The role of histidines in the acetate kinase from Methanosarcina thermophila.


The role of histidine in the catalytic mechanism of acetate kinase from Methanosarcina thermophila was investigated by diethylpyrocarbonate inactivation and site-directed mutagenesis. Inactivation was accompanied by an increase in absorbance at 240 nm with no change in absorbance at 280 nm, and treatment of the inactivated enzyme with hydroxylamine restored… (More)


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