"Trm7p catalyses the formation of two 2'-O-methylriboses in yeast tRNA anticodon loop."

Pintard L, Lecointe F, Bujnicki JM, Bonnerot C, Grosjean H, Lapeyre B



Published 2002-04-02 in EMBO J volume 21 .

Pubmed ID: 11927565
DOI identifier: -

Abstract:
The genome of Saccharomyces cerevisiae encodes three close homologues of the Escherichia coli 2'-O-rRNA methyltransferase FtsJ/RrmJ, designated Trm7p, Spb1p and Mrm2p. We present evidence that Trm7p methylates the 2'-O-ribose of nucleotides at positions 32 and 34 of the tRNA anticodon loop, both in vivo and in vitro. In a trm7Delta strain, which is viable but grows slowly, translation is impaired, thus indicating that these tRNA modifications could be important for translation efficiency. We discuss the emergence of a family of three 2'-O-RNA methyltransferases in Eukaryota and one in Prokaryota from a common ancestor. We propose that each eukaryotic enzyme is located in a different cell compartment, in which it would methylate a different RNA that can adopt a very similar secondary structure.


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Last modification of this entry: Sept. 6, 2012