The GTPBP3-MTO1 complex catalyzes the 5-taurinomethyluridine modification wobble position U34 mitochondrial tRNAs. CG18528 is orthologous to Human GTPBP3 with a DIOPT score of 14/14 (identity 43%, similarity 60%) CG4610 is orthologous to Human MTO1 with a DIOPT score of 14/14 (identity 52%, similarity 69%)