Predicted to enable glutaminyl-tRNA synthase (glutamine-hydrolyzing) activity. Predicted to be involved in glutaminyl-tRNAGln biosynthesis via transamidation and mitochondrial translation. Predicted to be part of glutamyl-tRNA(Gln) amidotransferase complex. Predicted to be active in mitochondrion. Human ortholog(s) of this gene implicated in combined oxidative phosphorylation deficiency 41. Orthologous to human GATB (glutamyl-tRNA amidotransferase subunit B). [provided by Alliance of Genome Resources, Apr 2022]