Enables mitochondrial ribosome binding activity. Acts upstream of or within positive regulation of cell population proliferation and positive regulation of oxidative phosphorylation. Located in mitochondrion. Is expressed in several structures, including brain; early conceptus; intestine epithelium; and secondary oocyte. Used to study type 2 diabetes mellitus. Orthologous to human GADD45GIP1 (GADD45G interacting protein 1). [provided by Alliance of Genome Resources, Apr 2022]