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{{STRUCTURE_1sg6|  PDB=1sg6  |  SCENE=  }}
==Crystal structure of Aspergillus nidulans 3-dehydroquinate synthase (AnDHQS) in complex with Zn2+ and NAD+, at 1.7D==
===Crystal structure of Aspergillus nidulans 3-dehydroquinate synthase (AnDHQS) in complex with Zn2+ and NAD+, at 1.7D===
<StructureSection load='1sg6' size='340' side='right' caption='[[1sg6]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
{{ABSTRACT_PUBMED_15103156}}
== Structural highlights ==
<table><tr><td colspan='2'>[[1sg6]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Emericella_nidulans Emericella nidulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SG6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1SG6 FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene><br>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1nrx|1nrx]], [[1nve|1nve]], [[1nvd|1nvd]], [[1nvb|1nvb]], [[1nua|1nua]], [[1nva|1nva]], [[1nvf|1nvf]], [[1nr5|1nr5]]</td></tr>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">AROMA, AROM ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=162425 Emericella nidulans])</td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/3-dehydroquinate_synthase 3-dehydroquinate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.3.4 4.2.3.4] </span></td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1sg6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sg6 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1sg6 RCSB], [http://www.ebi.ac.uk/pdbsum/1sg6 PDBsum]</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/sg/1sg6_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Crystallization of Aspergillus nidulans 3-dehydroquinate synthase (DHQS), following turnover of the enzyme by addition of the substrate DAHP, gave a new crystal form (form J). Although the crystals have dimensions of only 50 x 20 x 5 micro m, they are well ordered, diffracting to 1.7 A. The space group is C222(1), with unit-cell parameters a = 90.0, b = 103.7, c = 177.4 A. Structure determination and refinement to R = 0.19 (R(free) = 0.25) shows the DHQS is in the 'open' form with the substrate site unoccupied but with some loop regions perturbed. Previous crystals of open-form DHQS only diffracted to 2.5 A resolution. The use of enzyme turnover may be applicable in other systems in attempts to improve crystal quality.


==Function==
Structure of the 'open' form of Aspergillus nidulans 3-dehydroquinate synthase at 1.7 A resolution from crystals grown following enzyme turnover.,Nichols CE, Hawkins AR, Stammers DK Acta Crystallogr D Biol Crystallogr. 2004 May;60(Pt 5):971-3. Epub 2004, Apr 21. PMID:15103156<ref>PMID:15103156</ref>
[[http://www.uniprot.org/uniprot/ARO1_EMENI ARO1_EMENI]] The AROM polypeptide catalyzes 5 consecutive enzymatic reactions in prechorismate polyaromatic amino acid biosynthesis.[HAMAP-Rule:MF_03143]


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[1sg6]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Emericella_nidulans Emericella nidulans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SG6 OCA].
</div>
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:015103156</ref><references group="xtra"/><references/>
__TOC__
</StructureSection>
[[Category: 3-dehydroquinate synthase]]
[[Category: 3-dehydroquinate synthase]]
[[Category: Emericella nidulans]]
[[Category: Emericella nidulans]]

Revision as of 11:04, 3 October 2014

Crystal structure of Aspergillus nidulans 3-dehydroquinate synthase (AnDHQS) in complex with Zn2+ and NAD+, at 1.7D

1sg6, resolution 1.70Å

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