1o9k

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{{STRUCTURE_1o9k| PDB=1o9k | SCENE= }}
{{STRUCTURE_1o9k| PDB=1o9k | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE RETINOBLASTOMA TUMOUR SUPPRESSOR PROTEIN BOUND TO E2F PEPTIDE'''
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===CRYSTAL STRUCTURE OF THE RETINOBLASTOMA TUMOUR SUPPRESSOR PROTEIN BOUND TO E2F PEPTIDE===
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==Overview==
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The retinoblastoma tumor suppressor protein (pRb) regulates the cell cycle, facilitates differentiation, and restrains apoptosis. Furthermore, dysfunctional pRb is thought to be involved in the development of most human malignancies. Many of the functions of pRb are mediated by its regulation of the E2F transcription factors. To understand the structural basis for this regulation, we have determined the crystal structure of a fragment of E2F in complex with the pocket domain of the tumor suppressor protein. The pRb pocket, comprising the A and B cyclin-like domains, is the major focus of tumourigenic mutations in the protein. The fragment of E2F used in our structural studies, residues 409-426 of E2F-1, represents the core of the pRb-binding region of the transcription factor. The structure shows that E2F binds at the interface of the A and B domains of the pocket making extensive interactions with conserved residues from both. We show by solution studies that a second site, probably contained within the "marked box" region of E2F, is responsible for additional interactions with the pRb pocket but is insufficient for complex formation on its own. In addition, we show that the interaction of the core binding fragment of E2F with pRb is inhibited by phosphorylation of the tumor suppressor protein by CDK2cyclin DE. Finally, our data reveal that the tight binding of the human papillomavirus E7 oncoprotein to pRb prevents subsequent interactions with the marked box region of E2F but not with its core binding region.
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(as it appears on PubMed at http://www.pubmed.gov), where 12598654 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12598654}}
==About this Structure==
==About this Structure==
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[[Category: Cell cycle regulation]]
[[Category: Cell cycle regulation]]
[[Category: Dna-binding]]
[[Category: Dna-binding]]
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Revision as of 09:52, 10 July 2008

Image:1o9k.png


PDB ID 1o9k

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1o9k, resolution 2.60Å ()
Related: 1pjm, 1n4m, 1h24, 1ad6, 1h25, 1gh6, 1gux, 2aze
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml



CRYSTAL STRUCTURE OF THE RETINOBLASTOMA TUMOUR SUPPRESSOR PROTEIN BOUND TO E2F PEPTIDE

Template:ABSTRACT PUBMED 12598654

About this Structure

1O9K is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of the retinoblastoma tumor suppressor protein bound to E2F and the molecular basis of its regulation., Xiao B, Spencer J, Clements A, Ali-Khan N, Mittnacht S, Broceno C, Burghammer M, Perrakis A, Marmorstein R, Gamblin SJ, Proc Natl Acad Sci U S A. 2003 Mar 4;100(5):2363-8. Epub 2003 Feb 21. PMID:12598654

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