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Your query returned 1 entry. 
Printable version
| EC | 2.1.1.202 | ||||||||
| Accepted name: | multisite-specific tRNA:(cytosine-C5)-methyltransferase | ||||||||
| Reaction: | (1) S-adenosyl-L-methionine + cytosine34 in tRNA precursor = S-adenosyl-L-homocysteine + 5-methylcytosine34 in tRNA precursor (2) S-adenosyl-L-methionine + cytosine40 in tRNA precursor = S-adenosyl-L-homocysteine + 5-methylcytosine40 in tRNA precursor (3) S-adenosyl-L-methionine + cytosine48 in tRNA = S-adenosyl-L-homocysteine + 5-methylcytosine48 in tRNA (4) S-adenosyl-L-methionine + cytosine49 in tRNA = S-adenosyl-L-homocysteine + 5-methylcytosine49 in tRNA |
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| Other name(s): | multisite-specific tRNA:m5C-methyltransferase; TRM4 (gene name, gene corresponding to ORF YBL024w) | ||||||||
| Systematic name: | S-adenosyl-L-methionine:tRNA (cytosine-C5)-methyltransferase | ||||||||
| Comments: | The enzyme from Saccharomyces cerevisiae is responsible for complete 5-methylcytosine methylations of yeast tRNA. The incidence of modification depends on the cytosine position in tRNA. At positions 34 and 40, 5-methylcytosine is found only in two yeast tRNAs (tRNALeu(CUA) and tRNAPhe(GAA), respectively), whereas most other elongator yeast tRNAs bear either 5-methylcytosine48 or 5-methylcytosine49, but never both in the same tRNA molecule [1]. The formation of 5-methylcytosine34 and 5-methylcytosine40 is a strictly intron-dependent process, whereas the formation of 5-methylcytosine48 and 5-methylcytosine49 is an intron-independent process [2,3]. | ||||||||
| Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||||||||
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