[20alpha- and 20beta-reduction of steroids by immobilized enzyme preparations and Bacillus megaterium cells]. 1976

K A Koshcheenko, and L A Krasnova, and L K Garsiia-Rodriges, and V I Surovtsev, and G K Skriabin

Cells of Bacillus megaterium immobilized due to incorporation into polyacrylamide gel retained their viability. They differed significantly in their enzymic activity from free cells: 20alpha- and 20beta-hydroxysteroid dehydrogenase activites were substantially decreased and they also showed the capacity to synthesize significant quantities of a new derivative and to destruct steroids. Immobolized protein fractions maintained 20alpha-hydroxysteroid dehydrogenase and 20beta-hydroxysteroid dehydrogenase activities but their specific activites were lower than those of native protein fractions. It is suggested that the synthesis of new compounds was induced by acrylamide that was bound during polymerization.

UI MeSH Term Description Entries
D002384 Catalysis The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction. Catalyses
D004800 Enzymes, Immobilized Enzymes which are immobilized on or in a variety of water-soluble or water-insoluble matrices with little or no loss of their catalytic activity. Since they can be reused continuously, immobilized enzymes have found wide application in the industrial, medical and research fields. Immobilized Enzymes,Enzyme, Immobilized,Immobilized Enzyme
D006913 Hydroxysteroid Dehydrogenases Enzymes of the oxidoreductase class that catalyze the dehydrogenation of hydroxysteroids. (From Enzyme Nomenclature, 1992) EC 1.1.-. Hydroxysteroid Dehydrogenase,Dehydrogenase, Hydroxysteroid,Dehydrogenases, Hydroxysteroid
D001410 Bacillus megaterium A species of bacteria whose spores vary from round to elongate. It is a common soil saprophyte. Bacillus megatherium
D013256 Steroids A group of polycyclic compounds closely related biochemically to TERPENES. They include cholesterol, numerous hormones, precursors of certain vitamins, bile acids, alcohols (STEROLS), and certain natural drugs and poisons. Steroids have a common nucleus, a fused, reduced 17-carbon atom ring system, cyclopentanoperhydrophenanthrene. Most steroids also have two methyl groups and an aliphatic side-chain attached to the nucleus. (From Hawley's Condensed Chemical Dictionary, 11th ed) Steroid,Catatoxic Steroids,Steroids, Catatoxic

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