3KUJ

Crystal structure of C-terminal domain of PABPC1 in complex with binding region of eRF3a


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Molecular basis of eRF3 recognition by the MLLE domain of poly(A)-binding protein.

Kozlov, G.Gehring, K.

(2010) PLoS One 5: e10169-e10169

  • DOI: https://doi.org/10.1371/journal.pone.0010169
  • Primary Citation of Related Structures:  
    3KUI, 3KUJ

  • PubMed Abstract: 

    PABPC1 (cytosolic poly(A)-binding protein 1) is an RNA-binding protein that binds to the poly(A) tail of mRNAs to promote translation and mRNA turnover. In addition to RNA-binding domains, PABPC1 contains a unique protein-protein interaction domain, MLLE (also known as PABC) that binds regulatory proteins and translation factors that contain a conserved 12 amino acid peptide motif termed PAM2. Eukaryotic Release Factor 3 (eRF3/GSPT1) contains two overlapping PAM2 sequences, which are required for its activity. Here, we determined the crystal structures of the MLLE domain from PABPC1 in complex with the two PAM2 regions of eRF3. The structures reveal a mechanism of cooperativity between the two PAM2 sites that increases the binding affinity but prevents the binding of more than one molecule of eRF3 to PABPC1. Relative to previous structures, the high-resolution crystal structures force a re-evaluation of the PAM2 motif and improve our understanding of the molecular basis of MLLE peptide recognition.


  • Organizational Affiliation

    Department of Biochemistry, McGill University, Montréal, Québec, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polyadenylate-binding protein 188Homo sapiensMutation(s): 0 
Gene Names: PABPC1PAB1PABP1PABPC2
UniProt & NIH Common Fund Data Resources
Find proteins for P11940 (Homo sapiens)
Explore P11940 
Go to UniProtKB:  P11940
PHAROS:  P11940
GTEx:  ENSG00000070756 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11940
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
GSPT1 protein15Homo sapiensMutation(s): 0 
EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYD1 (Homo sapiens)
Explore Q8IYD1 
Go to UniProtKB:  Q8IYD1
PHAROS:  Q8IYD1
GTEx:  ENSG00000189369 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IYD1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.217α = 90
b = 50.802β = 90
c = 32.121γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-05-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description