Abstract
3 beta-Methylbacteriohopanepolyol derivatives were isolated from three bacteria, Acetobacter pasteurianus ssp. pasteurianus, Methylococcus capsulatus and Nostoc muscorum, and identified by spectroscopic methods and direct comparison with 3 beta-methyldiplopterol and 3 beta-methylhopan-29-ol synthesized from 22-hydroxyhopan-3-one. The 3 beta-methylhopanoid content of A. pasteurianus ssp. pasteurianus could be dramatically increased (up to 60% of the total hopanoid content) by addition of L-methionine, the actual methyl donor, to the culture medium.
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