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. 1974 Aug;142(2):421-7.
doi: 10.1042/bj1420421.

Sterol biosynthesis by the sea urchin Echinus esculentus

A G Smith, L J Goad

Sterol biosynthesis by the sea urchin Echinus esculentus

A G Smith et al. Biochem J. 1974 Aug.

Abstract

1. The 4-demethyl sterols of Echinus esculentus consisted of cholesterol as the major component, with lower concentrations of nine other C(26), C(27), C(28) and C(29) Delta(5) sterols. 2. [2-(14)C]Mevalonic acid was readily incorporated by the urchin into squalene, lanosterol and desmosterol but only to a small extent into cholesterol. 3. [26-(14)C]Desmosterol did not appear to be reduced to give cholesterol, but conversion of 5alpha-[2-(3)H(2)]lanost-8-en-3beta-ol into cholesterol was observed. 4. No C-24 dealkylation of [4-(14)C]sitosterol or metabolism of [4-(14)C]cholesterol could be detected.

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