Specifically methylates guanosine-37 in various tRNAs (By similarity). TRMD_BIFLS MKIDIVSVFPEYFEVMNLSLMGKAQAKGLLEIKAHNLRDWTHDVHHSVDDTPVGGGAGMVMKPEVWSECLDELLGFSRPSDSSAPSGTPVLIFPNPSAPLFTQRDATELSHADHLLFGCGRYEGYDARIPDYYRSQGVDVREYSIGDYVLNGGEVAVSVMLEAITRLMPGFMGNPDSIVEESYTGEGALLEHRQYTKPAVWRGIAVPDVLLSGDHGKVDRFRRDEALARTAEIRPDLIAALDCKALDKADRKTLMALGWEVSAAHPRRLAD tRNA [GM37] methyltransferase 271 tRNA (guanine-N(1)-)-methyltransferase Blon_0350 trmD M1G-methyltransferase BLIJ_0357