View source for 1ujp


==Crystal Structure of Tryptophan Synthase A-Subunit From Thermus thermophilus HB8==
<StructureSection load='1ujp' size='340' side='right'caption='[[1ujp]], [[Resolution|resolution]] 1.34&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ujp]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UJP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UJP FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.34&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ujp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ujp OCA], [https://pdbe.org/1ujp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ujp RCSB], [https://www.ebi.ac.uk/pdbsum/1ujp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ujp ProSAT], [https://www.topsan.org/Proteins/RSGI/1ujp TOPSAN]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TRPA_THET2 TRPA_THET2] The alpha subunit is responsible for the aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate (By similarity).
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/uj/1ujp_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1ujp ConSurf].
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== Publication Abstract from PubMed ==
In order to elucidate the thermo-stabilization mechanism of the tryptophan synthase alpha-subunit from the extreme thermophile Thermus thermophilus HB8 (Tt-alpha-subunit), its crystal structure was determined and its stability was examined using DSC. The results were compared to those of other orthologs from mesophilic and hyperthermophilic organisms. The denaturation temperature of the Tt-alpha-subunit was higher than that of the alpha-subunit from S. typhimurium (St-alpha-subunit) but lower than that of the alpha-subunit from P. furiosus (Pf-alpha-subunit). Specific denaturation enthalpy and specific denaturation heat capacity values of the Tt-alpha-subunit were the lowest among the three proteins, suggesting that entropy effects are responsible for the stabilization of the Tt-alpha-subunit. Based on a structural comparison with the St-alpha-subunit, two deletions in loop regions, an increase in the number of ion pairs and a decrease in cavity volume seem to be responsible for the stabilization of the Tt-alpha-subunit. The results of structural comparison suggest that the native structure of the Tt-alpha-subunit is better adapted to an ideally stable structure than that of the St-alpha-subunit, but worse than that of the Pf-alpha-subunit. The results of calorimetry suggest that the residual structure of the Tt-alpha-subunit in the denatured state contributes to the stabilization.

Stabilization mechanism of the tryptophan synthase alpha-subunit from Thermus thermophilus HB8: X-ray crystallographic analysis and calorimetry.,Asada Y, Sawano M, Ogasahara K, Nakamura J, Ota M, Kuroishi C, Sugahara M, Yutani K, Kunishima N J Biochem. 2005 Oct;138(4):343-53. PMID:16272128<ref>PMID:16272128</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1ujp" style="background-color:#fffaf0;"></div>

==See Also==
*[[Tryptophan synthase 3D structures|Tryptophan synthase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermus thermophilus HB8]]
[[Category: Asada Y]]
[[Category: Kunishima N]]
[[Category: Kuramitsu S]]
[[Category: Miyano M]]
[[Category: Yokoyama S]]