Predicted to enable tRNA (guanine(46)-N7)-methyltransferase activity. Predicted to be involved in tRNA (guanine-N7)-methylation. Predicted to act upstream of or within methylation and tRNA processing. Predicted to be located in nucleus. Predicted to be part of tRNA (m7G46) methyltransferase complex. Orthologous to human METTL1 (methyltransferase 1, tRNA methylguanosine).