title: Activities of oxidative enzymes in mycoplasmas.
abstract: The activities of several oxidoreductases were measured in three fermentative and two nonfermentative Mycoplasma species that were grown under aerobic or anaerobic conditions. Acholeplasma laidlawii MG, Mycoplasma hyorhinis GDL, and Mycoplasma pneumoniae FH had very high apparent activities of pyruvate dehydrogenase and pyruvate dehydrogenase complex compared with the activities of mammalian fibroblasts or human platelet-enriched preparations, while Mycoplasma salivarium VV and Mycoplasma arthritidis 07 had very low apparent activities of these two enzymes. Strictly anaerobic growth diminished both enzymatic activities. The activity of alpha-ketoglutarate dehydrogenase complex was minimal in all five mycoplasmas that were grown under aerobic conditions, anaerobic conditions, or both. All the mycoplasmas that were examined exhibited lactate dehydrogenase and NADH-dichlorophenol indophenol oxidoreductase activities. The properties of mycoplasmal pyruvate dehydrogenase complex suggest that it differs from the mammalian enzyme.
mesh_terms: D001151:Arsenic / Q000494:pharmacology; D018053:Arsenites; D003065:Coenzyme A / Q000378:metabolism; D004734:Energy Metabolism; D006358:Hot Temperature; D007655:Ketoglutarate Dehydrogenase Complex / Q000378:metabolism; D007700:Kinetics; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D009174:Mycoplasma / Q000201:enzymology* / Q000378:metabolism; D009243:NAD / Q000378:metabolism; D011768:Pyruvate Dehydrogenase Complex / Q000378:metabolism; D011808:Quinone Reductases / Q000378:metabolism
chemical_list: D018053:Arsenites; D011768:Pyruvate Dehydrogenase Complex; D009243:NAD; D007770:L-Lactate Dehydrogenase; D007655:Ketoglutarate Dehydrogenase Complex; D011808:Quinone Reductases; C033633:dichlorophenolindophenol reductase; C015001:arsenite; D001151:Arsenic; D003065:Coenzyme A