|
|
| Line 1: |
Line 1: |
| [[Image:1pcg.gif|left|200px]] | | {{Seed}} |
| | [[Image:1pcg.png|left|200px]] |
|
| |
|
| <!-- | | <!-- |
| Line 9: |
Line 10: |
| {{STRUCTURE_1pcg| PDB=1pcg | SCENE= }} | | {{STRUCTURE_1pcg| PDB=1pcg | SCENE= }} |
|
| |
|
| '''Helix-stabilized cyclic peptides as selective inhibitors of steroid receptor-coactivator interactions'''
| | ===Helix-stabilized cyclic peptides as selective inhibitors of steroid receptor-coactivator interactions=== |
|
| |
|
|
| |
|
| ==Overview==
| | <!-- |
| The interaction between nuclear receptors and coactivators provides an arena for testing whether protein-protein interactions may be inhibited by small molecule drug candidates. We provide evidence that a short cyclic peptide, containing a copy of the LXXLL nuclear receptor box pentapeptide, binds tightly and selectively to estrogen receptor alpha. Furthermore, as shown by x-ray analysis, the disulfide-bridged nonapeptide, nonhelical in aqueous solutions, is able to adopt a quasihelical conformer while binding to the groove created by ligand attachment to estrogen receptor alpha. An i, i+3 linked analog, H-Lys-cyclo(d-Cys-Ile-Leu-Cys)-Arg-Leu-Leu-Gln-NH2 (peptidomimetic estrogen receptor modulator 1), binds with a Ki of 25 nM, significantly better than an i, i+4 bridged cyclic amide, as predicted by molecular modeling design criteria. The induction of helical character, effective binding, and receptor selectivity exhibited by this peptide analog provide strong support for this strategy. The stabilization of minimalist surface motifs may prove useful for the control of other macromolecular assemblies, especially when an amphiphilic helix is crucial for the strong binding interaction between two proteins. | | The line below this paragraph, {{ABSTRACT_PUBMED_13679575}}, adds the Publication Abstract to the page |
| | (as it appears on PubMed at http://www.pubmed.gov), where 13679575 is the PubMed ID number. |
| | --> |
| | {{ABSTRACT_PUBMED_13679575}} |
|
| |
|
| ==About this Structure== | | ==About this Structure== |
| Line 32: |
Line 36: |
| [[Category: Wittliff, J L.]] | | [[Category: Wittliff, J L.]] |
| [[Category: Co-activator binding site]] | | [[Category: Co-activator binding site]] |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 04:56:10 2008'' | | |
| | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 13:32:12 2008'' |
