Biology:tRNA (guanine-N7-)-methyltransferase
| tRNA (guanine-N7-)-methyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.1.1.33 | ||||||||
| CAS number | 37257-00-4 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
In enzymology, a tRNA (guanine-N7-)-methyltransferase (EC 2.1.1.33) is an enzyme that catalyzes the chemical reaction
- S-adenosyl-L-methionine + tRNA [math]\displaystyle{ \rightleftharpoons }[/math] S-adenosyl-L-homocysteine + tRNA containing N7-methylguanine
Thus, the two substrates of this enzyme are S-adenosyl methionine and tRNA, whereas its two products are S-adenosylhomocysteine and tRNA containing N7-methylguanine.
This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:tRNA (guanine-N7-)-methyltransferase. Other names in common use include transfer ribonucleate guanine 7-methyltransferase, 7-methylguanine transfer ribonucleate methylase, tRNA guanine 7-methyltransferase, N7-methylguanine methylase, and S-adenosyl-L-methionine:tRNA (guanine-7-N-)-methyltransferase.
Structural studies
As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes 1YZH and 2FCA.
References
- "The Enzymatic Methylation of Ribonucleic Acid and Deoxyribonucleic Acid. 3. Purification of Soluble Ribonucleic Acid-Methylating Enzymes". J. Biol. Chem. 239: 3462–3473. 1964. PMID 14245404.
- "Studies on microbial RNA. Fractionation of tRNA methylases from Saccharomyces cerevisiae". Eur. J. Biochem. 9 (2): 207–215. 1969. doi:10.1111/j.1432-1033.1969.tb00596.x. PMID 4896260.
- "7-Methylguanine specific tRNA-methyltransferase from Escherichia coli". Nucleic Acids Res. 3 (11): 3109–22. 1976. doi:10.1093/nar/3.11.3109. PMID 794833.
- Natural Sulfur Compounds. New York: Plenum Press. 1980. pp. 25.
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