[Regulation of acetate metabolism in a strain of Acinetobacter sp., growing on ethanol].
Ethanol metabolism in Acinetobacter sp. is limited by the rate of acetate assimilation in a reaction catalyzed by acetyl-CoA synthetase (EC 6.2.1.1). Effects of ions (sodium, potassium, and magnesium), byproducts of ethanol and acetaldehyde oxidation (NADH and NADPH), and pantothenic acid on this enzyme have been studied (sodium, NADH, and NADPH inhibit acetyl-CoA synthetase; pantothenic acid, potassium, and magnesium act as the enzyme activators). Conditions of culturing were developed, under which ethanol, acetaldehyde, and acetate in Acinetobacter cells were oxidized at the same rates, producing a threefold increase in the activity of acetyl-CoA synthetase in the cell-free extract. The results of studies of acetyl-CoA synthetase regulation in a mutant strain of Acinetobacter sp., which is incapable of forming exopolysaccharides, provide a basis for refining the technology of ethapolan production, involving the use of C2 substrates.
Pirog
T P
TP
Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, Kiev, 03143 Ukraine. tapirog@usuft.kiev.ua
Kuz'minskaia
Iu V
IuV
D000079:Acetaldehyde / Q000378:metabolism; D000106:Acetate-CoA Ligase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D000085:Acetates / Q000378:metabolism*; D000150:Acinetobacter / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D003470:Culture Media; D004789:Enzyme Activation / Q000187:drug effects; D000431:Ethanol / Q000378:metabolism*; D008274:Magnesium / Q000494:pharmacology; D009154:Mutation; D009243:NAD / Q000378:metabolism; D009249:NADP / Q000378:metabolism; D010205:Pantothenic Acid / Q000494:pharmacology; D011188:Potassium / Q000494:pharmacology; D012964:Sodium / Q000494:pharmacology
D000085:Acetates; D003470:Culture Media; D009243:NAD; D010205:Pantothenic Acid; D000431:Ethanol; D009249:NADP; D012964:Sodium; D000106:Acetate-CoA Ligase; D000079:Acetaldehyde; D008274:Magnesium; D011188:Potassium