label: N(1)-methylpseudouridine(54) in tRNA + S-adenosyl-L-homocysteine + H(+) => pseudouridine(54) in tRNA + S-adenosyl-L-methionine
label_lc: n(1)-methylpseudouridine(54) in trna + s-adenosyl-l-homocysteine + h(+) => pseudouridine(54) in trna + s-adenosyl-l-methionine