1rf2: Difference between revisions
New page: left|200px<br /><applet load="1rf2" size="450" color="white" frame="true" align="right" spinBox="true" caption="1rf2, resolution 1.35Å" /> '''Cholera Toxin B-Pent... |
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[[Image:1rf2.jpg|left|200px]]<br /><applet load="1rf2" size=" | [[Image:1rf2.jpg|left|200px]]<br /><applet load="1rf2" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="1rf2, resolution 1.35Å" /> | caption="1rf2, resolution 1.35Å" /> | ||
'''Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV4'''<br /> | '''Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV4'''<br /> | ||
==Overview== | ==Overview== | ||
A series of bivalent ligands of varying length were synthesized to inhibit | 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. | ||
==About this Structure== | ==About this Structure== | ||
1RF2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Vibrio_cholerae Vibrio cholerae] with BV4, TRS and PGE as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | 1RF2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Vibrio_cholerae Vibrio cholerae] with <scene name='pdbligand=BV4:'>BV4</scene>, <scene name='pdbligand=TRS:'>TRS</scene> and <scene name='pdbligand=PGE:'>PGE</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RF2 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: Vibrio cholerae]] | [[Category: Vibrio cholerae]] | ||
[[Category: Fan, E.]] | [[Category: Fan, E.]] | ||
[[Category: Hol, W | [[Category: Hol, W G.]] | ||
[[Category: Liu, J.]] | [[Category: Liu, J.]] | ||
[[Category: Mitchell, D | [[Category: Mitchell, D D.]] | ||
[[Category: Pickens, J | [[Category: Pickens, J C.]] | ||
[[Category: Tan, X.]] | [[Category: Tan, X.]] | ||
[[Category: Verlinde, C | [[Category: Verlinde, C L.]] | ||
[[Category: Zhang, Z.]] | [[Category: Zhang, Z.]] | ||
[[Category: BV4]] | [[Category: BV4]] | ||
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[[Category: toxin]] | [[Category: toxin]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:50:11 2008'' | ||
Revision as of 15:50, 21 February 2008
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Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV4
OverviewOverview
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.
About this StructureAbout this Structure
1RF2 is a Single protein structure of sequence from Vibrio cholerae with , and as ligands. Full crystallographic information is available from OCA.
ReferenceReference
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
Page seeded by OCA on Thu Feb 21 14:50:11 2008