>TIGR00262 trpA tryptophan synthase, alpha subunit; InterPro: IPR002028 Tryptophan synthase (4.2.1.20 from EC) catalyzes the last step in the biosynthesis of tryptophan , : L-serine + 1-(indol-3-yl)glycerol 3-phosphate = L-tryptophan + glyceraldehyde 3-phosphate + H_2O It has two functional domains, each found in bacteria and plants on a separate subunit. In Escherichia coli, the 2 subunits, A and B, are encoded by the trpA and trpB genes respectively. The alpha chain is for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate and the beta chain IPR006653 from INTERPRO is for the synthesis of tryptophan from indole and serine. In fungi the two domains are fused together in a single multifunctional protein, in the order: (NH2-A-B-COOH) , . The two domains of the Neurospora crassa polypeptide are linked by a connector of 54-amino acid residues that has less than 25 0dentity to the 45-residue connector of the Saccharomyces cerevisiae polypeptide. Two acidic residues are believed to serve as proton donors/acceptors in the enzyme's catalytic mechanism. ; GO: 0004834 tryptophan synthase activity, 0006568 tryptophan metabolic process.

Probab=95.55 E-value=0.16 Score=30.10 Aligned_cols=185 Identities=19% Similarity=0.277 Sum_probs=126.3 Q ss_pred CHHHHHHHHHHHHHCCCCEEEEEEE------CCEECCCCCC-----------CHHHHHHHHHC-CCCEEEEEEEE----- Q ss_conf 8899999999999659989999734------2634584341-----------78999986412-56416856788----- Q gi|254780975|r 15 DFSRLGEEISNITKAGAKQIHFDVM------DGCFVPNISF-----------GADVIRSLRSY-SDSVFDCHLMI----- 71 (224) Q Consensus 15 d~~~l~~~i~~l~~~~~d~iHiDIm------Dg~fvpn~~~-----------~~~~i~~i~~~-t~~~~dvHLMv----- 71 (224) T Consensus 22 ~~~~~~~~~~~~~~~g~~~~~~g~p~~dp~~dg~~~~~~~~~~~~~g~~~~~~~~~~~~~~~~~~~~p~~~~~~~~~~~~ 101 (262) T TIGR00262 22 DLETSLEILKTLVEAGADALELGVPFSDPLADGPTIQAADLRALRAGVNPEKAFELLKKVREKGPNIPIGLLTYYNLIFR 101 (262) T ss_pred CHHHHHHHHHHHHHCCCCHHHHCCCCCCCCCCCCHHHHHHHHHHHHCCCHHHHHHHHHHHHHHCCCCCHHHHHHHHHHHH T ss_conf 25578999999986175100004642231124402335667887613537889999998874034341367777767875 Q ss_pred EECCHHHHHHCCCCCCEEEEECCCCCCHHHHHHHHHHCCCEEEEEEECCCCHHHHHHHHHHCC-EEEEEEEECCCCCCC- Q ss_conf 512033676404776079997066421589998677649825998523334478998862014-028998306776533- Q gi|254780975|r 72 SSIDSHINIIADAGCDIITFHPESSPHIRRSLRTIHAMGKKTGVAINPETPVAILEDVIDEID-MILIMTVNPGFGGQQ- 149 (224) Q Consensus 72 ~~P~~~i~~~~~~g~d~i~~H~E~~~~~~~~i~~i~~~g~k~Giai~p~T~~~~i~~~l~~~D-~vliM~V~PG~~Gq~- 149 (224) T Consensus 102 ~g~~~~~~~~~~~g~~~~~~~d~p~~~~~~~~~~~~~~~~~~~~~~~p~~~~~~~~~~~~~~~g~~y~~~-~~g~~g~~~ 180 (262) T TIGR00262 102 LGVDEFYAKAKEAGVDGLLVPDLPLEEAGDLLEAAKKHGVDPIFLVAPTTPDERLKAIAEKSEGFVYLVS-VTGVTGARN 180 (262) T ss_pred HHHHHHHHHHHHCCCCCEEECCCCCHHHHHHHHHHHHCCCCEEEEECCCCCHHHHHHHHHHHCCCEEEEE-CCCCCCHHH T ss_conf 0368999998861654022024660113578888876076336875488877788988875067133310-014310145 Q ss_pred -CCCHHHHHHHHHHHHHHCCCCEEEEECC-CCHHHHHHHHHCCCCEEEECHHHHCC Q ss_conf -2201357789986543138652698158-99889999996799899974266378 Q gi|254780975|r 150 -LIESTIPKIRQAKALIGKRSISLEVDGG-VTSRNIKSLVQAGADLLVVGSSFFNQ 203 (224) Q Consensus 150 -f~~~~l~kI~~l~~~~~~~~~~I~vDGG-vn~~~i~~l~~~Gad~~V~Gsaif~~ 203 (224) T Consensus 181 ~~~~~~~~~~~~~~~~~~---~p~~~g~g~~~~~~~~~~~~~g~~g~~~g~~~~~~ 233 (262) T TIGR00262 181 RVESALEELLKRLKALSA---KPVLVGFGISKPEHVKELKDAGADGVIVGSALVKI 233 (262) T ss_pred HHHHHHHHHHHHHHHCCC---CCCHHCCCCCCHHHHHHHHHCCCCCCHHHHHHHHH T ss_conf 544568999998762044---43100146665688999874044530024789998

HHsearch alignment for GI: 254780975 and conserved domain: TIGR00262