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==E. coli dihydropteroate synthase complexed with an 8-mercaptoguanine derivative: 4-{2-[(2-amino-6-oxo-6,9-dihydro-1H-purin-8-yl)sulfanyl]ethyl}benzene-1-sulfonamide== | |||
<StructureSection load='5u14' size='340' side='right' caption='[[5u14]], [[Resolution|resolution]] 1.95Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5u14]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U14 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5U14 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=7PV:4-{2-[(2-amino-6-oxo-6,9-dihydro-1H-purin-8-yl)sulfanyl]ethyl}benzene-1-sulfonamide'>7PV</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5u0v|5u0v]], [[5u0w|5u0w]], [[5u0x|5u0x]], [[5u0y|5u0y]], [[5u0z|5u0z]], [[5u10|5u10]], [[5u11|5u11]], [[5u12|5u12]], [[5u13|5u13]]</td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Dihydropteroate_synthase Dihydropteroate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.15 2.5.1.15] </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=5u14 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u14 OCA], [http://pdbe.org/5u14 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5u14 RCSB], [http://www.ebi.ac.uk/pdbsum/5u14 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5u14 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/DHPS_ECOL6 DHPS_ECOL6]] Catalyzes the condensation of para-aminobenzoate (pABA) with 6-hydroxymethyl-7,8-dihydropterin diphosphate (DHPt-PP) to form 7,8-dihydropteroate (H2Pte), the immediate precursor of folate derivatives.[UniProtKB:P0AC13] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Dihydropteroate synthase (DHPS) is an enzyme of the folate biosynthesis pathway which catalyzes the formation of 7,8-dihydropteroate (DHPt) from 6-hydroxymethyl-7,8-dihydropterin pyrophosphate (DHPPP) and para-aminobenzoic acid (pABA). DHPS is the long-standing target of the sulfonamide class of antibiotics that compete with pABA. In the wake of sulfa drug resistance, targeting the structurally rigid (and more conserved) pterin site has been proposed as an alternate strategy to inhibit DHPS in wild-type and sulfa drug resistant strains. Following work developing pterin-site inhibitors of the adjacent enzyme 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (HPPK), we now present derivatives of 8-mercaptoguanine, a fragment that binds weakly within both enzymes, and quantify sub-muM binding using Surface Plasmon Resonance (SPR) to Escherichia coli DHPS (EcDHPS). Eleven ligand-bound EcDHPS crystal structures delineate the structure-activity relationship observed providing a structural framework for the rational development of novel, substrate envelope-compliant DHPS inhibitors. | |||
8-Mercaptoguanine derivatives as inhibitors of dihydropteroate synthase.,Swarbrick J, Dennis M, Lee M, Harjani J, Ahmed M, Debono A, Pitcher N, Wang ZC, Chhabra S, Barlow N, Rahmani R, Cleary B, Dolezal O, Hattarki M, Aurelio L, Shonberg J, Graham B, Peat T, Baell J Chemistry. 2017 Nov 24. doi: 10.1002/chem.201704730. PMID:29171692<ref>PMID:29171692</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 5u14" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Dihydropteroate synthase]] | |||
[[Category: Dennis, M L]] | |||
[[Category: Peat, T S]] | |||
[[Category: Swarbrick, J D]] | |||
[[Category: Complex]] | |||
[[Category: Dhp]] | |||
[[Category: E. coli]] | |||
[[Category: Pterin site]] | |||
[[Category: Transferase]] | |||
Revision as of 10:13, 6 December 2017
E. coli dihydropteroate synthase complexed with an 8-mercaptoguanine derivative: 4-{2-[(2-amino-6-oxo-6,9-dihydro-1H-purin-8-yl)sulfanyl]ethyl}benzene-1-sulfonamide
Structural highlights
Function[DHPS_ECOL6] Catalyzes the condensation of para-aminobenzoate (pABA) with 6-hydroxymethyl-7,8-dihydropterin diphosphate (DHPt-PP) to form 7,8-dihydropteroate (H2Pte), the immediate precursor of folate derivatives.[UniProtKB:P0AC13] Publication Abstract from PubMedDihydropteroate synthase (DHPS) is an enzyme of the folate biosynthesis pathway which catalyzes the formation of 7,8-dihydropteroate (DHPt) from 6-hydroxymethyl-7,8-dihydropterin pyrophosphate (DHPPP) and para-aminobenzoic acid (pABA). DHPS is the long-standing target of the sulfonamide class of antibiotics that compete with pABA. In the wake of sulfa drug resistance, targeting the structurally rigid (and more conserved) pterin site has been proposed as an alternate strategy to inhibit DHPS in wild-type and sulfa drug resistant strains. Following work developing pterin-site inhibitors of the adjacent enzyme 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (HPPK), we now present derivatives of 8-mercaptoguanine, a fragment that binds weakly within both enzymes, and quantify sub-muM binding using Surface Plasmon Resonance (SPR) to Escherichia coli DHPS (EcDHPS). Eleven ligand-bound EcDHPS crystal structures delineate the structure-activity relationship observed providing a structural framework for the rational development of novel, substrate envelope-compliant DHPS inhibitors. 8-Mercaptoguanine derivatives as inhibitors of dihydropteroate synthase.,Swarbrick J, Dennis M, Lee M, Harjani J, Ahmed M, Debono A, Pitcher N, Wang ZC, Chhabra S, Barlow N, Rahmani R, Cleary B, Dolezal O, Hattarki M, Aurelio L, Shonberg J, Graham B, Peat T, Baell J Chemistry. 2017 Nov 24. doi: 10.1002/chem.201704730. PMID:29171692[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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