Oxaloacetate tautomerase FAHD1, mitochondrial

UniProtKB accession:  Q8R0F8

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UniProtKB description:  Tautomerase that converts enol-oxaloacetate, a strong inhibitor of succinate dehydrogenase, to the physiological keto form of oxaloacetate (By similarity). It is thereby required to maximize aerobic respiration efficiency by preventing succinate dehydrogenase inhibition (By similarity). Also acts as a weak oxaloacetate decarboxylase (ODx), catalyzing the decarboxylation of oxaloacetate (OAA) to pyruvate and CO(2), and as such is likely a regulatory enzyme in the TCA cycle (Probable) (PubMed:25575590, PubMed:32068790). Also displays acylpyruvase activity, being able to hydrolyze acetylpyruvate and fumarylpyruvate in vitro (PubMed:32068790).