Enables enzyme binding activity. Involved in apoptotic DNA fragmentation and positive regulation of phosphatidylserine exposure on apoptotic cell surface. Located in cytosol; mitochondrion; and nucleus. Human ortholog(s) of this gene implicated in Alzheimer's disease; X-linked recessive disease (multiple); and dilated cardiomyopathy 1H. Is an ortholog of human AIFM1 (apoptosis inducing factor mitochondria associated 1).