4F02

Crystal structure of the PABP-binding site of eIF4G in complex with RRM1-2 of PABP and poly(A)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Interdomain Allostery Promotes Assembly of the Poly(A) mRNA Complex with PABP and eIF4G.

Safaee, N.Kozlov, G.Noronha, A.M.Xie, J.Wilds, C.J.Gehring, K.

(2012) Mol Cell 48: 375-386

  • DOI: 10.1016/j.molcel.2012.09.001
  • Primary Citation of Related Structures:  
    4F02, 4F25, 4F26

  • PubMed Abstract: 
  • Many RNA-binding proteins contain multiple single-strand nucleic acid-binding domains and assemble into large multiprotein messenger ribonucleic acid protein (mRNP) complexes. The mechanisms underlying the self-assembly of these complexes are largely unknown ...

    Many RNA-binding proteins contain multiple single-strand nucleic acid-binding domains and assemble into large multiprotein messenger ribonucleic acid protein (mRNP) complexes. The mechanisms underlying the self-assembly of these complexes are largely unknown. In eukaryotes, the association of the translation factors polyadenylate-binding protein-1 (PABP) and eIF4G is essential for high-level expression of polyadenylated mRNAs. Here, we report the crystal structure of the ternary complex poly(A)(11)·PABP(1-190)·eIF4G(178-203) at 2.0 Å resolution. Our NMR and crystallographic data show that eIF4G interacts with the RRM2 domain of PABP. Analysis of the interaction by small-angle X-ray scattering, isothermal titration calorimetry, and electromobility shift assays reveals that this interaction is allosterically regulated by poly(A) binding to PABP. Furthermore, we have confirmed the importance of poly(A) for the endogenous PABP and eIF4G interaction in immunoprecipitation experiments using HeLa cell extracts. Our findings reveal interdomain allostery as a mechanism for cooperative assembly of RNP complexes.


    Organizational Affiliation

    Department of Biochemistry, McGill University, Montréal, QC H3G 0B1, Canada.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polyadenylate-binding protein 1A, D213Homo sapiensMutation(s): 0 
Gene Names: PABPC1PAB1PABP1PABPC2
Find proteins for P11940 (Homo sapiens)
Explore P11940 
Go to UniProtKB:  P11940
NIH Common Fund Data Resources
PHAROS:  P11940
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 4 gamma 1C, F27Homo sapiensMutation(s): 0 
Gene Names: EIF4G1EIF4FEIF4GEIF4GI
Find proteins for Q04637 (Homo sapiens)
Explore Q04637 
Go to UniProtKB:  Q04637
NIH Common Fund Data Resources
PHAROS:  Q04637
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    RNA (5'-R(*AP*AP*AP*AP*AP*AP*AP*AP*AP*AP*A)-3')B, E11N/A
    Protein Feature View
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    • Reference Sequence
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.00 Å
    • R-Value Free: 0.230 
    • R-Value Work: 0.204 
    • R-Value Observed: 0.205 
    • Space Group: P 4 21 2
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 130.191α = 90
    b = 130.191β = 90
    c = 86.872γ = 90
    Software Package:
    Software NamePurpose
    MxDCdata collection
    PHASERphasing
    REFMACrefinement
    HKL-2000data reduction
    HKL-2000data scaling

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History  (Full details and data files)

    • Version 1.0: 2012-08-08
      Type: Initial release
    • Version 1.1: 2013-01-02
      Changes: Database references
    • Version 1.2: 2017-11-15
      Changes: Advisory, Refinement description