NQO2

NAD(P)H dehydrogenase, quinone 2
PDB rendering based on 1qr2.
Available structures PDB 1QR2, 1SG0, 1XI2, 1ZX1, 2BZS, 2QMY, 2QMZ, 2QR2, 2QWX, 2QX4, 2QX6, 2QX8, 2QX9, 3FW1, 3G5M, 3GAM
Identifiers
Symbols	NQO2; DHQV; DIA6; FLJ39868; NMOR2; QR2
External IDs	OMIM: 160998 MGI: 104513 HomoloGene: 696 GeneCards: NQO2 Gene
EC number	1.10.99.2
Gene Ontology Molecular function • dihydronicotinamide riboside quinone reductase activity • NADPH dehydrogenase (quinone) activity • electron carrier activity • metal ion binding • coenzyme binding Cellular component • nucleus • nucleolus • cytoplasm Biological process • electron transport Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	4835	18105
Ensembl	ENSG00000124588	ENSMUSG00000046949
UniProt	P16083	Q9JI75
RefSeq (mRNA)	NM_000904	NM_020282
RefSeq (protein)	NP_000895	NP_064678
Location (UCSC)	Chr 6: 2.99 – 3.02 Mb	Chr 13: 34.06 – 34.08 Mb
PubMed search	[1]	[2]

NAD(P)H dehydrogenase, quinone 2, also known as NQO2 or QR2, is a human gene. It is a phase II detoxification enzyme which can carry out two or four electron reductions. Its mechanism of reduction is via a covalently bound zinc ion and a cocrystalized FAD. NQO2 contains two chains homologous in AA sequence but 7% different in structure. As a result, NQO2 contains two similar yet unique active sites. An important function of NQO2 is its activation on NRH. NQO2 can be inhibited by resveratrol.^[1]

References

1. ^ "Entrez Gene: NQO2 NAD(P)H dehydrogenase, quinone 2". http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=4835. 

Further reading

• Jaiswal AK, Burnett P, Adesnik M, McBride OW (1990). "Nucleotide and deduced amino acid sequence of a human cDNA (NQO2) corresponding to a second member of the NAD(P)H:quinone oxidoreductase gene family. Extensive polymorphism at the NQO2 gene locus on chromosome 6.". Biochemistry 29 (7): 1899–906. doi:10.1021/bi00459a034. PMID 1691923. 
• Jaiswal AK (1994). "Human NAD(P)H:quinone oxidoreductase2. Gene structure, activity, and tissue-specific expression.". J. Biol. Chem. 269 (20): 14502–8. PMID 8182056. 
• Zhao Q, Yang XL, Holtzclaw WD, Talalay P (1997). "Unexpected genetic and structural relationships of a long-forgotten flavoenzyme to NAD(P)H:quinone reductase (DT-diaphorase)". Proc. Natl. Acad. Sci. U.S.A. 94 (5): 1669–74. doi:10.1073/pnas.94.5.1669. PMC 19974. PMID 9050836. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=19974. 
• Wu K, Knox R, Sun XZ, et al. (1997). "Catalytic properties of NAD(P)H:quinone oxidoreductase-2 (NQO2), a dihydronicotinamide riboside dependent oxidoreductase.". Arch. Biochem. Biophys. 347 (2): 221–8. doi:10.1006/abbi.1997.0344. PMID 9367528. 
• Foster CE, Bianchet MA, Talalay P, et al. (1999). "Crystal structure of human quinone reductase type 2, a metalloflavoprotein.". Biochemistry 38 (31): 9881–6. doi:10.1021/bi990799v. PMID 10433694. 
• Jaiswal AK, Bell DW, Radjendirane V, Testa JR (1999). "Localization of human NQO1 gene to chromosome 16q22 and NQO2-6p25 and associated polymorphisms.". Pharmacogenetics 9 (3): 413–8. doi:10.1097/00008571-199906000-00020. PMID 10471077. 
• Harada S, Fujii C, Hayashi A, Ohkoshi N (2001). "An association between idiopathic Parkinson's disease and polymorphisms of phase II detoxification enzymes: glutathione S-transferase M1 and quinone oxidoreductase 1 and 2.". Biochem. Biophys. Res. Commun. 288 (4): 887–92. doi:10.1006/bbrc.2001.5868. PMID 11688992. 
• Strassburg A, Strassburg CP, Manns MP, Tukey RH (2002). "Differential gene expression of NAD(P)H:quinone oxidoreductase and NRH:quinone oxidoreductase in human hepatocellular and biliary tissue.". Mol. Pharmacol. 61 (2): 320–5. doi:10.1124/mol.61.2.320. PMID 11809856. 
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=139241. 
• Okubo T, Harada S, Higuchi S, Matsushita S (2004). "Association analyses between polymorphisms of the phase II detoxification enzymes (GSTM1, NQO1, NQO2) and alcohol withdrawal symptoms.". Alcohol. Clin. Exp. Res. 27 (8 Suppl): 68S–71S. doi:10.1097/01.ALC.0000078616.63296.41. PMID 12960511. 
• Ostrousky O, Meged S, Loewenthal R, et al. (2004). "NQO2 gene is associated with clozapine-induced agranulocytosis.". Tissue Antigens 62 (6): 483–91. doi:10.1046/j.1399-0039.2003.00133.x. PMID 14617031. 
• Harada S, Tachikawa H, Kawanishi Y (2005). "A possible association between an insertion/deletion polymorphism of the NQO2 gene and schizophrenia.". Psychiatr. Genet. 13 (4): 205–9. doi:10.1097/01.ypg.0000071601.59979.47. PMID 14639047. 
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs.". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039. 
• Kwiek JJ, Haystead TA, Rudolph J (2004). "Kinetic mechanism of quinone oxidoreductase 2 and its inhibition by the antimalarial quinolines.". Biochemistry 43 (15): 4538–47. doi:10.1021/bi035923w. PMID 15078100. 
• Buryanovskyy L, Fu Y, Boyd M, et al. (2004). "Crystal structure of quinone reductase 2 in complex with resveratrol.". Biochemistry 43 (36): 11417–26. doi:10.1021/bi049162o. PMID 15350128. 
• Wang W, Jaiswal AK (2005). "Sp3 repression of polymorphic human NRH:quinone oxidoreductase 2 gene promoter.". Free Radic. Biol. Med. 37 (8): 1231–43. doi:10.1016/j.freeradbiomed.2004.06.042. PMID 15451063. 
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=528928. 
• Hsieh TC, Wang Z, Hamby CV, Wu JM (2005). "Inhibition of melanoma cell proliferation by resveratrol is correlated with upregulation of quinone reductase 2 and p53.". Biochem. Biophys. Res. Commun. 334 (1): 223–30. doi:10.1016/j.bbrc.2005.06.073. PMID 15993843. 
• Fu Y, Buryanovskyy L, Zhang Z (2005). "Crystal structure of quinone reductase 2 in complex with cancer prodrug CB1954.". Biochem. Biophys. Res. Commun. 336 (1): 332–8. doi:10.1016/j.bbrc.2005.08.081. PMID 16129418. 
• Rual JF, Venkatesan K, Hao T, et al. (2005). "Towards a proteome-scale map of the human protein-protein interaction network.". Nature 437 (7062): 1173–8. doi:10.1038/nature04209. PMID 16189514.