View source for 9jsq


==The mutant structure of Dihydroxyacid dehydratase (DHAD)-I177F==
<StructureSection load='9jsq' size='340' side='right'caption='[[9jsq]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9jsq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9JSQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9JSQ 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]] 2.45&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</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=9jsq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9jsq OCA], [https://pdbe.org/9jsq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9jsq RCSB], [https://www.ebi.ac.uk/pdbsum/9jsq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9jsq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ILVD_ARATH ILVD_ARATH] Catalyzes the dehydration of 2,3-dihydroxy-3-isovalerate or 2,3-dihydroxy-3-methylvalerate to the 2-oxo acids 3-methyl-2-oxobutanoate (3MOB) or 3-methyl-2-oxopentanoate (3MOP).<ref>PMID:12242394</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Dihydroxy acid dehydratase (DHAD) is the third enzyme in the plant branched-chain amino acid biosynthetic pathway and the target for commercial herbicide development. We have previously reported the discovery of fungal natural product aspterric acid (AA) as a submicromolar inhibitor of DHAD through self-resistance gene directed genome mining. Here, we reveal the mechanism of AA inhibition on DHAD and the self-resistance mechanism of AstD, which is encoded by the self-resistance gene astD. As a competitive inhibitor, the hydroxycarboxylic acid group of AA mimics the binding of the natural substrate of DHAD, while the hydrophobic moiety of AA occupies the substrate entrance cavity. Compared to DHAD, AstD has a relatively narrow substrate channel to prevent AA from binding. Several mutants of DHAD were generated and assayed to validate the self-resistance mechanism and to confer Arabidopsis thaliana DHAD with AA resistance. These results will lead to the engineering of new type of herbicides targeting DHAD and provide direction for the ecological construction of herbicide-resistant crops.

Structural Bases of Dihydroxy Acid Dehydratase Inhibition and Biodesign for Self-Resistance.,Zang X, Bat-Erdene U, Huang W, Wu Z, Jacobsen SE, Tang Y, Zhou J Biodes Res. 2024 Nov 1;6:0046. doi: 10.34133/bdr.0046. eCollection 2024. PMID:39494391<ref>PMID:39494391</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9jsq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arabidopsis thaliana]]
[[Category: Large Structures]]
[[Category: Tang Y]]
[[Category: Yan Y]]
[[Category: Zang X]]
[[Category: Zhou J]]