4TPW

The co-complex structure of the translation initiation factor eIF4E with the inhibitor 4EGI-1 reveals an allosteric mechanism for dissociating eIF4G


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Structure of the eukaryotic translation initiation factor eIF4E in complex with 4EGI-1 reveals an allosteric mechanism for dissociating eIF4G.

Papadopoulos, E.Jenni, S.Kabha, E.Takrouri, K.J.Yi, T.Salvi, N.Luna, R.E.Gavathiotis, E.Mahalingam, P.Arthanari, H.Rodriguez-Mias, R.Yefidoff-Freedman, R.Aktas, B.H.Chorev, M.Halperin, J.A.Wagner, G.

(2014) Proc.Natl.Acad.Sci.USA 111: E3187-E3195

  • DOI: 10.1073/pnas.1410250111
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The interaction of the eukaryotic translation initiation factor eIF4E with the initiation factor eIF4G recruits the 40S ribosomal particle to the 5' end of mRNAs, facilitates scanning to the AUG start codon, and is crucial for eukaryotic translation ...

    The interaction of the eukaryotic translation initiation factor eIF4E with the initiation factor eIF4G recruits the 40S ribosomal particle to the 5' end of mRNAs, facilitates scanning to the AUG start codon, and is crucial for eukaryotic translation of nearly all genes. Efficient recruitment of the 40S particle is particularly important for translation of mRNAs encoding oncoproteins and growth-promoting factors, which often harbor complex 5' UTRs and require efficient initiation. Thus, inhibiting the eIF4E/eIF4G interaction has emerged as a previously unpursued route for developing anticancer agents. Indeed, we discovered small-molecule inhibitors of this eIF4E/eIF4G interaction (4EGIs) that inhibit translation initiation both in vitro and in vivo and were used successfully in numerous cancer-biology and neurobiology studies. However, their detailed molecular mechanism of action has remained elusive. Here, we show that the eIF4E/eIF4G inhibitor 4EGI-1 acts allosterically by binding to a site on eIF4E distant from the eIF4G binding epitope. Data from NMR mapping and high-resolution crystal structures are congruent with this mechanism, where 4EGI-1 attaches to a hydrophobic pocket of eIF4E between β-sheet2 (L60-T68) and α-helix1 (E69-N77), causing localized conformational changes mainly in the H78-L85 region. It acts by unfolding a short 310-helix (S82-L85) while extending α-helix1 by one turn (H78-S82). This unusual helix rearrangement has not been seen in any previous eIF4E structure and reveals elements of an allosteric inhibition mechanism leading to the dislocation of eIF4G from eIF4E.


    Organizational Affiliation

    Laboratory for Translational Research, Harvard Medical School, Cambridge, MA 02139;,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115; gerhard_wagner@hms.harvard.edu.,Laboratory for Translational Research, Harvard Medical School, Cambridge, MA 02139;Rowland Institute, Harvard University, Cambridge, MA 02142.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115;Laboratory for Translational Research, Harvard Medical School, Cambridge, MA 02139;,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215;Jack and Pearl Resnick Campus, Albert Einstein College of Medicine, Bronx, NY 10461; and.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115;,Laboratory for Translational Research, Harvard Medical School, Cambridge, MA 02139;Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic translation initiation factor 4E
A, B
191Homo sapiensMutation(s): 0 
Gene Names: EIF4E (EIF4EL1, EIF4F)
Find proteins for P06730 (Homo sapiens)
Go to Gene View: EIF4E
Go to UniProtKB:  P06730
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
33R
Query on 33R

Download SDF File 
Download CCD File 
A
(2E)-2-{2-[4-(3,4-dichlorophenyl)-1,3-thiazol-2-yl]hydrazinylidene}-3-(2-nitrophenyl)propanoic acid
C18 H12 Cl2 N4 O4 S
KFRKRECSIYXARE-HYARGMPZSA-N
 Ligand Interaction
MGP
Query on MGP

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Download CCD File 
A, B
7-METHYL-GUANOSINE-5'-TRIPHOSPHATE
C11 H19 N5 O14 P3
DKVRNHPCAOHRSI-KQYNXXCUSA-O
 Ligand Interaction
MES
Query on MES

Download SDF File 
Download CCD File 
B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.172 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 39.340α = 90.00
b = 73.200β = 106.25
c = 65.720γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer InstituteUnited StatesCA68262

Revision History 

  • Version 1.0: 2014-08-13
    Type: Initial release
  • Version 1.1: 2014-10-01
    Type: Database references
  • Version 1.2: 2015-02-04
    Type: Derived calculations
  • Version 2.0: 2017-09-06
    Type: Advisory, Atomic model, Author supporting evidence, Database references, Derived calculations, Other, Source and taxonomy