Английская Википедия:7-Dehydrocholesterol reductase

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Шаблон:Short description Шаблон:Infobox gene

7-Dehydrocholesterol reductase, also known as DHCR7, is a protein that in humans is encoded by the DHCR7 gene.[1][2][3]

Function

Шаблон:Infobox enzyme

The protein encoded by this gene is an enzyme catalyzing the production of cholesterol from 7-Dehydrocholesterol using NADPH.

The DHCR7 gene encodes delta-7-sterol reductase (EC 1.3.1.21), the ultimate enzyme of mammalian sterol biosynthesis that converts 7-dehydrocholesterol (7-DHC) to cholesterol. This enzyme removes the C(7-8) double bond introduced by the sterol delta8-delta7 isomerases. In addition, its role in drug-induced malformations is known: inhibitors of the last step of cholesterol biosynthesis such as AY9944 and BM15766 severely impair brain development.[1]

Pathology

A deficiency is associated with Smith–Lemli–Opitz syndrome.[4]

All house cats and dogs have higher-than-usual activity of this enzyme, causing an inability to synthesize vitamin D due to the lack of 7-dehydrocholesterol.[5]

Interactive pathway map

Шаблон:VitaminDSynthesis WP1531

See also

References

Шаблон:Reflist

Further reading

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Шаблон:Refend

External links

Шаблон:Ketone and cholesterol metabolism enzymes Шаблон:CH-CH oxidoreductases Шаблон:Enzymes Шаблон:Portal bar

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