2AZE

Structure of the Rb C-terminal domain bound to an E2F1-DP1 heterodimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Rb C-terminal domain bound to E2F1-DP1: a mechanism for phosphorylation-induced E2F release.

Rubin, S.M.Gall, A.L.Zheng, N.Pavletich, N.P.

(2005) Cell 123: 1093-1106

  • DOI: 10.1016/j.cell.2005.09.044

  • PubMed Abstract: 
  • The retinoblastoma (Rb) protein negatively regulates the G1-S transition by binding to the E2F transcription factors, until cyclin-dependent kinases phosphorylate Rb, causing E2F release. The Rb pocket domain is necessary for E2F binding, but the Rb ...

    The retinoblastoma (Rb) protein negatively regulates the G1-S transition by binding to the E2F transcription factors, until cyclin-dependent kinases phosphorylate Rb, causing E2F release. The Rb pocket domain is necessary for E2F binding, but the Rb C-terminal domain (RbC) is also required for growth suppression. Here we demonstrate a high-affinity interaction between RbC and E2F-DP heterodimers shared by all Rb and E2F family members. The crystal structure of an RbC-E2F1-DP1 complex reveals an intertwined heterodimer in which the marked box domains of both E2F1 and DP1 contact RbC. We also demonstrate that phosphorylation of RbC at serines 788 and 795 destabilizes one set of RbC-E2F-DP interactions directly, while phosphorylation at threonines 821 and 826 induces an intramolecular interaction between RbC and the Rb pocket that destabilizes the remaining interactions indirectly. Our findings explain the requirement of RbC for high-affinity E2F binding and growth suppression and establish a mechanism for the regulation of Rb-E2F association by phosphorylation.


    Organizational Affiliation

    Structural Biology Program and Howard Hughes Medical Institute, Memorial Sloan-Kettering Cancer Center, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transcription factor Dp-1
A
155Homo sapiensGene Names: TFDP1 (DP1)
Find proteins for Q14186 (Homo sapiens)
Go to Gene View: TFDP1
Go to UniProtKB:  Q14186
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transcription factor E2F1
B
106Homo sapiensGene Names: E2F1 (RBBP3)
Find proteins for Q01094 (Homo sapiens)
Go to Gene View: E2F1
Go to UniProtKB:  Q01094
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Retinoblastoma-associated protein
C
46Homo sapiensGene Names: RB1
Find proteins for P06400 (Homo sapiens)
Go to Gene View: RB1
Go to UniProtKB:  P06400
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.221 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 146.800α = 90.00
b = 168.600β = 90.00
c = 48.300γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-31
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance