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 
  • R-Value Observed: 0.218 

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:  
    2O8A, 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase PP1-gamma catalytic subunitAB329Rattus norvegicusMutation(s): 0 
Gene Names: Ppp1cc
EC: 3.1.3.16
Find proteins for P63088 (Rattus norvegicus)
Explore P63088 
Go to UniProtKB:  P63088
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein phosphatase inhibitor 2IJ206Mus musculusMutation(s): 0 
Gene Names: Ppp1r2
Find proteins for Q9DCL8 (Mus musculus)
Explore Q9DCL8 
Go to UniProtKB:  Q9DCL8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.218 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.462α = 90
b = 103.807β = 90
c = 151.381γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
AMoREphasing

Structure Validation

View Full Validation Report



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
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description