Required for mitochondrial translation, possibly by coordinating the assembly or maintenance of the mitochondrial ribosome (PubMed:23022098, PubMed:25604853). {ECO:0000269|PubMed:23022098, ECO:0000269|PubMed:25604853}. This is the function of ENSG00000155906 (RMND1, required for meiotic nuclear division 1 homolog).