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[[ | ==Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV3== | ||
<StructureSection load='1rdp' size='340' side='right' caption='[[1rdp]], [[Resolution|resolution]] 1.35Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1rdp]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Vibrio_cholerae Vibrio cholerae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RDP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1RDP FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BV3:1,3-BIS-([[3-(4-{3-[3-NITRO-5-(GALACTOPYRANOSYLOXY)-BENZOYLAMINO]-PROPYL}-PIPERAZIN-1-YL)-PROPYLAMINO-3,4-DIOXO-CYCLOBUTENYL]-AMINO-ETHYL]-AMINO-CARBONYLOXY)-2-AMINO-PROPANE'>BV3</scene>, <scene name='pdbligand=PGE:TRIETHYLENE+GLYCOL'>PGE</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1rcv|1rcv]], [[1rd9|1rd9]], [[1rf2|1rf2]]</td></tr> | |||
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ctxB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=666 Vibrio cholerae])</td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1rdp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rdp OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1rdp RCSB], [http://www.ebi.ac.uk/pdbsum/1rdp PDBsum]</span></td></tr> | |||
<table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
A series of bivalent ligands of varying length were synthesized to inhibit the receptor-binding process of cholera toxin. Competitive surface receptor binding assays showed that significant potency gains relative to the constituent monovalent ligands were achieved independently from the ability of the extended bivalent ligands to span binding sites within the toxin pentamer. Several models that could account for the unexpected improvement in IC(50) values are examined, taking into account crystallographic analysis of each ligand in complex with the toxin pentamer. Evidence is presented that steric blocking at the receptor binding surface may play a role. The results of our study suggest that the use of relatively short, "nonspanning" bivalent ligands, or monovalent ligands of similar topology and bulk may be an effective way of blocking the interaction of multimeric proteins with their cell surface receptors. | |||
Nonspanning bivalent ligands as improved surface receptor binding inhibitors of the cholera toxin B pentamer.,Pickens JC, Mitchell DD, Liu J, Tan X, Zhang Z, Verlinde CL, Hol WG, Fan E Chem Biol. 2004 Sep;11(9):1205-15. PMID:15380181<ref>PMID:15380181</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Cholera toxin|Cholera toxin]] | *[[Cholera toxin|Cholera toxin]] | ||
*[[User:David Solfiell/sandbox 1|User:David Solfiell/sandbox 1]] | *[[User:David Solfiell/sandbox 1|User:David Solfiell/sandbox 1]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Vibrio cholerae]] | [[Category: Vibrio cholerae]] | ||
[[Category: Fan, E.]] | [[Category: Fan, E.]] | ||
Revision as of 23:20, 28 September 2014
Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV3Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV3
Structural highlights
Publication Abstract from PubMedA series of bivalent ligands of varying length were synthesized to inhibit the receptor-binding process of cholera toxin. Competitive surface receptor binding assays showed that significant potency gains relative to the constituent monovalent ligands were achieved independently from the ability of the extended bivalent ligands to span binding sites within the toxin pentamer. Several models that could account for the unexpected improvement in IC(50) values are examined, taking into account crystallographic analysis of each ligand in complex with the toxin pentamer. Evidence is presented that steric blocking at the receptor binding surface may play a role. The results of our study suggest that the use of relatively short, "nonspanning" bivalent ligands, or monovalent ligands of similar topology and bulk may be an effective way of blocking the interaction of multimeric proteins with their cell surface receptors. Nonspanning bivalent ligands as improved surface receptor binding inhibitors of the cholera toxin B pentamer.,Pickens JC, Mitchell DD, Liu J, Tan X, Zhang Z, Verlinde CL, Hol WG, Fan E Chem Biol. 2004 Sep;11(9):1205-15. PMID:15380181[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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