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  • Title: Steroid sulfotransferase in hamster epididymis.
    Author: Bouthillier M, Chapdelaine A, Bleau G, Roberts KD.
    Journal: Steroids; 1981 Nov; 38(5):523-35. PubMed ID: 6948422.
    Abstract:
    Steroid sulfotransferase activity is present in the cytosol fraction of hamster epididymis. The activity of this enzyme is increased by magnesium ion. Cysteine is essential to assure optimal activity. Adenosine-3'-phosphate-5'-phosphosulfate is required as sulfate donor and an apparent Km of 62 microM was calculated. Inhibition studies suggest that this enzyme preferentially catalyzes the sulfurylation of the 3 beta-hydroxyl group of delta 5-steroids. An unusual feature of the enzyme is a pH optimum at pH 10.
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