2IXN

CRYSTAL STRUCTURE OF THE PP2A PHOSPHATASE ACTIVATOR Ypa2 PTPA2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of the Pp2A Phosphatase Activator: Implications for its Pp2A-Specific Ppiase Activity

Leulliot, N.Vicentini, G.Jordens, J.Quevillon-Cheruel, S.Schiltz, M.Barford, D.Van Tilbeurgh, H.Goris, J.

(2006) Mol.Cell 23: 413

  • DOI: 10.1016/j.molcel.2006.07.008
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • PTPA, an essential and specific activator of protein phosphatase 2A (PP2A), functions as a peptidyl prolyl isomerase (PPIase). We present here the crystal structures of human PTPA and of the two yeast orthologs (Ypa1 and Ypa2), revealing an all alpha ...

    PTPA, an essential and specific activator of protein phosphatase 2A (PP2A), functions as a peptidyl prolyl isomerase (PPIase). We present here the crystal structures of human PTPA and of the two yeast orthologs (Ypa1 and Ypa2), revealing an all alpha-helical protein fold that is radically different from other PPIases. The protein is organized into two domains separated by a groove lined by highly conserved residues. To understand the molecular mechanism of PTPA activity, Ypa1 was cocrystallized with a proline-containing PPIase peptide substrate. In the complex, the peptide binds at the interface of a peptide-induced dimer interface. Conserved residues of the interdomain groove contribute to the peptide binding site and dimer interface. Structure-guided mutational studies showed that in vivo PTPA activity is influenced by mutations on the surface of the peptide binding pocket, the same mutations that also influenced the in vitro activation of PP2Ai and PPIase activity.


    Organizational Affiliation

    Institut de Biochimie et de Biophysique Moléculaire et Cellulaire, UMR8619, Bât 430, Université de Paris-Sud, 91405 Orsay Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERINE/THREONINE-PROTEIN PHOSPHATASE 2A ACTIVATOR 2
A, B
310Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RRD2 (NOH1, YPA2)
EC: 5.2.1.8
Find proteins for Q12461 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12461
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.199 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 157.930α = 90.00
b = 171.042β = 90.00
c = 53.735γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
HYSSphasing
PHENIXphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-31
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance