Enables mRNA binding activity; mitochondrial ribosome binding activity; and rRNA binding activity. Acts upstream of or within several processes, including mitochondrial cytochrome c oxidase assembly; motor learning; and regulation of cytochrome-c oxidase activity. Located in mitochondrion. Is expressed in several structures, including alimentary system; nervous system; nose; orbito-sphenoid; and pharyngo-tympanic tube. Human ortholog(s) of this gene implicated in cytochrome-c oxidase deficiency disease. Orthologous to human TACO1 (translational activator of cytochrome c oxidase I). [provided by Alliance of Genome Resources, Apr 2022]