Enables enzyme binding activity. Involved in positive regulation of axon extension; response to organic cyclic compound; and response to xenobiotic stimulus. Located in mitochondrion. Human ortholog(s) of this gene implicated in Friedreich ataxia; Friedreich ataxia 1; and type 2 diabetes mellitus. Orthologous to human FXN (frataxin). [provided by Alliance of Genome Resources, Apr 2022]