uridine(341) in tmRNA + S-adenosyl-L-methionine = 5-methyluridine(341) in tmRNA + S-adenosyl-L-homocysteine + H(+)
uridine(341) in tmrna + s-adenosyl-l-methionine = 5-methyluridine(341) in tmrna + s-adenosyl-l-homocysteine + h(+)
uridine(341) in tmRNA + S-adenosyl-L-methionine = 5-methyluridine(341) in tmRNA + S-adenosyl-L-homocysteine + H(+)
uridine(341) in tmrna + s-adenosyl-l-methionine = 5-methyluridine(341) in tmrna + s-adenosyl-l-homocysteine + h(+)