The Enzyme Database

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EC 2.1.1.218     
Accepted name: tRNA (adenine9-N1)-methyltransferase
Reaction: S-adenosyl-L-methionine + adenine9 in tRNA = S-adenosyl-L-homocysteine + N1-methyladenine9 in tRNA
Other name(s): Trm10p (ambiguous); tRNA(m1G9/m1A9)-methyltransferase; tRNA(m1G9/m1A9)MTase; TK0422p (gene name); tRNA m1A9-methyltransferase; tRNA m1A9 Mtase
Systematic name: S-adenosyl-L-methionine:tRNA (adenine9-N1)-methyltransferase
Comments: The enzyme from Sulfolobus acidocaldarius specifically methylates adenine9 in tRNA [1]. The bifunctional enzyme from Thermococcus kodakaraensis also catalyses the methylation of guanine9 in tRNA (cf. EC 2.1.1.221, tRNA (guanine9-N1)-methyltransferase).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Kempenaers, M., Roovers, M., Oudjama, Y., Tkaczuk, K.L., Bujnicki, J.M. and Droogmans, L. New archaeal methyltransferases forming 1-methyladenosine or 1-methyladenosine and 1-methylguanosine at position 9 of tRNA. Nucleic Acids Res. 38 (2010) 6533–6543. [PMID: 20525789]
[EC 2.1.1.218 created 2011 (EC 2.1.1.36 created 1972, part transferred 2011 to EC 2.1.1.218)]
 
 


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