Predicted to enable glutaminyl-tRNA synthase (glutamine-hydrolyzing) activity. Predicted to be involved in glutaminyl-tRNAGln biosynthesis via transamidation and mitochondrial translation. Predicted to act upstream of or within translation. Located 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]