chu L., Crabtree J., Deschamps S., Do A., Do T., Dorman A., Fang F., Fu Y., Hu P., Hua A., Kenton S., Lai H., Lao H.I., Lewis J., Lewis S., Lin S.-P., Loh P., Malaj E., Nguyen T., Pan H., Phan S., Qi S., Qian Y., Ray L., Ren Q., Shaull S., Sloan D., Song L., Wang Q., Wang Y., Wang Z., White J., Willingham D., Wu H., Yao Z., Zhan M., Zhang G., Chissoe S., Murray J., Miller N., Minx P., Fulton R., Johnson D., Bemis G., Bentley D., Bradshaw H., Bourne S., Cordes M., Du Z., Fulton L., Goela D., Graves T., Hawkins J., Hinds K., Kemp K., Latreille P., Layman D., Ozersky P., Rohlfing T., Scheet P., Walker C., Wamsley A., Wohldmann P., Pepin K., Nelson J., Korf I., Bedell J.A., Hillier L.W., Mardis E., Waterston R., Wilson R., Emanuel B.S., Shaikh T., Kurahashi H., Saitta S., Budarf M.L., McDermid H.E., Johnson A., Wong A.C.C., Morrow B.E., Edelmann L., Kim U.J., Shizuya H., Simon M.I., Dumanski J.P., Peyrard M., Kedra D., Seroussi E., Fransson I., Tapia I., Bruder C.E., O'Brien K.P., Wilkinson P., Bodenteich A., Hartman K., Hu X., Khan A.S., Lane L., Tilahun Y., Wright H.;
"The DNA sequence of human chromosome 22.";
Nature 402:489-495(1999).
[9]
NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
TISSUE=Placenta;
DOI=10.1101/gr.2596504; PubMed=15489334 [NCBI, ExPASy, EBI, Israel, Japan]
The MGC Project Team;
"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).";
Genome Res. 14:2121-2127(2004).
[10]
NUCLEOTIDE SEQUENCE [MRNA] OF 8-301, AND VARIANT PRO-66.
TISSUE=Liver;
PubMed=3035541 [NCBI, ExPASy, EBI, Israel, Japan]
Yubisui T., Naitoh Y., Zenno S., Tamura M., Takeshita M., Sakaki Y.;
"Molecular cloning of cDNAs of human liver and placenta NADH-cytochrome b5 reductase.";
Proc. Natl. Acad. Sci. U.S.A. 84:3609-3613(1987).
[11]
NUCLEOTIDE SEQUENCE [MRNA] OF 101-250.
Diss J.K.J., Fraser S.P., Coombes R.C., Djamgoz M.B.A.;
"Upregulation of voltage-gated Na+ channel expression and metastatic potential in human breast cancer: correlative studies on cell lines and biopsy tissues.";
Submitted (APR-2001) to the EMBL/GenBank/DDBJ databases.
[12]
PROTEIN SEQUENCE OF 2-25, AND MYRISTOYLATION AT GLY-2.
PubMed=2498303 [NCBI, ExPASy, EBI, Israel, Japan]
Murakami K., Yubisui T., Takeshita M., Miyata T.;
"The NH2-terminal structures of human and rat liver microsomal NADH-cytochrome b5 reductases.";
J. Biochem. 105:312-317(1989).
[13]
PROTEIN SEQUENCE OF 27-301.
TISSUE=Erythrocyte;
PubMed=3700359 [NCBI, ExPASy, EBI, Israel, Japan]
Yubisui T., Miyata T., Iwanaga S., Tamura M., Takeshita M.;
"Complete amino acid sequence of NADH-cytochrome b5 reductase purified from human erythrocytes.";
J. Biochem. 99:407-422(1986).
[14]
PROTEIN SEQUENCE OF 27-301.
TISSUE=Erythrocyte;
PubMed=6389526 [NCBI, ExPASy, EBI, Israel, Japan]
Yubisui T., Miyata T., Iwanaga S., Tamura M., Yoshida S., Takeshita M., Nakajima H.;
"Amino acid sequence of NADH-cytochrome b5 reductase of human erythrocytes.";
J. Biochem. 96:579-582(1984).
[15]
ALTERNATIVE PROMOTER USAGE.
PubMed=9639531 [NCBI, ExPASy, EBI, Israel, Japan]
Bulbarelli A., Valentini A., De Silvestris M., Cappellini M.D., Borgese N.;
"An erythroid-specific transcript generates the soluble form of NADH-cytochrome b5 reductase in humans.";
Blood 92:310-319(1998).
[16]
MUTAGENESIS OF CYSTEINE RESIDUES.
PubMed=2019583 [NCBI, ExPASy, EBI, Israel, Japan]
Shirabe K., Yubisui T., Nishino T., Takeshita M.;
"Role of cysteine residues in human NADH-cytochrome b5 reductase studied by site-directed mutagenesis. Cys-273 and Cys-283 are located close to the NADH-binding site but are not catalytically essential.";
J. Biol. Chem. 266:7531-7536(1991).
[17]
X-RAY CRYSTALLOGRAPHY (1.75 ANGSTROMS) OF 31-301.
DOI=10.1107/S0907444904020645; PubMed=15502298 [NCBI, ExPASy, EBI, Israel, Japan]
Bando S., Takano T., Yubisui T., Shirabe K., Takeshita M., Nakagawa A.;
"Structure of human erythrocyte NADH-cytochrome b5 reductase.";
Acta Crystallogr. D 60:1929-1934(2004).
[18]
VARIANT HM PRO-128.
PubMed=1898726 [NCBI, ExPASy, EBI, Israel, Japan]
Yubisui T., Shirabe K., Takeshita M., Kobayashi Y., Fukumaki Y., Sakaki Y., Takano T.;
"Structural role of serine 127 in the NADH-binding site of human NADH-cytochrome b5 reductase.";
J. Biol. Chem. 266:66-70(1991).
[19]
VARIANTS HM GLN-58 AND PRO-149.
PubMed=1707593 [NCBI, ExPASy, EBI, Israel, Japan]
Katsube T., Sakamoto N., Kobayashi Y., Seki R., Hirano M., Tanishima K., Tomoda A., Takazakura E., Yubisui T., Takeshita M., Sakaki Y., Fukumaki Y.;
"Exonic point mutations in NADH-cytochrome B5 reductase genes of homozygotes for hereditary methemoglobinemia, types I and III: putative mechanisms of tissue-dependent enzyme deficiency.";
Am. J. Hum. Genet. 48:799-808(1991).
[20]
VARIANT HM MET-106.
PubMed=1400360 [NCBI, ExPASy, EBI, Israel, Japan]
Shirabe K., Yubisui T., Borgese N., Tang C.-Y., Hultquist D.E., Takeshita M.;
"Enzymatic instability of NADH-cytochrome b5 reductase as a cause of hereditary methemoglobinemia type I (red cell type).";
J. Biol. Chem. 267:20416-20421(1992).
[21]
VARIANT HM PHE-299 DEL.
PubMed=8119939 [NCBI, ExPASy, EBI, Israel, Japan]
Shirabe K., Fujimoto Y., Yubisui T., Takeshita M.;
"An in-frame deletion of codon 298 of the NADH-cytochrome b5 reductase gene results in hereditary methemoglobinemia type II (generalized type). A functional implication for the role of the COOH-terminal region of the enzyme.";
J. Biol. Chem. 269:5952-5957(1994).
[22]
VARIANTS HM ARG-204 AND MET-273 DEL.
PubMed=7718898 [NCBI, ExPASy, EBI, Israel, Japan]
Vieira L.M., Kaplan J.-C., Kahn A., Leroux A.;
"Four new mutations in the NADH-cytochrome b5 reductase gene from patients with recessive congenital methemoglobinemia type II.";
Blood 85:2254-2262(1995).
[23]
VARIANT SER-117.
DOI=10.1007/s004390050347; PubMed=9048929 [NCBI, ExPASy, EBI, Israel, Japan]
Jenkins M.M., Prchal J.T.;
"A high-frequency polymorphism of NADH-cytochrome b5 reductase in African-Americans.";
Hum. Genet. 99:248-250(1997).
[24]
VARIANT HM PRO-73.
DOI=10.1046/j.1365-2141.1998.00782.x; PubMed=9695975 [NCBI, ExPASy, EBI, Israel, Japan]
Wu Y.-S., Huang C.-H., Wan Y., Huang Q.-J., Zhu Z.-Y.;
"Identification of a novel point mutation (Leu72-to-Pro) in the NADH-cytochrome b5 reductase gene of a patient with hereditary methaemoglobinaemia type I.";
Br. J. Haematol. 102:575-577(1998).
[25]
NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 76-83 AND 171-187, AND VARIANT HM VAL-179.
DOI=10.1046/j.1365-2141.1998.01123.x; PubMed=9886302 [NCBI, ExPASy, EBI, Israel, Japan]
Higasa K., Manabe J.I., Yubisui T., Sumimoto H., Pung-Amritt P., Tanphaichitr V.S., Fukumaki Y.;
"Molecular basis of hereditary methaemoglobinaemia, types I and II: two novel mutations in the NADH-cytochrome b5 reductase gene.";
Br. J. Haematol. 103:922-930(1998).
[26]
VARIANT HM TYR-204.
PubMed=10807796 [NCBI, ExPASy, EBI, Israel, Japan]
Wang Y., Wu Y.-S., Zheng P.-Z., Yang W.-X., Fang G.-A., Tang Y.-C., Xie F., Lan F.-H., Zhu Z.-Y.;
"A novel mutation in the NADH-cytochrome b5 reductase gene of a Chinese patient with recessive congenital methemoglobinemia.";
Blood 95:3250-3255(2000).
[27]
VARIANT HM GLN-58.
PubMed=15622768 [NCBI, ExPASy, EBI, Israel, Japan]
Huang C.-H., Xie Y., Wang Y., Wu Y.-S.;
"Arginine-glutamine replacement at residue 57 of NADH-cytochrome b5 reductase in Chinese hereditary methemoglobinemia.";
Zhonghua Xue Ye Xue Za Zhi 18:200-203(1997).
[28]
VARIANTS HM GLU-256 DEL AND ASP-292.
DOI=10.1182/blood-2002-05-1405; PubMed=12393396 [NCBI, ExPASy, EBI, Israel, Japan]
Percy M.J., Gillespie M.J.S., Savage G., Hughes A.E., McMullin M.F., Lappin T.R.J.;
"Familial idiopathic methemoglobinemia revisited: original cases reveal 2 novel mutations in NADH-cytochrome b5 reductase.";
Blood 100:3447-3449(2002).
[29]
CHARACTERIZATION OF VARIANTS HM GLU-256 DEL AND ASP-292.
DOI=10.1111/j.1365-2141.2005.05526.x; PubMed=15953014 [NCBI, ExPASy, EBI, Israel, Japan]
Percy M.J., Crowley L.J., Davis C.A., McMullin M.F., Savage G., Hughes J., McMahon C., Quinn R.J.M., Smith O., Barber M.J., Lappin T.R.J.;
"Recessive congenital methaemoglobinaemia: functional characterization of the novel D239G mutation in the NADH-binding lobe of cytochrome b5 reductase.";
Br. J. Haematol. 129:847-853(2005).
Comments
  • FUNCTION: Desaturation and elongation of fatty acids, cholesterol biosynthesis, drug metabolism, and, in erythrocyte, methemoglobin reduction.
  • CATALYTIC ACTIVITY: NADH + 2 ferricytochrome b5 = NAD+ + H+ + 2 ferrocytochrome b5.
  • COFACTOR: FAD.
  • SUBUNIT: Component of a complex composed of cytochrome b5, NADH-cytochrome b5 reductase (CYB5R3) and MOSC2 (By similarity).
  • SUBCELLULAR LOCATION: Isoform 1: Endoplasmic reticulum membrane; Lipid-anchor; Cytoplasmic side. Mitochondrion outer membrane; Lipid-anchor; Cytoplasmic side.
  • SUBCELLULAR LOCATION: Isoform 2: Cytoplasm. Note=Produces the soluble form found in erythrocytes.
  • ALTERNATIVE PRODUCTS: 2 named isoforms [FASTA] produced by alternative promoter usage.
    Name1
    SynonymsM
    Isoform IDP00387-1
    This is the isoform sequence displayed in this entry.
    Name2
    SynonymsS
    Isoform IDP00387-2
    Features which should be applied to build the isoform sequence: VSP_010200.
  • TISSUE SPECIFICITY: Isoform 2 (soluble form) is expressed at late stages of erythroid maturation.
  • POLYMORPHISM: Ser-117 seems to only be found in persons of African origin. The allele frequency is 0.23 in African Americans. It was not found in Caucasians, Asians, Indo-Aryans, or Arabs. There seems to be no effect on the enzyme activity.
  • DISEASE: Defects in CYB5R3 are the cause of hereditary methemoglobinemia (HM) [MIM:250800]. There are three forms of this disease: type 1 (HM1) in which the enzyme is only deficient in erythrocytes with a mild cyanosis; type 2 (HM2), in which the enzyme is completely deficient; type 3 (HM3) where the deficiency is seen in all blood cells. Type 2 is a severe form accompanied with mental retardation and neurological impairment.
  • SIMILARITY: Belongs to the flavoprotein pyridine nucleotide cytochrome reductase family.
  • SIMILARITY: Contains 1 FAD-binding FR-type domain.
Copyright
Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.
Cross-references
Sequence databases
EMBL
M28713; AAA59900.1; -; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28705; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28706; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28707; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28708; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28709; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28710; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M28711; AAA59900.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
Y09501; CAA70696.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AF361370; AAL87744.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AJ010116; CAA09006.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AJ010117; CAA09007.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AJ010118; CAA09008.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
BT009821; AAP88823.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
CR456435; CAG30321.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AY341030; AAP88936.1; -; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AF061830; AAF06818.1; -; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AF061831; AAF06819.1; -; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
BC004821; AAH04821.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
Z93241; CAB42843.1; -; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AJ310899; CAC84523.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
AJ310900; CAC84524.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M16461; AAA52306.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
M16462; AAA52307.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
PIR JS0468; RDHUB5.
RefSeq NP_000389.1; -.
NP_001123291.1; -.
NP_015565.1; -.
UniGene Hs.700572
3D structure databases
PDB
1M91; Model; -; A=1-301.[ExPASy / RCSB / EBI]
1UMK; X-ray; 1.75 A; A=27-301.[ExPASy / RCSB / EBI]
Detailed list of linked structures.
PDBsum 1M91; -.
1UMK; -.
ModBase P00387.
Protein-protein interaction databases
IntAct P00387; -.
PTM databases
PhosphoSite P00387; -.
Polymorphism databases
NIEHS-SNPs CYB5R3.
2D gel databases
REPRODUCTION-2DPAGE IPI00446235; -.
Organism-specific databases
H-InvDB HIX0016545; -.
HGNC HGNC:2873; CYB5R3.
GenAtlas CYB5R3.
HPA HPA001566; -.
MIM 250800; gene+phenotype. [NCBI / EBI]
Orphanet 621; Hereditary methemoglobinemia, recessive.
PharmGKB PA27331; -.
GeneCards P00387.
Gene expression databases
ArrayExpress P00387; -.
CleanEx HS_CYB5R3; -.
GermOnline ENSG00000100243; Homo sapiens.
Ontologies
GO
GO:0005783; Cellular component: endoplasmic reticulum (inferred from direct assay from HPA).
GO:0005833; Cellular component: hemoglobin complex (traceable author statement from ProtInc).
GO:0016020; Cellular component: membrane (traceable author statement from ProtInc).
GO:0004128; Molecular function: cytochrome-b5 reductase activity (traceable author statement from ProtInc).
GO:0008015; Biological process: blood circulation (traceable author statement from ProtInc).
QuickGo view.
Family and domain databases
InterPro IPR001834; Cyt_B5_reductase.
IPR001709; FPN_cyt_redctse.
IPR008333; OxRdtase_FAD-bd.
IPR001433; OxRdtase_FAD/NAD_bd.
Graphical view of domain structure.
Pfam PF00970; FAD_binding_6; 1.
PF00175; NAD_binding_1; 1.
Pfam graphical view of domain structure.
PRINTS PR00406; CYTB5RDTASE.
PR00371; FPNCR.
PROSITE PS51384; FAD_FR; 1.
PROSITE graphical view of domain structure (profiles).
BLOCKS P00387.
ProtoNet P00387.
Genome annotation databases
Ensembl ENSG00000100243; Homo sapiens. [Contig view]
GeneID 1727; -.
KEGG hsa:1727; -.
Phylogenomic databases
HOVERGEN P00387; -.
Other
DrugBank DB00157; NADH.
NextBio 6983; -.
SOURCE CYB5R3; Homo sapiens.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
3D-structure; Acetylation; Alternative promoter usage; Cholesterol biosynthesis; Cytoplasm; Direct protein sequencing; Disease mutation; Endoplasmic reticulum; FAD; Flavoprotein; Lipid synthesis; Lipoprotein; Membrane; Mitochondrion; Mitochondrion outer membrane; Myristate; NAD; Oxidoreductase; Phosphoprotein; Polymorphism; Steroid biosynthesis; Sterol biosynthesis.
Features
SEVIEWER logo Feature table viewer FT aligner logo Feature aligner
KeyFrom   To Length Description FTId
INIT_MET   1     1        Removed (By similarity). 
CHAIN   2   301  300     NADH-cytochrome b5 reductase 3 membrane-bound form. PRO_0000019392
CHAIN   27   301  275     NADH-cytochrome b5 reductase 3 soluble form. PRO_0000019394
DOMAIN   40   152  113     FAD-binding FR-type. 
NP_BIND   132   147  16     FAD (By similarity). 
NP_BIND   171   206  36     FAD (By similarity). 
MOD_RES   42    42        N6-acetyllysine (By similarity). 
MOD_RES   120   120        N6-acetyllysine (By similarity). 
MOD_RES   130   130        Phosphotyrosine (By similarity). 
LIPID   2     2        N-myristoyl glycine. 
VAR_SEQ   1    23        Missing (in isoform 2). VSP_010200
VARIANT   58    58  1     R -> Q (in HM; type 1; 62% of activity). VAR_004619 [3D]
VARIANT   66    66  1     S -> P (in dbSNP:rs1130706 [NCBI]). VAR_018419 [3D]
VARIANT   73    73  1     L -> P (in HM; type 1). VAR_010750 [3D]
VARIANT   106   106  1     V -> M (in HM; type 1; 77% of activity). VAR_004620 [3D]
VARIANT   117   117  1     T -> S (in dbSNP:rs1800457 [NCBI]). VAR_010751 [3D]
VARIANT   128   128  1     S -> P (in HM; type 2; Hiroshima). VAR_004621 [3D]
VARIANT   149   149  1     L -> P (in HM; type 3). VAR_004622 [3D]
VARIANT   179   179  1     A -> V (in HM; type 1). VAR_010752 [3D]
VARIANT   204   204  1     C -> R (in HM; type 2). VAR_010753 [3D]
VARIANT   204   204  1     C -> Y (in HM; type 1). VAR_010754 [3D]
VARIANT   256   256  1     Missing (in HM; type 1; retains approximately 38% of residual diaphorase activity). VAR_037315
VARIANT   273   273  1     Missing (in HM; type 2). VAR_010755
VARIANT   292   292  1     G -> D (in HM; type 1; retains approximately 58% of residual diaphorase activity). VAR_037316 [3D]
VARIANT   299   299  1     Missing (in HM; type2; almost complete loss of activity). VAR_004623
CONFLICT   28    32        QRSTP -> RWPRA (in Ref. 10; AAA52307). 
CONFLICT   29    29        R -> G (in Ref. 1; AAA59900). 
CONFLICT   31    31        T -> K (in Ref. 4; CAA09006/CAA09007/CAA09008). 
CONFLICT   34    35        IT -> LA (in Ref. 10; AAA52307). 
CONFLICT   187   188        ML -> IV (in Ref. 4; CAA09006/CAA09007). 
CONFLICT   191   192        IR -> MS (in Ref. 4; CAA09006/CAA09007). 
CONFLICT   192   192        R -> G (in Ref. 10; AAA52306).