label: tRNA (guanosine(9)-N1)-methyltransferase activity
label_lc: trna (guanosine(9)-n1)-methyltransferase activity
description: "Catalysis of the reaction: guanosine9 in tRNA + S-adenosyl-L-methionine = H+ + N1-methylguanosine9 in tRNA + S-adenosyl-L-homocysteine."