cholesterol 7-desaturase EC#: 1.14.19.21; ChemWhat Code: 1375786

Product Name cholesterol 7-desaturase
Example Structure Example Structure of cholesterol 7-desaturase EC#: 1.14.19.21
Synonyms C-7 cholesterol desaturase, C7-Des, cholesterol 7,8-dehydrogenase, DAF-36, DAF-36/Neverland, Des7, Des7p, Neverland, Nvd, PmNvd, Rieske domain oxygenase Neverland, sterol C7(8)-desaturase
EC Number 1.14.19.21
CAS Registry Number
Comments The enzyme, characterized from several organisms including the worm Caenorhabditis elegans, the fly Drosophila melanogaster, and the ciliate Tetrahymena thermophila, is a Rieske oxygenase. In insects it participates in the the biosythesis of ecdysteroid hormones. The electrons are transferred from NAD(P)H via an electron transfer chain likely to include ferredoxin reductase and ferredoxin. The enzyme differs from regular desaturases, such as EC 1.14.19.20, 7-sterol 5(6)-desaturase, which are cytochrome b5-dependent and contain the three His-boxes that are typical to most desaturases.
Cofactor
History
Reactions Cholesterol + O(2) + NAD(P)H = cholesta-5,7-dien-3-beta-ol + NAD(P)(+) + 2 H(2)O.

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