Probable mitochondrial acylpyruvase which is able to hydrolyze acetylpyruvate and fumarylpyruvate in vitro (By similarity). Also has oxaloacetate decarboxylase activity (PubMed:25575590). a 3-acylpyruvate + H2O = a carboxylate + H(+) + pyruvate H(+) + oxaloacetate = CO2 + pyruvate Homodimer. Ubiquitous with higher expression in the liver and the kidney (at protein level). No visible phenotype. Elevated oxaloacetate levels. Belongs to the FAH family. Truncated N-terminus.