1N4M

Structure of Rb tumor suppressor bound to the transactivation domain of E2F-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

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This is version 1.2 of the entry. See complete history


Literature

Structural basis for the recognition of the E2F transactivation domain by the retinoblastoma tumor suppressor

Lee, C.Chang, J.H.Lee, H.S.Cho, Y.

(2002) Genes Dev 16: 3199-3212

  • DOI: 10.1101/gad.1046102
  • Primary Citation of Related Structures:  
    1N4M

  • PubMed Abstract: 
  • Repression of E2F transcription activity by the retinoblastoma (Rb) tumor suppressor through its interaction with the transactivation domain of the E2F transcription factor is one of the central features of G1/S arrest in the mammalian cell cycle. Deregulation of the Rb-E2F interaction results in hyperproliferation, lack of differentiation, and apoptosis, and can lead to cancer ...

    Repression of E2F transcription activity by the retinoblastoma (Rb) tumor suppressor through its interaction with the transactivation domain of the E2F transcription factor is one of the central features of G1/S arrest in the mammalian cell cycle. Deregulation of the Rb-E2F interaction results in hyperproliferation, lack of differentiation, and apoptosis, and can lead to cancer. The 2.2-A crystal structure of the Rb pocket complexed with an 18-residue transactivation-domain peptide of E2F-2 reveals that the boomerang-shaped peptide binds to the highly conserved interface between the A-box and the B-box of the Rb pocket in a bipartite manner. The N-terminal segment of the E2F-2 peptide in an extended beta-strand-like structure interacts with helices from the conserved groove at the A-B interface, whereas the C-terminal segment, which contains one 3(10) helix, binds to a groove mainly formed by A-box helices. The flexibility in the middle of the E2F-2 peptide is essential for the tight association of E2F to the Rb pocket. The binding of Rb to the E2F-2 peptide conceals several conserved residues that are crucial for transcription activation of E2F. We provide the structural basis for the Rb-mediated repression of E2F transcription activity without the requirement of histone-modifying enzymes.


    Organizational Affiliation

    National Creative Research Center for Structural Biology and Department of Life Science, Pohang University of Science and Technology, San 31, KyungBook, South Korea.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Retinoblastoma PocketA, B345Homo sapiensMutation(s): 0 
Gene Names: RB1
Find proteins for P06400 (Homo sapiens)
Explore P06400 
Go to UniProtKB:  P06400
NIH Common Fund Data Resources
PHAROS:  P06400
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor E2F2C, D, E18N/AMutation(s): 0 
Find proteins for Q14209 (Homo sapiens)
Explore Q14209 
Go to UniProtKB:  Q14209
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PHAROS:  Q14209
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.369α = 85.55
b = 65.164β = 79.48
c = 69.339γ = 67.16
Software Package:
Software NamePurpose
DENZOdata reduction
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-07
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance