Enables transmembrane transporter binding activity. Involved in several processes, including negative regulation of autophagy of mitochondrion; negative regulation of protein ubiquitination; and protein localization to mitochondrion. Located in mitochondrion. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; hemolymphoid system; and sensory organ. Orthologous to human TSPO (translocator protein). [provided by Alliance of Genome Resources, Apr 2022]