3FGA

Structural Basis of PP2A and Sgo interaction


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 

wwPDB Validation   3D Report Full Report


This is version 2.0 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: https://doi.org/10.1016/j.molcel.2009.06.031
  • Primary Citation of Related Structures:  
    3FGA

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform588Mus musculusMutation(s): 0 
Gene Names: PP2APpp2r1asubunit A
UniProt
Find proteins for Q76MZ3 (Mus musculus)
Explore Q76MZ3 
Go to UniProtKB:  Q76MZ3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ76MZ3
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform403Homo sapiensMutation(s): 0 
Gene Names: KIAA0044PP2APPP2R5Csubunit B'
UniProt & NIH Common Fund Data Resources
Find proteins for Q13362 (Homo sapiens)
Explore Q13362 
Go to UniProtKB:  Q13362
PHAROS:  Q13362
GTEx:  ENSG00000078304 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13362
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform309Homo sapiensMutation(s): 1 
Gene Names: PP2APPP2CAsubunit c
EC: 3.1.3.16
UniProt & NIH Common Fund Data Resources
Find proteins for P67775 (Homo sapiens)
Explore P67775 
Go to UniProtKB:  P67775
PHAROS:  P67775
GTEx:  ENSG00000113575 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP67775
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Shugoshin-like 147Homo sapiensMutation(s): 0 
Gene Names: SGO1SGOL1
UniProt & NIH Common Fund Data Resources
Find proteins for Q5FBB7 (Homo sapiens)
Explore Q5FBB7 
Go to UniProtKB:  Q5FBB7
PHAROS:  Q5FBB7
GTEx:  ENSG00000129810 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5FBB7
Sequence Annotations
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
MICROCYSTIN-LR7Microcystis aeruginosaMutation(s): 0 
Sequence Annotations
Expand
  • Reference Sequence
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.94α = 90
b = 145.856β = 90
c = 294.153γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

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

Revision History  (Full details and data files)

  • Version 1.0: 2009-09-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2011-07-27
    Changes: Version format compliance
  • Version 1.3: 2012-12-12
    Changes: Other
  • Version 1.4: 2017-11-01
    Changes: Advisory, Refinement description
  • Version 1.5: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 2.0: 2023-11-15
    Changes: Atomic model, Data collection, Derived calculations