Enables molecular adaptor activity. Predicted to be involved in cristae formation and mitochondrial fusion. Located in mitochondrial inner membrane. Is expressed in central nervous system; liver lobe; orbito-sphenoid; retina; and thymus primordium. Orthologous to human CHCHD3 (coiled-coil-helix-coiled-coil-helix domain containing 3). [provided by Alliance of Genome Resources, Apr 2022]