Conversion of sterols and triterpenes by mycobacteria. II. Transformation of 7-oxygenated sterols into androstane derivatives via a 7-deoxygenation

Progesterone side-chain cleavage by Bacillus sphaericus

The side-chain of progesterone was cleaved by Bacillus sphaericus to produce two C-19 keto androstene steroids. The structures of these metabolites were androstenedione and 1-dehydroandrostenedione. High concentrations of glucose in the culture medium inhibited conversion of progesterone to these two metabolites.

Review of progress in sterol oxidations: 1987-1995

Material dealing with the chemistry, biochemistry, and biological activities of oxysterols is reviewed for the period 1987-1995. Particular attention is paid to the presence of oxysterols in tissues and foods and to their physiological relevance.

Current trends in microbial steroid biotransformation

Microbial transformations of various steroids are reviewed. Developmental studies on immobilization of microbial cells, techniques for selective transformation and better yields of desired metabolites are highlighted. The present position of microbial biotechnology in the steroid drug industry and the future prospects are discussed. Various steroid substrates, their metabolites and the micro-organisms used for the transformations are compiled covering the literature for the period late 1987-mid 1992.