2NPP

Structure of the Protein Phosphatase 2A Holoenzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.255 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structure of the protein phosphatase 2A holoenzyme

Xu, Y.Xing, Y.Chen, Y.Chao, Y.Lin, Z.Fan, E.Yu, J.W.Strack, S.Jeffrey, P.D.Shi, Y.

(2006) Cell 127: 1239-1251

  • DOI: 10.1016/j.cell.2006.11.033
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein Phosphatase 2A (PP2A) plays an essential role in many aspects of cellular physiology. The PP2A holoenzyme consists of a heterodimeric core enzyme, which comprises a scaffolding subunit and a catalytic subunit, and a variable regulatory subuni ...

    Protein Phosphatase 2A (PP2A) plays an essential role in many aspects of cellular physiology. The PP2A holoenzyme consists of a heterodimeric core enzyme, which comprises a scaffolding subunit and a catalytic subunit, and a variable regulatory subunit. Here we report the crystal structure of the heterotrimeric PP2A holoenzyme involving the regulatory subunit B'/B56/PR61. Surprisingly, the B'/PR61 subunit has a HEAT-like (huntingtin-elongation-A subunit-TOR-like) repeat structure, similar to that of the scaffolding subunit. The regulatory B'/B56/PR61 subunit simultaneously interacts with the catalytic subunit as well as the conserved ridge of the scaffolding subunit. The carboxyterminus of the catalytic subunit recognizes a surface groove at the interface between the B'/B56/PR61 subunit and the scaffolding subunit. Compared to the scaffolding subunit in the PP2A core enzyme, formation of the holoenzyme forces the scaffolding subunit to undergo pronounced conformational rearrangements. This structure reveals significant ramifications for understanding the function and regulation of PP2A.


    Organizational Affiliation

    Department of Molecular Biology, Lewis Thomas Laboratory, Princeton University, Princeton, NJ 08544, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Phosphatase 2, regulatory subunit A (PR 65), alpha isoform
A, D
589Homo sapiensGene Names: PPP2R1A
Find proteins for P30153 (Homo sapiens)
Go to Gene View: PPP2R1A
Go to UniProtKB:  P30153
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform
B, E
449Homo sapiensGene Names: PPP2R5C (KIAA0044)
Find proteins for Q13362 (Homo sapiens)
Go to Gene View: PPP2R5C
Go to UniProtKB:  Q13362
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform
C, F
309Homo sapiensGene Names: PPP2CA
EC: 3.1.3.16
Find proteins for P67775 (Homo sapiens)
Go to Gene View: PPP2CA
Go to UniProtKB:  P67775
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
microcystin LR
X, Y
7N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
C, F
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000212
Query on PRD_000212
X,YMicrocystin LROligopeptide / Toxin

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.255 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 109.260α = 90.00
b = 159.050β = 90.00
c = 269.170γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
CNSphasing
DENZOdata reduction
CBASSdata collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-12-12
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-07-27
    Type: Database references, Derived calculations, Non-polymer description
  • Version 1.4: 2013-02-27
    Type: Other