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=== Crystal structure of leucyl-tRNA synthetase and tRNA (leucine) complex ===
;Crystal structure of leucyl-tRNA synthetase and tRNA (leucine) complex


Aminoacyl-tRNA synthetases (aaRSs) are ligases which exclusively attach a particular amino acid to the 3’ of  its set of cognate tRNAs isoacceptors. It is a two-step reaction: First, an activated intermediate called aminoacyladenylate is synthesized from the amino acid and ATP. Then, the activated amino acid is transferred to the 3’-end of the tRNA. It leads to the formation of the aminoacyl-tRNA. The fidelity of protein synthesis depends of the accuracy of this reaction <ref name="Zhou">PMID:20482517</ref>.
Aminoacyl-tRNA synthetases (aaRSs) are ligases which exclusively attach a particular amino acid to the 3’ of  its set of cognate tRNAs isoacceptors. It is a two-step reaction: First, an activated intermediate called aminoacyladenylate is synthesized from the amino acid and ATP. Then, the activated amino acid is transferred to the 3’-end of the tRNA. It leads to the formation of the aminoacyl-tRNA. The fidelity of protein synthesis depends of the accuracy of this reaction <ref name="Zhou">PMID:20482517</ref>.