1sq5: Difference between revisions
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==Crystal Structure of E. coli Pantothenate kinase== | ==Crystal Structure of E. coli Pantothenate kinase== | ||
<StructureSection load='1sq5' size='340' side='right' caption='[[1sq5]], [[Resolution|resolution]] 2.20Å' scene=''> | <StructureSection load='1sq5' size='340' side='right' caption='[[1sq5]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">COAA, RTS, PANK, B3974, C4933, Z5545, ECS4901 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">COAA, RTS, PANK, B3974, C4933, Z5545, ECS4901 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pantothenate_kinase Pantothenate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.33 2.7.1.33] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pantothenate_kinase Pantothenate kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.33 2.7.1.33] </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=1sq5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sq5 OCA], [http://pdbe.org/1sq5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1sq5 RCSB], [http://www.ebi.ac.uk/pdbsum/1sq5 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=1sq5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sq5 OCA], [http://pdbe.org/1sq5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1sq5 RCSB], [http://www.ebi.ac.uk/pdbsum/1sq5 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1sq5 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
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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/sq/1sq5_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/sq/1sq5_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> | ||
Revision as of 11:00, 14 March 2018
Crystal Structure of E. coli Pantothenate kinaseCrystal Structure of E. coli Pantothenate kinase
Structural highlights
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 kinase catalyzes the first step in the biosynthesis of coenzyme A, the major acyl group carrier in biology. In bacteria, regulation of pantothenate kinase activity is a major factor in controlling intracellular coenzyme A levels, and pantothenate analogs are growth-inhibiting antimetabolites. We have extended the structural information on Escherichia coli pantothenate kinase by determining the structure of the enzyme.ADP. pantothenate ternary complex. Pantothenate binding induces a significant conformational change in amino acids 243-263, which form a "lid" that folds over the open pantothenate binding groove. The positioning of the substrates suggests the reaction proceeds by a concerted mechanism that involves a dissociative transition state, although the negative charge neutralization of the gamma-phosphate by Arg-243, Lys-101, and Mg(2+) coupled with hydrogen bonding of the C1 of pantothenate to Asp-127 suggests different interpretations of the phosphoryl transfer mechanism of pantothenate kinase. N-alkylpantothenamides are substrates for pantothenate kinase. Modeling these antimetabolites into the pantothenate active site predicts that they bind in the same orientation as pantothenate with their alkyl chains interacting with the hydrophobic dome over the pantothenate pocket, which is also accessed by the beta-mercaptoethylamine moiety of the allosteric regulator, coenzyme A. These structural/biochemical studies illustrate the intimate relationship between the substrate, allosteric regulator, and antimetabolite binding sites on pantothenate kinase and provide a framework for studies of its catalysis and feedback regulation. The structure of the pantothenate kinase.ADP.pantothenate ternary complex reveals the relationship between the binding sites for substrate, allosteric regulator, and antimetabolites.,Ivey RA, Zhang YM, Virga KG, Hevener K, Lee RE, Rock CO, Jackowski S, Park HW J Biol Chem. 2004 Aug 20;279(34):35622-9. Epub 2004 May 10. PMID:15136582[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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