Tags: Enzyme.
TRNA (cytosine34-C5)-methyltransferase (EC 2.1.1.203 hTrm4 Mtase hTrm4 methyltransferase hTrm4 (gene) tRNA:m5C-methyltransferase) is an enzyme with system name S-adenosyl-L-methionine:tRNA (cytosine34-C5)-methyltransferase. This enzyme catalyses the following chemical reaction S-adenosyl-L-methionine + cytosine34 in tRNA precursor S-adenosyl-L-homocysteine + 5-methylcytosine34 in tRNA precursorThe human enzyme is specific for C5-methylation of cytosine34 in tRNA precursors.