5ecc: Difference between revisions
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<StructureSection load='5ecc' size='340' side='right'caption='[[5ecc]], [[Resolution|resolution]] 1.87Å' scene=''> | <StructureSection load='5ecc' size='340' side='right'caption='[[5ecc]], [[Resolution|resolution]] 1.87Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5ecc]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[5ecc]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ECC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5ECC FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=6DR:6-ETHYL-5-{3-[2-METHOXY-5-(PYRIDIN-4-YL)PHENYL]PROP-1-YN-1-YL}PYRIMIDINE-2,4-DIAMINE'>6DR</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.87Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6DR:6-ETHYL-5-{3-[2-METHOXY-5-(PYRIDIN-4-YL)PHENYL]PROP-1-YN-1-YL}PYRIMIDINE-2,4-DIAMINE'>6DR</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</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=5ecc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ecc OCA], [https://pdbe.org/5ecc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5ecc RCSB], [https://www.ebi.ac.uk/pdbsum/5ecc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5ecc ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/A4GRC7_KLEPN A4GRC7_KLEPN] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Klebsiella pneumoniae]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Anderson | [[Category: Anderson AC]] | ||
[[Category: Lombardo | [[Category: Lombardo MN]] | ||
Revision as of 09:21, 5 July 2023
Klebsiella pneumoniae DfrA1 complexed with NADPH and 6-ethyl-5-(3-(2-methoxy-5-(pyridin-4-yl)phenyl)prop-1-yn-1-yl)pyrimidine-2,4-diamineKlebsiella pneumoniae DfrA1 complexed with NADPH and 6-ethyl-5-(3-(2-methoxy-5-(pyridin-4-yl)phenyl)prop-1-yn-1-yl)pyrimidine-2,4-diamine
Structural highlights
FunctionPublication Abstract from PubMedMultidrug-resistant Enterobacteriaceae, notably Escherichia coli and Klebsiella pneumoniae, have become major health concerns worldwide. Resistance to effective therapeutics is often carried by class I and II integrons that can confer insensitivity to carbapenems, extended spectrum beta-lactamases, the antifolate trimethoprim, fluoroquinolones, and aminoglycosides. Specifically of interest to the study here, a prevalent gene (dfrA1) coding for an insensitive dihydrofolate reductase (DHFR) confers 190- or 1000-fold resistance to trimethoprim for K. pneumoniae and E. coli, respectively. Attaining inhibition of both the wild-type and resistant forms of the enzyme is critical for new antifolates. For several years, we have been developing the propargyl-linked antifolates (PLAs) as effective inhibitors against trimethoprim-resistant DHFR enzymes. Here, we show that the PLAs are active against both the wild-type and DfrA1 DHFR proteins. We report two high-resolution crystal structures of DfrA1 bound to potent PLAs. The structure-activity relationships and crystal structures will be critical in driving the design of broadly active inhibitors against wild-type and resistant DHFR. Crystal Structures of Trimethoprim-Resistant DfrA1 Rationalize Potent Inhibition by Propargyl-Linked Antifolates.,Lombardo MN, G-Dayanandan N, Wright DL, Anderson AC ACS Infect Dis. 2016 Feb 12;2(2):149-56. doi: 10.1021/acsinfecdis.5b00129. Epub, 2016 Jan 4. PMID:27624966[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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