3U7X

Crystal structure of the human eIF4E-4EBP1 peptide complex without cap


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Insights into the Allosteric Effects of 4EBP1 on the Eukaryotic Translation Initiation Factor eIF4E.

Siddiqui, N.Tempel, W.Nedyalkova, L.Volpon, L.Wernimont, A.K.Osborne, M.J.Park, H.W.Borden, K.L.

(2012) J Mol Biol 415: 781-792

  • DOI: 10.1016/j.jmb.2011.12.002
  • Primary Citation of Related Structures:  
    3U7X, 3TF2

  • PubMed Abstract: 
  • The eukaryotic translation initiation factor eIF4E plays key roles in cap-dependent translation and mRNA export. These functions rely on binding the 7-methyl-guanosine moiety (5'cap) on the 5'-end of all mRNAs. eIF4E is regulated by proteins such as eIF4G and eIF4E binding proteins (4EBPs) that bind the dorsal surface of eIF4E, distal to the cap binding site, and modulate cap binding activity ...

    The eukaryotic translation initiation factor eIF4E plays key roles in cap-dependent translation and mRNA export. These functions rely on binding the 7-methyl-guanosine moiety (5'cap) on the 5'-end of all mRNAs. eIF4E is regulated by proteins such as eIF4G and eIF4E binding proteins (4EBPs) that bind the dorsal surface of eIF4E, distal to the cap binding site, and modulate cap binding activity. Both proteins increase the affinity of eIF4E for 5'cap. Our understanding of the allosteric effects and structural underpinnings of 4EBP1 or eIF4G binding can be advanced by obtaining structural data on cap-free eIF4E bound to one of these proteins. Here, we report the crystal structure of apo-eIF4E and cap-free eIF4E in complex with a 4EBP1 peptide. We also monitored 4EBP1 binding to cap-free eIF4E in solution using NMR. Together, these studies suggest that 4EBP1 transforms eIF4E into a cap-receptive state. NMR methods were also used to compare the allosteric routes activated by 4EBP1, eIF4G, and the arenavirus Z protein, a negative regulator of cap binding. We observed chemical shift perturbation at the dorsal binding site leading to alterations in the core of the protein, which were ultimately communicated to the unoccupied cap binding site of eIF4E. There were notable similarities between the routes taken by 4EBP1 and eIF4G and differences from the negative regulator Z. Thus, binding of 4EBP1 or eIF4G allosterically drives alterations throughout the protein that increase the affinity of eIF4E for the 5'cap.


    Organizational Affiliation

    Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada H3T 1J4.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 4E AB217Homo sapiensMutation(s): 0 
Gene Names: EIF4EEIF4EL1EIF4F
Find proteins for P06730 (Homo sapiens)
Explore P06730 
Go to UniProtKB:  P06730
NIH Common Fund Data Resources
PHAROS:  P06730
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 4E-binding protein 1 CD20Homo sapiensMutation(s): 0 
Gene Names: EIF4EBP1
Find proteins for Q13541 (Homo sapiens)
Explore Q13541 
Go to UniProtKB:  Q13541
NIH Common Fund Data Resources
PHAROS:  Q13541
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.5α = 90
b = 38.263β = 97.97
c = 93.533γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2012-02-08
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Refinement description