A heterotetrameric enzyme complex made up of two components I and two components II. Catalyzes the formation of anthranilate, pyruvate and L-glutamate from chorismate and L-glutamine. [ http://biocyc.org/META/NEW-IMAGE?type=NIL&object=ANTHRANSYN-CPLX https://enzyme.expasy.org/EC/4.1.3.27 http://www.ncbi.nlm.nih.gov/pubmed/4886290 ]