2.1.1.225 additional information Trm13p belongs to the RFM superfamily of MTases despite the absence of a significant sequence similarity to previously characterized members of this superfamily. The model reveals residues potentially responsible for cofactor binding, tRNA binding, and catalysis of the 2'-O-methylation reaction. The model suggests a presence of one to three disulfide bonds and/or metal ion binding site next to the substrate binding pocket Saccharomyces cerevisiae ? 89 2.1.1.225 S-adenosyl-L-methionine + adenosine4 in tRNAHis - Saccharomyces cerevisiae S-adenosyl-L-homocysteine + 2'-O-methyladenosine4 in tRNAHis 413581 2.1.1.225 S-adenosyl-L-methionine + adenosine4 in tRNAHis the enzyme is necessary and sufficient for 2'-O-methylation at position 4 of yeast tRNA. 2'-O-methylation in the acceptor stem of tRNA Saccharomyces cerevisiae S-adenosyl-L-homocysteine + 2'-O-methyladenosine4 in tRNAHis 413581 2.1.1.225 S-adenosyl-L-methionine + cytidine4 in tRNAGly(GCC) - Saccharomyces cerevisiae S-adenosyl-L-homocysteine + 2'-O-methylcytidine4 in tRNAGly(GCC) 413585 2.1.1.225 S-adenosyl-L-methionine + cytidine4 in tRNAGly(GCC) the enzyme is necessary and sufficient for 2'-O-methylation at position 4 of yeast tRNA. 2'-O-methylation in the acceptor stem of tRNA Saccharomyces cerevisiae S-adenosyl-L-homocysteine + 2'-O-methylcytidine4 in tRNAGly(GCC) 413585 2.1.1.225 S-adenosyl-L-methionine + cytidine4 in tRNAPro - Saccharomyces cerevisiae S-adenosyl-L-homocysteine + 2'-O-methylcytidine4 in tRNAPro 413586 2.1.1.225 S-adenosyl-L-methionine + cytidine4 in tRNAPro the enzyme is necessary and sufficient for 2'-O-methylation at position 4 of yeast tRNA. 2'-O-methylation in the acceptor stem of tRNA Saccharomyces cerevisiae S-adenosyl-L-homocysteine + 2'-O-methylcytidine4 in tRNAPro 413586