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Protein methylation and translation: Role of lysine modification on the function of yeast elongation factor 1 alpha

Proteins of the translational apparatus, including ribosomal proteins, release factors, and elongation factors, are known to be modified by a large number of methyltransferases in eukaryotic cells. The majority of these methylation reactions occurs at lysine residues. To date, 12 protein lysine methyltransferase involved in these reactions (Efm1–7; Rkm 1–5) have been identified in the yeast Saccharomyces cerevisiae. Of these 12, 5 appear to be specific to elongation factor 1 alpha (EF1A)(Efm1, Efm4–7). Each methyltransferase modifies a specific lysine residue to give mono‐, di‐, and tri‐methyllysine products. Two of these enzymes (Efm4 and Efm5) are highly conserved in nature while the others appear to be fungal specific.