3EIQ

Crystal structure of Pdcd4-eIF4A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for translational inhibition by the tumour suppressor Pdcd4

Loh, P.G.Yang, H.S.Walsh, M.A.Wang, Q.Wang, X.Cheng, Z.Liu, D.Song, H.

(2009) Embo J. 28: 274-285

  • DOI: 10.1038/emboj.2008.278
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pdcd4 is a tumour suppressor protein. It inhibits translation through interaction with translation initiator eIF4A, resulting in the suppression of neoplastic transformation and tumour invasion. Here, we present the crystal structures of an N-termina ...

    Pdcd4 is a tumour suppressor protein. It inhibits translation through interaction with translation initiator eIF4A, resulting in the suppression of neoplastic transformation and tumour invasion. Here, we present the crystal structures of an N-terminal-truncated Pdcd4 in free form and in complex with eIF4A. Upon binding to eIF4A, Pdcd4 undergoes a marked conformational change to form a heterotrimeric complex with eIF4A, with one Pdcd4 binding to two eIF4A molecules in two different modes. The binding of Pdcd4 to eIF4A is required to inhibit the enzymatic activity of eIF4A, translation initiation, and AP-1-dependent transcription. Both MA3 domains are required to efficiently compete with the C-terminal domain of eIF4G (eIF4Gc) for binding to eIF4A whereas a single MA3 is sufficient to inhibit translation. Our structural and mutational analyses reveal that Pdcd4 inhibits translation initiation by trapping eIF4A in an inactive conformation, and blocking its incorporation into the eIF4F complex.


    Organizational Affiliation

    Institute of Molecular and Cell Biology, Proteos, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic initiation factor 4A-I
A, D
414Homo sapiensMutation(s): 0 
Gene Names: EIF4A1 (DDX2A, EIF4A)
EC: 3.6.4.13
Find proteins for P60842 (Homo sapiens)
Go to Gene View: EIF4A1
Go to UniProtKB:  P60842
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Programmed cell death protein 4
C
358Mus musculusMutation(s): 0 
Gene Names: Pdcd4 (Ma3, Tis)
Find proteins for Q61823 (Mus musculus)
Go to UniProtKB:  Q61823
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.220 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 198.362α = 90.00
b = 198.362β = 90.00
c = 198.362γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2013-10-16
    Type: Derived calculations