Predicted to enable electron transfer activity; heme binding activity; and metal ion binding activity. Involved in determination of adult lifespan and proton motive force-driven mitochondrial ATP synthesis. Predicted to be located in mitochondrial inner membrane. Predicted to be part of mitochondrial respiratory chain complex III. Expressed in several structures, including germ line. Human ortholog(s) of this gene implicated in mitochondrial complex III deficiency nuclear type 6. Is an ortholog of human CYC1 (cytochrome
c1).