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==Crystal Structure of a Pantothenate Synthetase from M. tuberculosis in complex with AMPCPP and pantoate== | ==Crystal Structure of a Pantothenate Synthetase from M. tuberculosis in complex with AMPCPP and pantoate== | ||
<StructureSection load='1n2e' size='340' side='right' caption='[[1n2e]], [[Resolution|resolution]] 1.60Å' scene=''> | <StructureSection load='1n2e' size='340' side='right' caption='[[1n2e]], [[Resolution|resolution]] 1.60Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">panC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 "Bacillus tuberculosis" (Zopf 1883) Klein 1884])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">panC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 "Bacillus tuberculosis" (Zopf 1883) Klein 1884])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pantoate--beta-alanine_ligase Pantoate--beta-alanine ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.1 6.3.2.1] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pantoate--beta-alanine_ligase Pantoate--beta-alanine ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.1 6.3.2.1] </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=1n2e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n2e OCA], [http://pdbe.org/1n2e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1n2e RCSB], [http://www.ebi.ac.uk/pdbsum/1n2e PDBsum]</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=1n2e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n2e OCA], [http://pdbe.org/1n2e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1n2e RCSB], [http://www.ebi.ac.uk/pdbsum/1n2e PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1n2e ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/n2/1n2e_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/n2/1n2e_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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</div> | </div> | ||
<div class="pdbe-citations 1n2e" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1n2e" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 11:10, 31 January 2018
Crystal Structure of a Pantothenate Synthetase from M. tuberculosis in complex with AMPCPP and pantoateCrystal Structure of a Pantothenate Synthetase from M. tuberculosis in complex with AMPCPP and pantoate
Structural highlights
Function[PANC_MYCTU] Catalyzes the condensation of pantoate with beta-alanine in an ATP-dependent reaction via a pantoyl-adenylate intermediate.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedPantothenate biosynthesis is essential for the virulence of Mycobacterium tuberculosis, and this pathway thus presents potential drug targets against tuberculosis. We determined the crystal structure of pantothenate synthetase (PS) from M. tuberculosis, and its complexes with AMPCPP, pantoate, and a reaction intermediate, pantoyl adenylate, with resolutions from 1.6 to 2 A. PS catalyzes the ATP-dependent condensation of pantoate and beta-alanine to form pantothenate. Its structure reveals a dimer, and each subunit has two domains with tight association between domains. The active-site cavity is on the N-terminal domain, partially covered by the C-terminal domain. One wall of the active site cavity is flexible, which allows the bulky AMPCPP to diffuse into the active site to nearly full occupancy when crystals are soaked in solutions containing AMPCPP. Crystal structures of the complexes with AMPCPP and pantoate indicate that the enzyme binds ATP and pantoate tightly in the active site, and brings the carboxyl oxygen of pantoate near the alpha-phosphorus atom of ATP for an in-line nucleophilic attack. When crystals were soaked with, or grown in the presence of, both ATP and pantoate, a reaction intermediate, pantoyl adenylate, is found in the active site. The flexible wall of the active site cavity becomes ordered when the intermediate is in the active site, thus protecting it from being hydrolyzed. Binding of beta-alanine can occur only after pantoyl adenylate is formed inside the active site cavity. The tight binding of the intermediate pantoyl adenylate suggests that nonreactive analogs of pantoyl adenylate may be inhibitors of the PS enzyme with high affinity and specificity. Crystal structures of a pantothenate synthetase from M. tuberculosis and its complexes with substrates and a reaction intermediate.,Wang S, Eisenberg D Protein Sci. 2003 May;12(5):1097-108. PMID:12717031[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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