1WAO

PP5 structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Basis for Tpr Domain-Mediated Regulation of Protein Phosphatase 5

Yang, J.Roe, S.M.Cliff, M.J.Williams, M.A.Ladbury, J.E.Cohen, P.T.Barford, D.

(2005) Embo J. 24: 1

  • DOI: 10.1038/sj.emboj.7600496

  • PubMed Abstract: 
  • Protein phosphatase 5 (Ppp5) is a serine/threonine protein phosphatase comprising a regulatory tetratricopeptide repeat (TPR) domain N-terminal to its phosphatase domain. Ppp5 functions in signalling pathways that control cellular responses to stress ...

    Protein phosphatase 5 (Ppp5) is a serine/threonine protein phosphatase comprising a regulatory tetratricopeptide repeat (TPR) domain N-terminal to its phosphatase domain. Ppp5 functions in signalling pathways that control cellular responses to stress, glucocorticoids and DNA damage. Its phosphatase activity is suppressed by an autoinhibited conformation maintained by the TPR domain and a C-terminal subdomain. By interacting with the TPR domain, heat shock protein 90 (Hsp90) and fatty acids including arachidonic acid stimulate phosphatase activity. Here, we describe the structure of the autoinhibited state of Ppp5, revealing mechanisms of TPR-mediated phosphatase inhibition and Hsp90- and arachidonic acid-induced stimulation of phosphatase activity. The TPR domain engages with the catalytic channel of the phosphatase domain, restricting access to the catalytic site. This autoinhibited conformation of Ppp5 is stabilised by the C-terminal alphaJ helix that contacts a region of the Hsp90-binding groove on the TPR domain. Hsp90 activates Ppp5 by disrupting TPR-phosphatase domain interactions, permitting substrate access to the constitutively active phosphatase domain, whereas arachidonic acid prompts an alternate conformation of the TPR domain, destabilising the TPR-phosphatase domain interface.


    Organizational Affiliation

    Section of Structural Biology, The Institute of Cancer Research, Chester Beatty Laboratories, London, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERINE/THREONINE PROTEIN PHOSPHATASE 5
1, 2, 3, 4
477Homo sapiensGene Names: PPP5C (PPP5)
EC: 3.1.3.16
Find proteins for P53041 (Homo sapiens)
Go to Gene View: PPP5C
Go to UniProtKB:  P53041
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
1, 2, 3, 4
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.247 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.740α = 90.00
b = 117.540β = 93.79
c = 200.410γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CNSphasing
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2004-10-27 
  • Released Date: 2005-02-22 
  • Deposition Author(s): Barford, D.

Revision History 

  • Version 1.0: 2005-02-22
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance