3KUI

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1371/journal.pone.0010169
  • Primary Citation of Related Structures:  

  • 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, ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polyadenylate-binding protein 1
A
88Homo sapiensMutation(s): 0 
Gene Names: PABPC1 (PAB1, PABP1, PABPC2)
Find proteins for P11940 (Homo sapiens)
Go to Gene View: PABPC1
Go to UniProtKB:  P11940
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
GSPT1 protein
B
15Homo sapiensMutation(s): 0 
Gene Names: GSPT1 (ERF3A)
Find proteins for P15170 (Homo sapiens)
Go to Gene View: GSPT1
Go to UniProtKB:  P15170
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.247 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 37.432α = 90.00
b = 63.631β = 90.00
c = 32.226γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CrystalCleardata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance