Predicted to enable 5-formyltetrahydrofolate cyclo-ligase activity; anion binding activity; and double-stranded DNA binding activity. Predicted to be involved in DNA geometric change; folic acid-containing compound metabolic process; and termination of mitochondrial transcription. Located in mitochondrion. Is expressed in several structures, including alimentary system; genitourinary system; integumental system; nervous system; and sensory organ. Orthologous to several human genes including ST20-MTHFS (ST20-MTHFS readthrough). [provided by Alliance of Genome Resources, Apr 2022]