4MEW

Structure of the core fragment of human PR70


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.993 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.162 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and Biochemical Characterization of Human PR70 in Isolation and in Complex with the Scaffolding Subunit of Protein Phosphatase 2A.

Dovega, R.Tsutakawa, S.Quistgaard, E.M.Anandapadamanaban, M.Low, C.Nordlund, P.

(2014) Plos One 9: e101846-e101846

  • DOI: 10.1371/journal.pone.0101846

  • PubMed Abstract: 
  • Protein Phosphatase 2A (PP2A) is a major Ser/Thr phosphatase involved in the regulation of various cellular processes. PP2A assembles into diverse trimeric holoenzymes, which consist of a scaffolding (A) subunit, a catalytic (C) subunit and various r ...

    Protein Phosphatase 2A (PP2A) is a major Ser/Thr phosphatase involved in the regulation of various cellular processes. PP2A assembles into diverse trimeric holoenzymes, which consist of a scaffolding (A) subunit, a catalytic (C) subunit and various regulatory (B) subunits. Here we report a 2.0 Å crystal structure of the free B''/PR70 subunit and a SAXS model of an A/PR70 complex. The crystal structure of B''/PR70 reveals a two domain elongated structure with two Ca2+ binding EF-hands. Furthermore, we have characterized the interaction of both binding partner and their calcium dependency using biophysical techniques. Ca2+ biophysical studies with Circular Dichroism showed that the two EF-hands display different affinities to Ca2+. In the absence of the catalytic C-subunit, the scaffolding A-subunit remains highly mobile and flexible even in the presence of the B''/PR70 subunit as judged by SAXS. Isothermal Titration Calorimetry studies and SAXS data support that PR70 and the A-subunit have high affinity to each other. This study provides additional knowledge about the structural basis for the function of B'' containing holoenzymes.


    Organizational Affiliation

    Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit beta
A
356Homo sapiensMutation(s): 0 
Gene Names: PPP2R3B (PPP2R3L)
Find proteins for Q9Y5P8 (Homo sapiens)
Go to Gene View: PPP2R3B
Go to UniProtKB:  Q9Y5P8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.993 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.162 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 37.110α = 90.00
b = 74.460β = 92.63
c = 62.330γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-08-13
    Type: Initial release