Tryptophan synthase subunit alpha; The alpha subunit is responsible for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate. Belongs to the TrpA family.

N-(5'-phosphoribosyl)anthranilate isomerase; Catalyzes the formation of 1-(2-carboxyphenylamino)-1-deoxy-D-ribulose 5-phosphate from N-(5-phospho-beta-D-ribosyl)-anthranilate in tryptophan biosynthesis; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the TrpF family.

Anthranilate synthase; TrpG; with TrpE catalyzes the formation of anthranilate and glutamate from chorismate and glutamine; TrpG provides the glutamine amidotransferase activity; Derived by automated computational analysis using gene prediction method: Protein Homology.

Anthranilate phosphoribosyltransferase; Catalyzes the transfer of the phosphoribosyl group of 5- phosphorylribose-1-pyrophosphate (PRPP) to anthranilate to yield N-(5'- phosphoribosyl)-anthranilate (PRA).

Anthranilate synthase; Part of a heterotetrameric complex that catalyzes the two- step biosynthesis of anthranilate, an intermediate in the biosynthesis of L-tryptophan. In the first step, the glutamine-binding beta subunit (TrpG) of anthranilate synthase (AS) provides the glutamine amidotransferase activity which generates ammonia as a substrate that, along with chorismate, is used in the second step, catalyzed by the large alpha subunit of AS (TrpE) to produce anthranilate. In the absence of TrpG, TrpE can synthesize anthranilate directly from chorismate and high concentrations of ammonia.

Para-aminobenzoate synthase component 1; catalyzes the formation of 4-amino-4-deoxychorismate from chorismate and L-glutamine; Derived by automated computational analysis using gene prediction method: Protein Homology.

Threonine dehydratase; Catalyzes the anaerobic formation of alpha-ketobutyrate and ammonia from threonine in a two-step reaction. The first step involved a dehydration of threonine and a production of enamine intermediates (aminocrotonate), which tautomerizes to its imine form (iminobutyrate). Both intermediates are unstable and short-lived. The second step is the nonenzymatic hydrolysis of the enamine/imine intermediates to form 2- ketobutyrate and free ammonia. In the low water environment of the cell, the second step is accelerated by RidA.

Hydroxyectoine utilization dehydratase EutB; Catalyzes the formation of 2-oxobutanoate from L-threonine; involved in ectoine utilization; Derived by automated computational analysis using gene prediction method: Protein Homology.