The separation of pyruvate-ferredoxin oxidoreductase from Clostridium pasteurianum into two enzymes catalyzing different reactions

Abstract

The ferredoxin requiring cleavage of pyruvate to acetyl-CoA and CO2 is catalyzed by pyruvate ferredoxin oxidoreductase (pyruvate:ferredoxin oxidoreductase (CoA-acetylating):, EC 1.2.7.1). The same enzyme is thought to catalyze the reversal of this reaction, i.e. the synthesis of pyruvate from acetyl-CoA and CO2 in the presence of reduced ferredoxin. Evidence is presented that the forward and reverse reactions are catalyzed not by one, but by two proteins that are clearly separable by Sephadex G-200 gel filtration.