Enables phosphatidate cytidylyltransferase activity. Predicted to be involved in CDP-diacylglycerol biosynthetic process and cardiolipin biosynthetic process. Located in mitochondrial inner membrane. Is extrinsic component of membrane. Orthologous to human TAMM41 (TAM41 mitochondrial translocator assembly and maintenance homolog). [provided by Alliance of Genome Resources, Apr 2022]