1RF8

Solution structure of the yeast translation initiation factor eIF4E in complex with m7GDP and eIF4GI residues 393 to 490


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 11 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Ribosome loading onto the mRNA cap is driven by conformational coupling between eIF4G and eIF4E.

Gross, J.D.Moerke, N.J.von der Haar, T.Lugovskoy, A.A.Sachs, A.B.McCarthy, J.E.Wagner, G.

(2003) Cell 115: 739-750


  • PubMed Abstract: 
  • The eukaryotic initiation factor 4G (eIF4G) is the core of a multicomponent switch controlling gene expression at the level of translation initiation. It interacts with the small ribosomal subunit interacting protein, eIF3, and the eIF4E/cap-mRNA com ...

    The eukaryotic initiation factor 4G (eIF4G) is the core of a multicomponent switch controlling gene expression at the level of translation initiation. It interacts with the small ribosomal subunit interacting protein, eIF3, and the eIF4E/cap-mRNA complex in order to load the ribosome onto mRNA during cap-dependent translation. We describe the solution structure of the complex between yeast eIF4E/cap and eIF4G (393-490). Binding triggers a coupled folding transition of eIF4G (393-490) and the eIF4E N terminus resulting in a molecular bracelet whereby eIF4G (393-490) forms a right-handed helical ring that wraps around the N terminus of eIF4E. Cofolding allosterically enhances association of eIF4E with the cap and is required for maintenance of optimal growth and polysome distributions in vivo. Our data explain how mRNA, eIF4E, and eIF4G exists as a stable mRNP that may facilitate multiple rounds of ribosomal loading during translation initiation, a key determinant in the overall rate of protein synthesis.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic translation initiation factor 4E
A
213Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: CDC33 (TIF45)
Find proteins for P07260 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P07260
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic initiation factor 4F subunit p150
B
100Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: TIF4631
Find proteins for P39935 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P39935
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MTN
Query on MTN

Download SDF File 
Download CCD File 
A
S-[(1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)methyl] methanesulfonothioate
MTSL
C10 H18 N O3 S2
MXZPGYFBZHBAQM-UHFFFAOYSA-N
 Ligand Interaction
M7G
Query on M7G

Download SDF File 
Download CCD File 
A
7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE
C11 H19 N5 O11 P2
QQODJOAVWUWVHJ-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 11 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 1RF8 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance