6f48: Difference between revisions
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==Structure of quinolinate synthase with reaction intermediates X and Y== | |||
<StructureSection load='6f48' size='340' side='right' caption='[[6f48]], [[Resolution|resolution]] 1.50Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6f48]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6F48 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6F48 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=XQB:2-imino,3-carboxy,5-hydroxy,6-oxo+hexanoic+acid'>XQB</scene>, <scene name='pdbligand=YQA:5-hydroxy,-4,5-dihydroquinolinate'>YQA</scene></td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Quinolinate_synthase Quinolinate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.72 2.5.1.72] </span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6f48 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6f48 OCA], [http://pdbe.org/6f48 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6f48 RCSB], [http://www.ebi.ac.uk/pdbsum/6f48 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6f48 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/NADA_THEMA NADA_THEMA]] Catalyzes the condensation of iminoaspartate with dihydroxyacetone phosphate to form quinolinate (By similarity). | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
NadA is a multifunctional enzyme that condenses dihydroxyacetone phosphate (DHAP) with iminoaspartate (IA) to generate quinolinic acid (QA), the universal precursor of the nicotinamide adenine dinucleotide (NAD(P)) cofactor. Using X-ray crystallography, we have (i) characterized two of the reaction intermediates of QA synthesis using a "pH-shift" approach and a slowly reacting Thermotoga maritima NadA variant and (ii) observed the QA product, resulting from the degradation of an intermediate analogue, bound close to the entrance of a long tunnel leading to the solvent medium. We have also used molecular docking to propose a condensation mechanism between DHAP and IA based on two previously published Pyrococcus horikoshi NadA structures. The combination of reported data and our new results provide a structure-based complete catalytic sequence of QA synthesis by NadA. | |||
Crystallographic Trapping of Reaction Intermediates in Quinolinic Acid Synthesis by NadA.,Volbeda A, Saez Cabodevilla J, Darnault C, Gigarel O, Han TH, Renoux O, Hamelin O, Ollagnier-de-Choudens S, Amara P, Fontecilla-Camps JC ACS Chem Biol. 2018 Apr 19. doi: 10.1021/acschembio.7b01104. PMID:29641168<ref>PMID:29641168</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6f48" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Quinolinate synthase]] | |||
[[Category: Fontecilla-Camps, J C]] | |||
[[Category: Volbeda, A]] | [[Category: Volbeda, A]] | ||
[[Category: | [[Category: Iron sulfur cluster]] | ||
[[Category: Nad biosynthesis]] | |||
[[Category: Transferase]] | |||