glutamyl-tRNA synthetase, archaeal and eukaryotic family
The glutamyl-tRNA synthetases of the eukaryotic cytosol and of the Archaea are more similar to glutaminyl-tRNA synthetases than to bacterial glutamyl-tRNA synthetases. This model models just the eukaryotic cytosolic and archaeal forms of the enzyme. In some eukaryotes, the glutamyl-tRNA synthetase is part of a longer, multifunctional aminoacyl-tRNA ligase. In many species, the charging of tRNA(gln) proceeds first through misacylation with Glu and then transamidation. For this reason, glutamyl-tRNA synthetases, including all known archaeal enzymes (as of 2010) may act on both tRNA(gln) and tRNA(glu). [Protein synthesis, tRNA aminoacylation]
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