Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 45.86 kDa 
• Atom Count: 2693 
• Modelled Residue Count: 327 
• Deposited Residue Count: 392 
• Unique protein chains: 1

2JAK

Human PP2A regulatory subunit B56g

• PDB DOI: 10.2210/pdb2JAK/pdb

• Classification: NUCLEAR PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-11-29 Released: 2006-12-04 
• Deposition Author(s): Magnusdottir, A., Stenmark, P., Arrowsmith, C., Berglund, H., Busam, R., Collins, R., Edwards, A., Ericsson, U.B., Flodin, S., Flores, A., Graslund, S., Hammarstrom, M., Hallberg, B.M., Holmberg Schiavone, L., Hogbom, M., Johansson, I., Karlberg, T., Kotenyova, T., Lundgren, S., Moche, M., Nilsson, P., Nyman, T., Ogg, D., Persson, C., Sagemark, J., Sundstrom, M., Uppenberg, J., Upsten, M., Thorsell, A.G., Van Den Berg, S., Weigelt, J., Nordlund, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.260 
• R-Value Work: 0.214 
• R-Value Observed: 0.216 

Literature

The Structure of the Pp2A Regulatory Subunit B56 Gamma: The Remaining Piece of the Pp2A Jigsaw Puzzle.

Magnusdottir, A., Stenmark, P., Flodin, S., Nyman, T., Kotenyova, T., Graslund, S., Ogg, D., Nordlund, P.

(2009) Proteins 74: 212

• PubMed: 18618707 
• DOI: 10.1002/prot.22150
• Primary Citation of Related Structures:  
  2JAK


• PubMed Abstract: 
  

The PP2A serine/threonine phosphatase regulates a plethora of cellular processes. In the cell the predominant form of the enzyme is a heterotrimer, formed by a core dimer composed of a catalytic and a scaffolding subunit, which assemble together with one of a range of different regulatory B subunits. Here, we present the first structure of a free non-complexed B subunit, B56 gamma. Comparison with the recent structures of a heterotrimeric complex and the core dimer reveals several significant conformational changes in the interface region between the B56 gamma and the core dimer. These allow for an assembly scheme of the PP2A holoenzyme to be put forth where B56 gamma first complexes with the scaffolding subunit and subsequently binds to the catalytic subunit and this induces the formation of a binding site for the invariant C-terminus of the catalytic subunit that locks in the complex as a last step of assembly.

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Organizational Affiliation: 

Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SERINE/THREONINE-PROTEIN PHOSPHATASE 2A 56 KDA REGULATORY SUBUNIT GAMMA ISOFORM	A	392	Homo sapiens	Mutation(s): 0  Gene Names: PPP2R5C, KIAA0044
UniProt & NIH Common Fund Data Resources
Find proteins for Q13362 (Homo sapiens) Explore Q13362  Go to UniProtKB:  Q13362
PHAROS:  Q13362

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.260 
• R-Value Work: 0.214 
• R-Value Observed: 0.216 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 105.8	α = 90
b = 105.8	β = 90
c = 82.1	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
SOLVE/RESOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-11-29 
• Released Date: 2006-12-04 
Deposition Author(s): Magnusdottir, A., Stenmark, P., Arrowsmith, C., Berglund, H., Busam, R., Collins, R., Edwards, A., Ericsson, U.B., Flodin, S., Flores, A., Graslund, S., Hammarstrom, M., Hallberg, B.M., Holmberg Schiavone, L., Hogbom, M., Johansson, I., Karlberg, T., Kotenyova, T., Lundgren, S., Moche, M., Nilsson, P., Nyman, T., Ogg, D., Persson, C., Sagemark, J., Sundstrom, M., Uppenberg, J., Upsten, M., Thorsell, A.G., Van Den Berg, S., Weigelt, J., Nordlund, P.

Revision History  

• Version 1.0: 2006-12-04
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance