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Comparative Study
. 1992 Sep 16;187(2):760-6.
doi: 10.1016/0006-291x(92)91260-w.

Human hepatic 3 alpha-hydroxysteroid dehydrogenase: possible identity with human hepatic chlordecone reductase

J M Binstock  1 , R B Iyer, C V Hamby, V A Fried, I S Schwartz, B I Weinstein, A L Southren
Affiliations
Comparative Study

Human hepatic 3 alpha-hydroxysteroid dehydrogenase: possible identity with human hepatic chlordecone reductase

J M Binstock et al. Biochem Biophys Res Commun. .

Abstract

3 alpha-Hydroxysteroid dehydrogenase is a cytosolic, monomeric, NADPH-dependent oxidoreductase which reduces 3-keto-5-dihydrosteroids to their tetrahydro products. We present here the first partial amino acid sequence data for the human liver enzyme and show these sequences to be identical to the deduced amino acid sequence for human hepatic chlordecone reductase. In addition, these two enzymes exhibit similar substrate and cofactor specificities and immunological reactivity. The results suggest that the natural substrates for chlordecone reductase are 3-keto-5-dihydrosteroids and that these two proteins may be identical.

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