View source for 6deq


==Crystal structure of Candida albicans acetohydroxyacid synthase in complex with the herbicide penoxsulam==
<StructureSection load='6deq' size='340' side='right'caption='[[6deq]], [[Resolution|resolution]] 2.13&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6deq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Candida_albicans_SC5314 Candida albicans SC5314]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DEQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6DEQ 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]] 2.127&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PXD:2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzenesulfonamide'>PXD</scene>, <scene name='pdbligand=TP9:(3Z)-4-{[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]AMINO}-3-MERCAPTOPENT-3-EN-1-YL+TRIHYDROGEN+DIPHOSPHATE'>TP9</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=6deq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6deq OCA], [https://pdbe.org/6deq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6deq RCSB], [https://www.ebi.ac.uk/pdbsum/6deq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6deq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A1D8PJF9_CANAL A0A1D8PJF9_CANAL] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The increased prevalence of drug-resistant human pathogenic fungal diseases poses a major threat to global human health. Thus, new drugs are urgently required to combat these infections. Here, we demonstrate that acetohydroxyacid synthase (AHAS), the first enzyme in the branched-chain amino acid biosynthesis pathway, is a promising new target for antifungal drug discovery. First, we show that several AHAS inhibitors developed as commercial herbicides are powerful accumulative inhibitors of Candida albicans AHAS (Ki values as low as 800 pM) and have determined high-resolution crystal structures of this enzyme in complex with several of these herbicides. In addition, we have demonstrated that chlorimuron ethyl (CE), a member of the sulfonylurea herbicide family, has potent antifungal activity against five different Candida species and Cryptococcus neoformans (with minimum inhibitory concentration, 50% values as low as 7 nM). Furthermore, in these assays, we have shown CE and itraconazole (a P450 inhibitor) can act synergistically to further improve potency. Finally, we show in Candida albicans-infected mice that CE is highly effective in clearing pathogenic fungal burden in the lungs, liver, and spleen, thus reducing overall mortality rates. Therefore, in view of their low toxicity to human cells, AHAS inhibitors represent a new class of antifungal drug candidates.

Commercial AHAS-inhibiting herbicides are promising drug leads for the treatment of human fungal pathogenic infections.,Garcia MD, Chua SMH, Low YS, Lee YT, Agnew-Francis K, Wang JG, Nouwens A, Lonhienne T, Williams CM, Fraser JA, Guddat LW Proc Natl Acad Sci U S A. 2018 Sep 24. pii: 1809422115. doi:, 10.1073/pnas.1809422115. PMID:30249642<ref>PMID:30249642</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6deq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Candida albicans SC5314]]
[[Category: Large Structures]]
[[Category: Garcia MD]]
[[Category: Guddat LW]]