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| | <StructureSection load='6pib' size='340' side='right'caption='[[6pib]], [[Resolution|resolution]] 2.26Å' scene=''> | | <StructureSection load='6pib' size='340' side='right'caption='[[6pib]], [[Resolution|resolution]] 2.26Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6pib]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_pneumoniae"_(schroeter_1886)_flugge_1886 "bacillus pneumoniae" (schroeter 1886) flugge 1886]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6PIB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6PIB FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6pib]] is a 1 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=6PIB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6PIB FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=OKV:1-[5-({4-[3-(trifluoromethyl)phenyl]piperazin-1-yl}sulfonyl)-2,3-dihydro-1H-indol-1-yl]ethan-1-one'>OKV</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.26Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">lpxH_1, lpxH, C3483_19950, NCTC9128_00880, SAMEA104305404_03891 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=573 "Bacillus pneumoniae" (Schroeter 1886) Flugge 1886])</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=OKV:1-[5-({4-[3-(trifluoromethyl)phenyl]piperazin-1-yl}sulfonyl)-2,3-dihydro-1H-indol-1-yl]ethan-1-one'>OKV</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/UDP-2,3-diacylglucosamine_diphosphatase UDP-2,3-diacylglucosamine diphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.54 3.6.1.54] </span></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=6pib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6pib OCA], [https://pdbe.org/6pib PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6pib RCSB], [https://www.ebi.ac.uk/pdbsum/6pib PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6pib ProSAT]</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=6pib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6pib OCA], [http://pdbe.org/6pib PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6pib RCSB], [http://www.ebi.ac.uk/pdbsum/6pib PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6pib ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/A0A1S0WIC1_KLEPN A0A1S0WIC1_KLEPN]] Hydrolyzes the pyrophosphate bond of UDP-2,3-diacylglucosamine to yield 2,3-diacylglucosamine 1-phosphate (lipid X) and UMP by catalyzing the attack of water at the alpha-P atom. Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[HAMAP-Rule:MF_00575][SAAS:SAAS00911811] | + | [https://www.uniprot.org/uniprot/LPXH_KLEP7 LPXH_KLEP7] Hydrolyzes the pyrophosphate bond of UDP-2,3-diacylglucosamine to yield 2,3-diacylglucosamine 1-phosphate (lipid X) and UMP by catalyzing the attack of water at the alpha-P atom. Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[HAMAP-Rule:MF_00575] |
| | <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: UDP-2,3-diacylglucosamine diphosphatase]]
| + | [[Category: Cho J]] |
| - | [[Category: Cho, J]] | + | [[Category: Zhou P]] |
| - | [[Category: Zhou, P]] | + | |
| - | [[Category: Az1]]
| + | |
| - | [[Category: Biosynthetic protein]]
| + | |
| - | [[Category: Inhibitor]]
| + | |
| - | [[Category: Lipid some]]
| + | |
| - | [[Category: Lpxh]]
| + | |
| Structural highlights
Function
LPXH_KLEP7 Hydrolyzes the pyrophosphate bond of UDP-2,3-diacylglucosamine to yield 2,3-diacylglucosamine 1-phosphate (lipid X) and UMP by catalyzing the attack of water at the alpha-P atom. Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[HAMAP-Rule:MF_00575]
Publication Abstract from PubMed
The UDP-2,3-diacylglucosamine pyrophosphate hydrolase LpxH is an essential lipid A biosynthetic enzyme that is conserved in the majority of gram-negative bacteria. It has emerged as an attractive novel antibiotic target due to the recent discovery of an LpxH-targeting sulfonyl piperazine compound (referred to as AZ1) by AstraZeneca. However, the molecular details of AZ1 inhibition have remained unresolved, stymieing further development of this class of antibiotics. Here we report the crystal structure of Klebsiella pneumoniae LpxH in complex with AZ1. We show that AZ1 fits snugly into the L-shaped acyl chain-binding chamber of LpxH with its indoline ring situating adjacent to the active site, its sulfonyl group adopting a sharp kink, and its N-CF3-phenyl substituted piperazine group reaching out to the far side of the LpxH acyl chain-binding chamber. Intriguingly, despite the observation of a single AZ1 conformation in the crystal structure, our solution NMR investigation has revealed the presence of a second ligand conformation invisible in the crystalline state. Together, these distinct ligand conformations delineate a cryptic inhibitor envelope that expands the observed footprint of AZ1 in the LpxH-bound crystal structure and enables the design of AZ1 analogs with enhanced potency in enzymatic assays. These designed compounds display striking improvement in antibiotic activity over AZ1 against wild-type K. pneumoniae, and coadministration with outer membrane permeability enhancers profoundly sensitizes Escherichia coli to designed LpxH inhibitors. Remarkably, none of the sulfonyl piperazine compounds occupies the active site of LpxH, foretelling a straightforward path for rapid optimization of this class of antibiotics.
Structural basis of the UDP-diacylglucosamine pyrophosphohydrolase LpxH inhibition by sulfonyl piperazine antibiotics.,Cho J, Lee M, Cochrane CS, Webster CG, Fenton BA, Zhao J, Hong J, Zhou P Proc Natl Acad Sci U S A. 2020 Feb 10. pii: 1912876117. doi:, 10.1073/pnas.1912876117. PMID:32041866[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Cho J, Lee M, Cochrane CS, Webster CG, Fenton BA, Zhao J, Hong J, Zhou P. Structural basis of the UDP-diacylglucosamine pyrophosphohydrolase LpxH inhibition by sulfonyl piperazine antibiotics. Proc Natl Acad Sci U S A. 2020 Feb 10. pii: 1912876117. doi:, 10.1073/pnas.1912876117. PMID:32041866 doi:http://dx.doi.org/10.1073/pnas.1912876117
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