an N(1)-methyladenosine in tRNA + S-adenosyl-L-homocysteine + H(+) => an adenosine in tRNA + S-adenosyl-L-methionine
an n(1)-methyladenosine in trna + s-adenosyl-l-homocysteine + h(+) => an adenosine in trna + s-adenosyl-l-methionine