Lathosterol oxidase

In enzymology, a lathosterol oxidase (EC number|1.14.21.6) is an enzyme that catalyzes the chemical reaction

:5alpha-cholest-7-en-3beta-ol + NAD(P)H + H⁺ + O₂ $ightleftharpoons$ cholesta-5,7-dien-3beta-ol + NAD(P)+ + 2 H₂O

The 5 substrates of this enzyme are 5alpha-cholest-7-en-3beta-ol, NADH, NADPH, H⁺, and O₂, whereas its 4 products are cholesta-5,7-dien-3beta-ol, NAD⁺, NADP⁺, and H₂O.

This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with NADH or NADPH as one donor, and the other dehydrogenated. The systematic name of this enzyme class is 5alpha-cholest-7-en-3beta-ol,NAD(P)H:oxygen 5-oxidoreductase. Other names in common use include Delta7-sterol Delta5-dehydrogenase, Delta7-sterol 5-desaturase, Delta7-sterol-C5(6)-desaturase, and 5-DES. This enzyme participates in biosynthesis of steroids. It has 2 cofactors: FAD, and FMN.

References

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External links

::"The CAS registry number for this enzyme class is CAS registry|37255-37-1."