Binds to type I and II regulatory subunits of protein kinase A and anchors them to the cytoplasmic face of the mitochondrial outer membrane (By similarity). Involved in mitochondrial-mediated antiviral innate immunity . Promotes translocation of NDUFS1 into mitochondria to regulate mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) activity (By similarity).
Subcellular locations: Mitochondrion outer membrane, Mitochondrion
Isoform 1 is detected in thymus, prostate, testis, ovary, colon and small intestine . Isoform 2 is highly expressed in testis and detected at much lower levels in kidney, pancreas, liver, lung and brain .