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NAD(P)H dehydrogenase (quinone 1) : ウィキペディア英語版 | NAD(P)H dehydrogenase (quinone 1)
NAD(P)H dehydrogenase () 1 is an enzyme that in humans is encoded by the ''NQO1'' gene. This protein-coding gene is a member of the NAD(P)H dehydrogenase (quinone) family and encodes a 2-electron reductase (enzyme). This FAD-binding protein forms homodimers and performs two-electron reduction of quinones to hydroquinones and of other redox dyes. It has a preference for short-chain acceptor quinones, such as ubiquinone, benzoquinone, juglone and duroquinone. This gene has an important paralog NQO2. This protein is located in the cytosol.〔(【引用サイトリンク】url=http://compartments.jensenlab.org/Entity?figures=subcell_cell_%&knowledge=10&textmining=10&experiments=10&predictions=10&type1=9606&type2=-22&id1=ENSP00000319788 )〕 NQO1 enzyme expression can be induced by dioxin and inhibited by dicoumarol. == Function ==
This gene is a member of the NAD(P)H dehydrogenase (quinone) family and encodes a cytoplasmic 2-electron reductase. This FAD-binding protein forms homodimers and reduces quinones to hydroquinones. This protein's enzymatic activity prevents the one electron reduction of quinones that results in the production of radical species.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=1728 )〕 The ubiquitin-independent p53 degradation pathway is regulated by NQO1. NQO1 stabilizes p53, protecting it from degradation. Individuals with decreased NQO1 expression/activity have reduced p53 stability, which may lead to resistance to drugs such as chemotherapeutics.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「NAD(P)H dehydrogenase (quinone 1)」の詳細全文を読む
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