The function of GATC (glutamyl-tRNA amidotransferase subunit C, Ensembl gene identifier ENSG00000257218) is as follows. Allows the formation of correctly charged Gln-tRNA(Gln) through the transamidation of misacylated Glu-tRNA(Gln) in the mitochondria. The reaction takes place in the presence of glutamine and ATP through an activated gamma-phospho-Glu-tRNA(Gln). .