Acyltransferase which transfers an acyl group to the N-terminus of glutamine. Can use phenylacetyl-CoA as an acyl donor. an acyl-CoA + L-glutamine = an N(2)-acyl-L-glutamine + CoA + H(+) Expressed in liver and kidney and, at lower levels, in pancreas, testis, ovary and stomach. Belongs to the glycine N-acyltransferase family.