label: 5-methyluridine(54) in tRNA + hydrogen sulfide + ATP = 5-methyl-2-thiouridine(54) in tRNA + AMP + diphosphate
label_lc: 5-methyluridine(54) in trna + hydrogen sulfide + atp = 5-methyl-2-thiouridine(54) in trna + amp + diphosphate