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In vitro methane and methyl coenzyme M formation from acetate: evidence that acetyl-CoA is the required intermediate activated form of acetate

, : In vitro methane and methyl coenzyme M formation from acetate: evidence that acetyl-CoA is the required intermediate activated form of acetate. Biochemical and Biophysical Research Communications 147(1): 254-258

Buffer-soluble extracts of acetate-grown Methanosarcina barkeri catalyzed methanogenesis from acetate in the presence of hydrogen and ATP. The rates of methane formation from either acetate plus ATP, or acetylphosphate without ATP added, were approximately doubled by the addition of coenzyme A (CoA). In vitro methyl group transfer from [2-14C]acetate to form [14CH3]methyl coenzyme M (14CH3S-CoM) was monitored by causing the accumulation of 14CH3S-CoM (14CH3-SCH2CH2SO3-) in the presence of 2-bromoethanesulfonate. The rate of 14CH3S-CoM formation was increased 2.5-fold by 0.2 mM CoA.


PMID: 3115259

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