Pyruvate formate lyase catalyzes a key step in anaerobic glycolysis, the conversion of pyruvate and CoenzymeA to formate and acetylCoA. The PFL mechanism involves an unusual radical cleavage of pyruvate in which two cysteines and one glycine form radicals that are required for catalysis. PFL has a ten-stranded alpha/beta barrel domain that is structurally similar to those of all three ribonucleotide reductase (RNR) classes as well as benzylsuccinate synthase and B12-independent glycerol dehydratase.
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