Predicted to enable hydrolase activity, acting on acid carbon-carbon bonds, in ketonic substances; protein homodimerization activity; and pyridoxal phosphate binding activity. Predicted to be involved in several processes, including aromatic amino acid family metabolic process; pyridine-containing compound biosynthetic process; and response to interferon-gamma. Predicted to act upstream of or within pyridine nucleotide biosynthetic process. Located in mitochondrion. Human ortholog(s) of this gene implicated in hydroxykynureninuria. Orthologous to human KYNU (kynureninase). [provided by Alliance of Genome Resources, Apr 2022]