| EC |
2.1.1.203 |
| Accepted name: |
tRNA (cytosine34-C5)-methyltransferase |
| Reaction: |
S-adenosyl-L-methionine + cytosine34 in tRNA precursor = S-adenosyl-L-homocysteine + 5-methylcytosine34 in tRNA precursor |
| Other name(s): |
hTrm4 Mtase; hTrm4 methyltransferase; hTrm4 (gene name); tRNA:m5C-methyltransferase (ambiguous) |
| Systematic name: |
S-adenosyl-L-methionine:tRNA (cytosine34-C5)-methyltransferase |
| Comments: |
The human enzyme is specific for C5-methylation of cytosine34 in tRNA precursors. The intron in the human pre-tRNALeu(CAA) is indispensable for the C5-methylation of cytosine in the first position of the anticodon. It is not able to form 5-methylcytosine at positions 48 and 49 of human and yeast tRNA precursors [1]. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc |
| References: |
| 1. |
Brzezicha, B., Schmidt, M., Makalowska, I., Jarmolowski, A., Pienkowska, J. and Szweykowska-Kulinska, Z. Identification of human tRNA:m5C methyltransferase catalysing intron-dependent m5C formation in the first position of the anticodon of the pre-tRNA Leu (CAA). Nucleic Acids Res. 34 (2006) 6034–6043. [DOI] [PMID: 17071714] |
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| [EC 2.1.1.203 created 1976 as EC 2.1.1.29, part transferred 2011 to EC 2.1.1.203] |
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