2oqs: Difference between revisions

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[[Image:2oqs.jpg|left|200px]]
{{Seed}}
[[Image:2oqs.png|left|200px]]


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{{STRUCTURE_2oqs|  PDB=2oqs  |  SCENE=  }}  
{{STRUCTURE_2oqs|  PDB=2oqs  |  SCENE=  }}  


'''Structure of the hDLG/SAP97 PDZ2 in complex with HPV-18 papillomavirus E6 peptide'''
===Structure of the hDLG/SAP97 PDZ2 in complex with HPV-18 papillomavirus E6 peptide===




==Overview==
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The E6 protein from high-risk types of human papillomavirus (HPV) binds PDZ-domain containing proteins and targets them for degradation. We used isothermal titration calorimetry to measure the interaction of a peptide from the C-terminus of HPV-18 E6 to the second PDZ domain (PDZ2) from the human homologue of the Drosophila discs large tumor suppressor protein (hDlg). Isothermal titration calorimetry experiments with a series of peptides showed that HPV-18 E6 bound hDlg PDZ2 about 5-fold stronger than HPV-16 E6, that the contribution of Arg154 to binding was about 1 kcal/mol, and that the binding was disabled by phosphorylation at Thr156. We then used NMR to determine the solution structure of the complex of PDZ2 bound to the HPV-18 E6 peptide. The resultant structures were of high quality and had backbone root-mean-square deviations of less than 0.5 A. The structure shows a novel mode of interaction in which six residues of the HPV-18 E6 peptide are contacted by the PDZ2 domain, in contrast to the typical four residues used by class I PDZ domains. Molecular dynamics simulations supported a model in which the C- and N-terminal ends of the peptide had different mobilities within the complex. Comparison of the NMR complex structure to previously determined X-ray structures of PDZ2 by itself and bound to different peptides allows a description of conformational changes required for PDZ2 to bind to HPV-18 E6.
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{{ABSTRACT_PUBMED_17713926}}


==About this Structure==
==About this Structure==
2OQS is a [[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=2OQS OCA].  
2OQS is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OQS OCA].  


==Reference==
==Reference==
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[[Category: Peptide-binding protein]]
[[Category: Peptide-binding protein]]
[[Category: Protein-peptide complex]]
[[Category: Protein-peptide complex]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 11:28:43 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 12:54:49 2008''

Revision as of 09:55, 28 July 2008

File:2oqs.png

Template:STRUCTURE 2oqs

Structure of the hDLG/SAP97 PDZ2 in complex with HPV-18 papillomavirus E6 peptide

Template:ABSTRACT PUBMED 17713926

About this Structure

2OQS is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

Solution structure of the hDlg/SAP97 PDZ2 domain and its mechanism of interaction with HPV-18 papillomavirus E6 protein., Liu Y, Henry GD, Hegde RS, Baleja JD, Biochemistry. 2007 Sep 25;46(38):10864-74. Epub 2007 Aug 22. PMID:17713926

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