Predicted to enable URM1 activating enzyme activity; nucleotidyltransferase activity; and sulfurtransferase activity. Predicted to be involved in Mo-molybdopterin cofactor biosynthetic process; protein urmylation; and tRNA wobble position uridine thiolation. Predicted to act upstream of or within tRNA processing. Predicted to be located in cytosol. Predicted to be active in cytoplasm. Orthologous to human MOCS3 (molybdenum cofactor synthesis 3).