cd00331

Indole-3-glycerol phosphate synthase (IGPS); an enzyme in the tryptophan biosynthetic pathway, catalyzing the ring closure reaction of 1-(o-carboxyphenylamino)-1-deoxyribulose-5-phosphate (CdRP) to indole-3-glycerol phosphate (IGP), accompanied by the release of carbon dioxide and water. IGPS is active as a separate monomer in most organisms, but is also found fused to other enzymes as part of a bifunctional or multifunctional enzyme involved in tryptophan biosynthesis.