Zakelj-Mavric M, Belic I. Hydroxylation of steroids with 11 alpha-hydroxylase of Rhizopus nigricans.
JOURNAL OF STEROID BIOCHEMISTRY 1987;
28:197-201. [PMID:
3498094 DOI:
10.1016/0022-4731(87)90378-5]
[Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Three groups of 3-keto-4-ene steroids with different side chains were used as substrates for the induced 11 alpha-hydroxylase of Rhizopus nigricans. The highest total bioconversion as well as the highest yield of 11 alpha-hydroxylated product is found using progesterone as substrate. By changing the polarity of the side chain, much higher yields of 6 beta- and 7 beta-hydroxylated products relative to 11 alpha-hydroxylated product are obtained. Our results thus provide evidence for the importance of the side chain in steroid-enzyme interactions.
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