5kts: Difference between revisions
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New page: '''Unreleased structure''' The entry 5kts is ON HOLD Authors: Description: Category: Unreleased Structures |
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==Crystal structure of Pyrococcus horikoshii quinolinate synthase (NadA) with bound citraconate and Fe4S4 cluster== | |||
<StructureSection load='5kts' size='340' side='right'caption='[[5kts]], [[Resolution|resolution]] 1.34Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5kts]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_horikoshii_OT3 Pyrococcus horikoshii OT3]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5KTS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5KTS 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]] 1.34Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIZ:(~{Z})-2-METHYLBUT-2-ENEDIOIC+ACID'>CIZ</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NH4:AMMONIUM+ION'>NH4</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=5kts FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5kts OCA], [https://pdbe.org/5kts PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5kts RCSB], [https://www.ebi.ac.uk/pdbsum/5kts PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5kts ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/NADA_PYRHO NADA_PYRHO] Catalyzes the condensation of iminoaspartate with dihydroxyacetone phosphate to form quinolinate (By similarity). | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The quinolinate synthase of prokaryotes and photosynthetic eukaryotes, NadA, contains a [4Fe-4S] cluster with unknown function. We report crystal structures of Pyrococcus horikoshii NadA in complex with dihydroxyacetone phosphate (DHAP), iminoaspartate analogues, and quinolinate. DHAP adopts a nearly planar conformation and chelates the [4Fe-4S] cluster via its keto and hydroxyl groups. The active site architecture suggests that the cluster acts as a Lewis acid in enediolate formation, like zinc in class II aldolases. The DHAP and putative iminoaspartate structures suggest a model for a condensed intermediate. The ensemble of structures suggests a two-state system, which may be exploited in early steps. | |||
Crystal Structures of the Iron-Sulfur Cluster-Dependent Quinolinate Synthase in Complex with Dihydroxyacetone Phosphate, Iminoaspartate Analogues, and Quinolinate.,Fenwick MK, Ealick SE Biochemistry. 2016 Jul 22. PMID:27404889<ref>PMID:27404889</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 5kts" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Pyrococcus horikoshii OT3]] | |||
[[Category: Ealick SE]] | |||
[[Category: Fenwick MK]] | |||
Latest revision as of 12:28, 13 August 2026
Crystal structure of Pyrococcus horikoshii quinolinate synthase (NadA) with bound citraconate and Fe4S4 cluster
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