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2j9x

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{{Seed}}
 
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[[Image:2j9x.png|left|200px]]
 
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==Tryptophan Synthase in complex with GP, alpha-D,L-glycerol-phosphate, Cs, pH6.5 - alpha aminoacrylate form - (GP)E(A-A)==
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The line below this paragraph, containing "STRUCTURE_2j9x", creates the "Structure Box" on the page.
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<StructureSection load='2j9x' size='340' side='right'caption='[[2j9x]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[2j9x]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2J9X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2J9X FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CS:CESIUM+ION'>CS</scene>, <scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=G3P:SN-GLYCEROL-3-PHOSPHATE'>G3P</scene>, <scene name='pdbligand=P1T:2-[({3-HYDROXY-2-METHYL-5-[(PHOSPHONOOXY)METHYL]PYRIDIN-4-YL}METHYL)AMINO]ACRYLIC+ACID'>P1T</scene></td></tr>
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{{STRUCTURE_2j9x| PDB=2j9x | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2j9x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2j9x OCA], [https://pdbe.org/2j9x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2j9x RCSB], [https://www.ebi.ac.uk/pdbsum/2j9x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2j9x ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TRPA_SALTY TRPA_SALTY] The alpha subunit is responsible for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/j9/2j9x_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2j9x ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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In the tryptophan synthase bienzyme complex, indole produced by substrate cleavage at the alpha-site is channeled to the beta-site via a 25 A long tunnel. Within the beta-site, indole and l-Ser react with pyridoxal 5'-phosphate in a two-stage reaction to give l-Trp. In stage I, l-Ser forms an external aldimine, E(Aex1), which converts to the alpha-aminoacrylate aldimine, E(A-A). Formation of E(A-A) at the beta-site activates the alpha-site &gt;30-fold. In stage II, indole reacts with E(A-A) to give l-Trp. The binding of alpha-site ligands (ASLs) exerts strong allosteric effects on the reaction of substrates at the beta-site: the distribution of intermediates formed in stage I is shifted in favor of E(A-A), and the binding of ASLs triggers a conformational change in the beta-site to a state with an increased affinity for l-Ser. Here, we compare the behavior of new ASLs as allosteric effectors of stage I with the behavior of the natural product, d-glyceraldehyde 3-phosphate. Rapid kinetics and kinetic isotope effects show these ASLs bind with affinities ranging from micro- to millimolar, and the rate-determining step for conversion of E(Aex1) to E(A-A) is increased by 8-10-fold. To derive a structure-based mechanism for stage I, X-ray structures of both the E(Aex1) and E(A-A) states complexed with the different ASLs were determined and compared with structures of the ASL complexes with the internal aldimine [Ngo, H., Harris, R., Kimmich, N., Casino, P., Niks, D., Blumenstein, L., Barends, T. R., Kulik, V., Weyand, M., Schlichting, I., and Dunn, M. F. (2007) Biochemistry 46, 7713-7727].
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===TRYPTOPHAN SYNTHASE IN COMPLEX WITH GP, ALPHA-D,L-GLYCEROL-PHOSPHATE, CS, PH6.5- ALPHA AMINOACRYLATE FORM- (GP)E(A-A)===
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Allosteric regulation of substrate channeling in tryptophan synthase: modulation of the L-serine reaction in stage I of the beta-reaction by alpha-site ligands.,Ngo H, Kimmich N, Harris R, Niks D, Blumenstein L, Kulik V, Barends TR, Schlichting I, Dunn MF Biochemistry. 2007 Jul 3;46(26):7740-53. Epub 2007 Jun 9. PMID:17559232<ref>PMID:17559232</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 2j9x" style="background-color:#fffaf0;"></div>
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==About this Structure==
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==See Also==
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2J9X is a 2 chains structure of sequences from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2J9X OCA].
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*[[Tryptophan synthase 3D structures|Tryptophan synthase 3D structures]]
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[[Category: Salmonella typhimurium]]
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== References ==
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[[Category: Tryptophan synthase]]
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<references/>
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[[Category: Barends, T R.]]
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__TOC__
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[[Category: Blumenstein, L.]]
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</StructureSection>
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[[Category: Dunn, M F.]]
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[[Category: Large Structures]]
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[[Category: Harris, R.]]
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[[Category: Salmonella enterica subsp. enterica serovar Typhimurium]]
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[[Category: Kimmich, N.]]
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[[Category: Barends TR]]
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[[Category: Kulik, V.]]
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[[Category: Blumenstein L]]
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[[Category: Ngo, H.]]
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[[Category: Dunn MF]]
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[[Category: Niks, D.]]
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[[Category: Harris R]]
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[[Category: Schlichting, I.]]
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[[Category: Kimmich N]]
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[[Category: Allosteric enzyme]]
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[[Category: Kulik V]]
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[[Category: Amino-acid biosynthesis]]
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[[Category: Ngo H]]
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[[Category: Aromatic amino acid biosynthesis]]
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[[Category: Niks D]]
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[[Category: Crbon- oxygen lyase]]
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[[Category: Schlichting I]]
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[[Category: Lyase]]
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[[Category: Pyridoxal phosphate]]
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[[Category: Synthase]]
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[[Category: Tryptophan biosynthesis]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Feb 17 05:57:00 2009''
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Current revision

Tryptophan Synthase in complex with GP, alpha-D,L-glycerol-phosphate, Cs, pH6.5 - alpha aminoacrylate form - (GP)E(A-A)

PDB ID 2j9x

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