2NPP

Structure of the Protein Phosphatase 2A Holoenzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.260 

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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:  
    2NPP, 2NYM, 2NYL

  • 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 subunit. Here we report the crystal structure of the heterotrimeric PP2A holoenzyme involving the regulatory subunit B'/B56/PR61 ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein Phosphatase 2, regulatory subunit A (PR 65), alpha isoformA, D589Homo sapiensMutation(s): 0 
Gene Names: PPP2R1A
Find proteins for P30153 (Homo sapiens)
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Go to UniProtKB:  P30153
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PHAROS:  P30153
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoformB, E449Homo sapiensMutation(s): 0 
Gene Names: PPP2R5CKIAA0044
Find proteins for Q13362 (Homo sapiens)
Explore Q13362 
Go to UniProtKB:  Q13362
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PHAROS:  Q13362
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoformC, F309Homo sapiensMutation(s): 0 
Gene Names: PPP2CA
EC: 3.1.3.16
Find proteins for P67775 (Homo sapiens)
Explore P67775 
Go to UniProtKB:  P67775
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PHAROS:  P67775
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
microcystin LRG [auth X], H [auth Y]7CyanobacteriaMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download Ideal Coordinates CCD File 
I [auth C], J [auth C], K [auth F], L [auth F]MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 4
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000212
Query on PRD_000212
G [auth X], H [auth Y]Microcystin LROligopeptide /  Toxin

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.260 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.26α = 90
b = 159.05β = 90
c = 269.17γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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