3FGA

Structural Basis of PP2A and Sgo interaction


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structure and function of the PP2A-shugoshin interaction

Xu, Z.Cetin, B.Anger, M.Cho, U.S.Helmhart, W.Nasmyth, K.Xu, W.

(2009) Mol.Cell 35: 426-441

  • DOI: 10.1016/j.molcel.2009.06.031

  • PubMed Abstract: 
  • Accurate chromosome segregation during mitosis and meiosis depends on shugoshin proteins that prevent precocious dissociation of cohesin from centromeres. Shugoshins associate with PP2A, which is thought to dephosphorylate cohesin and thereby prevent ...

    Accurate chromosome segregation during mitosis and meiosis depends on shugoshin proteins that prevent precocious dissociation of cohesin from centromeres. Shugoshins associate with PP2A, which is thought to dephosphorylate cohesin and thereby prevent cleavage by separase during meiosis I. A crystal structure of a complex between a fragment of human Sgo1 and an AB'C PP2A holoenzyme reveals that Sgo1 forms a homodimeric parallel coiled coil that docks simultaneously onto PP2A's C and B' subunits. Sgo1 homodimerization is a prerequisite for PP2A binding. While hSgo1 interacts only with the AB'C holoenzymes, its relative, Sgo2, interacts with all PP2A forms and may thus lead to dephosphorylation of distinct substrates. Mutant shugoshin proteins defective in the binding of PP2A cannot protect centromeric cohesin from separase during meiosis I or support the spindle assembly checkpoint in yeast. Finally, we provide evidence that PP2A's recruitment to chromosomes may be sufficient to protect cohesin from separase in mammalian oocytes.


    Organizational Affiliation

    Department of Biological Structure, University of Washington, Seattle, WA 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform
A
588Mus musculusGene Names: Ppp2r1a
Find proteins for Q76MZ3 (Mus musculus)
Go to UniProtKB:  Q76MZ3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform
B
403Homo 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
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
Shugoshin-like 1
D
47Homo sapiensGene Names: SGOL1 (SGO1)
Find proteins for Q5FBB7 (Homo sapiens)
Go to UniProtKB:  Q5FBB7
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
MICROCYSTIN-LR
E
7N/AN/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
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000212
Query on PRD_000212
EMicrocystin LROligopeptide / Toxin

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.228 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 104.940α = 90.00
b = 145.856β = 90.00
c = 294.153γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
PHASERphasing
DENZOdata reduction
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-12-05 
  • Released Date: 2009-09-22 
  • Deposition Author(s): Xu, Z., Xu, W.

Revision History 

  • Version 1.0: 2009-09-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2011-07-27
    Type: Version format compliance
  • Version 1.3: 2012-12-12
    Type: Other
  • Version 1.4: 2017-11-01
    Type: Advisory, Refinement description