Tags: Protein.
Glutaminyl-tRNA synthetase is an enzyme that in humans is encoded by the QARS gene.Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs aminoacyl-tRNA synthetases are thought to be among the first proteins that appeared in evolution.