2O8A

rat PP1cgamma complexed with mouse inhibitor-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for regulation of protein phosphatase 1 by inhibitor-2.

Hurley, T.D.Yang, J.Zhang, L.Goodwin, K.D.Zou, Q.Cortese, M.Dunker, A.K.Depaoli-Roach, A.A.

(2007) J.Biol.Chem. 282: 28874-28883

  • DOI: 10.1074/jbc.M703472200
  • Primary Citation of Related Structures:  2O8G

  • PubMed Abstract: 
  • The functional specificity of type 1 protein phosphatases (PP1) depends on the associated regulatory/targeting and inhibitory subunits. To gain insights into the mechanism of PP1 regulation by inhibitor-2, an ancient and intrinsically disordered regu ...

    The functional specificity of type 1 protein phosphatases (PP1) depends on the associated regulatory/targeting and inhibitory subunits. To gain insights into the mechanism of PP1 regulation by inhibitor-2, an ancient and intrinsically disordered regulator, we solved the crystal structure of the complex to 2.5A resolution. Our studies show that, when complexed with PP1c, I-2 acquires three regions of order: site 1, residues 12-17, binds adjacent to a region recognized by many PP1 regulators; site 2, amino acids 44-56, interacts along the RVXF binding groove through an unsuspected sequence, KSQKW; and site 3, residues 130-169, forms alpha-helical regions that lie across the substrate-binding cleft. Specifically, residues 148-151 interact at the catalytic center, displacing essential metal ions, accounting for both rapid inhibition and slower inactivation of PP1c. Thus, our structure provides novel insights into the mechanism of PP1 inhibition and subsequent reactivation, has broad implications for the physiological regulation of PP1, and highlights common inhibitory interactions among phosphoprotein phosphatase family members.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA. thurley@iupui.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase PP1-gamma catalytic subunit
A, B
329Rattus norvegicusGene Names: Ppp1cc
EC: 3.1.3.16
Find proteins for P63088 (Rattus norvegicus)
Go to UniProtKB:  P63088
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein phosphatase inhibitor 2
I, J
206Mus musculusGene Names: Ppp1r2
Find proteins for Q9DCL8 (Mus musculus)
Go to UniProtKB:  Q9DCL8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 95.462α = 90.00
b = 103.807β = 90.00
c = 151.381γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
AMoREphasing
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-12-12 
  • Released Date: 2007-07-17 
  • Deposition Author(s): Hurley, T.D.

Revision History 

  • Version 1.0: 2007-07-17
    Type: Initial release
  • Version 1.1: 2007-10-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description