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| | <StructureSection load='1jqy' size='340' side='right'caption='[[1jqy]], [[Resolution|resolution]] 2.14Å' scene=''> | | <StructureSection load='1jqy' size='340' side='right'caption='[[1jqy]], [[Resolution|resolution]] 2.14Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1jqy]] is a 15 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JQY OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1JQY FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1jqy]] is a 15 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JQY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1JQY FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A32:(3-NITRO-5-(3-MORPHOLIN-4-YL-PROPYLAMINOCARBONYL)PHENYL)-GALACTOPYRANOSIDE'>A32</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]] 2.14Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1lts|1lts]], [[1lta|1lta]], [[1lt6|1lt6]], [[1fd7|1fd7]], [[1jr0|1jr0]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=A32:(3-NITRO-5-(3-MORPHOLIN-4-YL-PROPYLAMINOCARBONYL)PHENYL)-GALACTOPYRANOSIDE'>A32</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ETXB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1jqy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jqy OCA], [https://pdbe.org/1jqy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1jqy RCSB], [https://www.ebi.ac.uk/pdbsum/1jqy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1jqy ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1jqy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jqy OCA], [http://pdbe.org/1jqy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1jqy RCSB], [http://www.ebi.ac.uk/pdbsum/1jqy PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1jqy ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ELBP_ECOLX ELBP_ECOLX]] The biological activity of the toxin is produced by the A chain, which activates intracellular adenyl cyclase. | + | [https://www.uniprot.org/uniprot/ELBP_ECOLX ELBP_ECOLX] The biological activity of the toxin is produced by the A chain, which activates intracellular adenyl cyclase. |
| | <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: Bacillus coli migula 1895]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Hol, W G.J]] | + | [[Category: Hol WGJ]] |
| - | [[Category: Merritt, E A]] | + | [[Category: Merritt EA]] |
| - | [[Category: B-pentamer]]
| + | |
| - | [[Category: Enterotoxin]]
| + | |
| - | [[Category: Ligand]]
| + | |
| - | [[Category: Receptor]]
| + | |
| - | [[Category: Toxin]]
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| Structural highlights
Function
ELBP_ECOLX The biological activity of the toxin is produced by the A chain, which activates intracellular adenyl cyclase.
Publication Abstract from PubMed
The action of cholera toxin and E. coli heat-labile enterotoxin can be inhibited by blocking their binding to the cell-surface receptor GM1. We have used anchor-based design to create 15 receptor binding inhibitors that contain the previously characterized inhibitor MNPG as a substructure. In ELISA assays, all 15 compounds exhibited increased potency relative to MNPG. Binding affinities for two compounds, each containing a morpholine ring linked to MNPG via a hydrophobic tail, were characterized by pulsed ultrafiltration (PUF) and isothermal titration calorimetry (ITC). Crystal structures for these compounds bound to toxin B pentamer revealed a conserved binding mode for the MNPG moiety, with multiple binding modes adopted by the attached morpholine derivatives. The observed binding interactions can be exploited in the design of improved toxin binding inhibitors.
Anchor-based design of improved cholera toxin and E. coli heat-labile enterotoxin receptor binding antagonists that display multiple binding modes.,Pickens JC, Merritt EA, Ahn M, Verlinde CL, Hol WG, Fan E Chem Biol. 2002 Feb;9(2):215-24. PMID:11880036[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Pickens JC, Merritt EA, Ahn M, Verlinde CL, Hol WG, Fan E. Anchor-based design of improved cholera toxin and E. coli heat-labile enterotoxin receptor binding antagonists that display multiple binding modes. Chem Biol. 2002 Feb;9(2):215-24. PMID:11880036
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