View source for 9mlt


==Crystal structure of dihydrofolate reductase (DHFR) from the filarial nematode W. bancrofti in complex with NADPH and [2-({4-[(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)methyl]benzene-1-carbonyl}amino)-4-cyanophenyl]acetic acid (TSD25 or OFD)==
<StructureSection load='9mlt' size='340' side='right'caption='[[9mlt]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9mlt]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Wuchereria_bancrofti Wuchereria bancrofti]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9MLT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9MLT 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]] 2.105&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene>, <scene name='pdbligand=OFD:2-[2-[[4-[(2-azanyl-4-oxidanylidene-3,7-dihydropyrrolo[2,3-d]pyrimidin-5-yl)methyl]phenyl]carbonylamino]-4-cyano-phenyl]ethanoic+acid'>OFD</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=9mlt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9mlt OCA], [https://pdbe.org/9mlt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9mlt RCSB], [https://www.ebi.ac.uk/pdbsum/9mlt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9mlt ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/J9F199_WUCBA J9F199_WUCBA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Lymphatic filariasis, caused by Wuchereria bancrofti, remains a global health challenge. The enzyme Wuchereria bancrofti dihydrofolate reductase (WbDHFR) is a potential therapeutic target due to DHFR's critical role in folate metabolism and DNA synthesis. In this study, we employed a virtual screening workflow to repurpose antifolate compounds as WbDHFR inhibitors. Using structural data from the Protein Data Bank, we constructed a library of 194 antifolates and docked them to the WbDHFR folate binding site. Compounds methotrexate, TSD001, TSD10, and TSD25, with docking scores ranging from -9 to -8 kcal/mol, were selected for experimental validation. Inhibition assays demonstrated nanomolar activity with methotrexate and low micromolar activity with TSD001 (K(i) = 1 muM). Crystallographic studies revealed high-resolution structures of WbDHFR in complex with methotrexate (2.4 A), TSD001 (2.9 A), TSD10 (1.8 A) and TSD25 (2.1 A), providing detailed insights into binding interactions. Major interactions common for the inhibitors include hydrogen bonds with Glu32. These findings highlight the effectiveness of the virtual screening workflow and establish a foundation for optimizing these antifolate compounds for WbDHFR inhibition. This workflow can be applied to other parasitic DHFR enzymes, advancing drug discovery efforts against neglected tropical diseases.

A virtual screening strategy to repurpose antifolate compounds as W.bancrofti DHFR inhibitors.,Kwarteng S, Wilhelm J, Salama M, Salama M, Hollander K, Anderson KS, Goodey NM, Frey KM Bioorg Med Chem Lett. 2025 Aug 12;129:130370. doi: 10.1016/j.bmcl.2025.130370. PMID:40812516<ref>PMID:40812516</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9mlt" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Wuchereria bancrofti]]
[[Category: Frey KM]]
[[Category: Goodey NM]]
[[Category: Kwarteng S]]
[[Category: Wilhelm J]]