2VSO

Crystal Structure of a Translation Initiation Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the Yeast Eif4A-Eif4G Complex: An RNA-Helicase Controlled by Protein-Protein Interactions.

Schutz, P.Bumann, M.Oberholzer, A.E.Bieniossek, C.Trachsel, H.Altmann, M.Baumann, U.

(2008) Proc.Natl.Acad.Sci.USA 105: 9564

  • DOI: 10.1073/pnas.0800418105
  • Primary Citation of Related Structures:  2VSX

  • PubMed Abstract: 
  • Translation initiation factors eIF4A and eIF4G form, together with the cap-binding factor eIF4E, the eIF4F complex, which is crucial for recruiting the small ribosomal subunit to the mRNA 5' end and for subsequent scanning and searching for the start ...

    Translation initiation factors eIF4A and eIF4G form, together with the cap-binding factor eIF4E, the eIF4F complex, which is crucial for recruiting the small ribosomal subunit to the mRNA 5' end and for subsequent scanning and searching for the start codon. eIF4A is an ATP-dependent RNA helicase whose activity is stimulated by binding to eIF4G. We report here the structure of the complex formed by yeast eIF4G's middle domain and full-length eIF4A at 2.6-A resolution. eIF4A shows an extended conformation where eIF4G holds its crucial DEAD-box sequence motifs in a productive conformation, thus explaining the stimulation of eIF4A's activity. A hitherto undescribed interaction involves the amino acid Trp-579 of eIF4G. Mutation to alanine results in decreased binding to eIF4A and a temperature-sensitive phenotype of yeast cells that carry a Trp579Ala mutation as its sole source for eIF4G. Conformational changes between eIF4A's closed and open state provide a model for its RNA-helicase activity.


    Organizational Affiliation

    Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-DEPENDENT RNA HELICASE EIF4A
A, B
395Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: TIF1, TIF2 (TIF41A, TIF41B)
EC: 3.6.4.13
Find proteins for P10081 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P10081
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
EUKARYOTIC INITIATION FACTOR 4F SUBUNIT P150
E, F
284Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: TIF4631
Find proteins for P39935 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P39935
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMP
Query on AMP

Download SDF File 
Download CCD File 
A, B
ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.214 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 69.260α = 91.70
b = 69.800β = 102.01
c = 101.970γ = 115.30
Software Package:
Software NamePurpose
XSCALEdata scaling
PHENIXrefinement
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance