2h9g
From Proteopedia
(New page: 200px<br /> <applet load="2h9g" size="450" color="white" frame="true" align="right" spinBox="true" caption="2h9g, resolution 2.32Å" /> '''Crystal structure o...) |
|||
| Line 1: | Line 1: | ||
| - | [[Image:2h9g.gif|left|200px]]<br /> | + | [[Image:2h9g.gif|left|200px]]<br /><applet load="2h9g" size="350" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="2h9g" size=" | + | |
caption="2h9g, resolution 2.32Å" /> | caption="2h9g, resolution 2.32Å" /> | ||
'''Crystal structure of phage derived Fab BdF1 with human Death Receptor 5 (DR5)'''<br /> | '''Crystal structure of phage derived Fab BdF1 with human Death Receptor 5 (DR5)'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The cell-extrinsic apoptotic pathway triggers programmed cell death in | + | The cell-extrinsic apoptotic pathway triggers programmed cell death in response to certain ligands that bind to cell-surface death receptors. Apoptosis is essential for normal development and homeostasis in metazoans, and furthermore, selective activation of the cell-extrinsic pathway in tumor cells holds considerable promise for cancer therapy. We used phage display to identify peptides and synthetic antibodies that specifically bind to the human proapoptotic death receptor DR5. Despite great differences in overall size and structure, the DR5-binding peptides and antibodies shared a tripeptide motif, which was conserved within a disulfide-constrained loop of the peptides and the third complementarity determining region of the antibody heavy chains. The X-ray crystal structure of an antibody in complex with DR5 revealed that the tripeptide motif is buried at the core of the interface, confirming its central role in antigen recognition. We found that certain peptides and antibodies exhibited potent proapoptotic activity against DR5-expressing SK-MES-1 lung carcinoma cells. These phage-derived ligands may be useful for elucidating DR5 activation at the molecular level and for creating synthetic agonists of proapoptotic death receptors. |
==Disease== | ==Disease== | ||
| Line 11: | Line 10: | ||
==About this Structure== | ==About this Structure== | ||
| - | 2H9G is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http:// | + | 2H9G is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2H9G OCA]. |
==Reference== | ==Reference== | ||
| Line 17: | Line 16: | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Compaan, D | + | [[Category: Compaan, D M.]] |
| - | [[Category: Hymowitz, S | + | [[Category: Hymowitz, S G.]] |
[[Category: agonists]] | [[Category: agonists]] | ||
[[Category: antibody library]] | [[Category: antibody library]] | ||
| Line 26: | Line 25: | ||
[[Category: protein engineering]] | [[Category: protein engineering]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:39:33 2008'' |
Revision as of 15:39, 21 February 2008
|
Crystal structure of phage derived Fab BdF1 with human Death Receptor 5 (DR5)
Contents |
Overview
The cell-extrinsic apoptotic pathway triggers programmed cell death in response to certain ligands that bind to cell-surface death receptors. Apoptosis is essential for normal development and homeostasis in metazoans, and furthermore, selective activation of the cell-extrinsic pathway in tumor cells holds considerable promise for cancer therapy. We used phage display to identify peptides and synthetic antibodies that specifically bind to the human proapoptotic death receptor DR5. Despite great differences in overall size and structure, the DR5-binding peptides and antibodies shared a tripeptide motif, which was conserved within a disulfide-constrained loop of the peptides and the third complementarity determining region of the antibody heavy chains. The X-ray crystal structure of an antibody in complex with DR5 revealed that the tripeptide motif is buried at the core of the interface, confirming its central role in antigen recognition. We found that certain peptides and antibodies exhibited potent proapoptotic activity against DR5-expressing SK-MES-1 lung carcinoma cells. These phage-derived ligands may be useful for elucidating DR5 activation at the molecular level and for creating synthetic agonists of proapoptotic death receptors.
Disease
Known diseases associated with this structure: Squamous cell carcinoma, head and neck OMIM:[603612]
About this Structure
2H9G is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Activation of the proapoptotic death receptor DR5 by oligomeric peptide and antibody agonists., Li B, Russell SJ, Compaan DM, Totpal K, Marsters SA, Ashkenazi A, Cochran AG, Hymowitz SG, Sidhu SS, J Mol Biol. 2006 Aug 18;361(3):522-36. Epub 2006 Jul 7. PMID:16859704
Page seeded by OCA on Thu Feb 21 17:39:33 2008
