View source for 1gqn


==Native 3-dehydroquinase from Salmonella typhi==
<StructureSection load='1gqn' size='340' side='right'caption='[[1gqn]], [[Resolution|resolution]] 1.78&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1gqn]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GQN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GQN FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1l9w|1l9w]], [[1qfe|1qfe]]</div></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/3-dehydroquinate_dehydratase 3-dehydroquinate dehydratase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.10 4.2.1.10] </span></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=1gqn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gqn OCA], [https://pdbe.org/1gqn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gqn RCSB], [https://www.ebi.ac.uk/pdbsum/1gqn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gqn ProSAT]</span></td></tr>
</table>
== 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/gq/1gqn_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=1gqn ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The type I 3-dehydroquinate dehydratase (DHQase) which catalyses the reversible dehydration of 3-dehydroquinic acid to 3-dehydroshikimic acid is involved in the shikimate pathway for the biosynthesis of aromatic compounds. The shikimate pathway is absent in mammals, which makes structural information about DHQase vital for the rational design of antimicrobial drugs and herbicides. The crystallographic structure of the type I DHQase from Salmonella typhi has now been determined for the native form at 1.78 A resolution (R = 19.9%; R(free) = 24.7%). The structure of the modified enzyme to which the product has been covalently bound has also been determined but in a different crystal form (2.1 A resolution; R = 17.7%; R(free) = 24.5%). An analysis of the three available crystal forms has provided information about the physiological dimer interface. The enzyme relies upon the closure of a lid-like loop to complete its active site. As the lid-loop tends to stay in the closed position, dimerization appears to play a role in biasing the arrangement of the loop towards its open position, thus facilitating substrate access.

Comparison of different crystal forms of 3-dehydroquinase from Salmonella typhi and its implication for the enzyme activity.,Lee WH, Perles LA, Nagem RA, Shrive AK, Hawkins A, Sawyer L, Polikarpov I Acta Crystallogr D Biol Crystallogr. 2002 May;58(Pt 5):798-804. Epub 2002, Apr 26. PMID:11976491<ref>PMID:11976491</ref>

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

==See Also==
*[[Dehydroquinase 3D structures|Dehydroquinase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: 3-dehydroquinate dehydratase]]
[[Category: Large Structures]]
[[Category: Lee, W H]]
[[Category: Nagem, R A.P]]
[[Category: Perles, L A]]
[[Category: Polikarpov, I]]
[[Category: Sawyer, L]]
[[Category: A/b barrel]]
[[Category: Lyase]]
[[Category: Shikimate pathway]]