. "\"Catalysis of the reaction: S-adenosyl-L-methionine + tRNA = S-adenosyl-L-homocysteine + tRNA containing N1-methylguanine.\" [EC:2.1.1.31]" . . "tRNA (guanine-N1-)-methyltransferase activity" . "S-adenosyl-L-methionine:tRNA (guanine-1-N-)-methyltransferase activity" . "S-adenosyl-L-methionine:tRNA (guanine-N1-)-methyltransferase activity" . "transfer ribonucleate guanine 1-methyltransferase activity" . "tRNA guanine 1-methyltransferase activity" . "EC:2.1.1.-" . .