4PJW

crystal structure of human Stromal Antigen 2 (SA2) in complex with Sister Chromatid Cohesion protein 1 (Scc1), with bound MES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of cohesin subcomplex pinpoints direct shugoshin-Wapl antagonism in centromeric cohesion.

Hara, K.Zheng, G.Qu, Q.Liu, H.Ouyang, Z.Chen, Z.Tomchick, D.R.Yu, H.

(2014) Nat Struct Mol Biol 21: 864-870

  • DOI: 10.1038/nsmb.2880
  • Primary Citation of Related Structures:  
    4PK7, 4PJW, 4PJU

  • PubMed Abstract: 
  • Orderly termination of sister-chromatid cohesion during mitosis is critical for accurate chromosome segregation. During prophase, mitotic kinases phosphorylate cohesin and its protector sororin, triggering Wapl-dependent cohesin release from chromosome arms ...

    Orderly termination of sister-chromatid cohesion during mitosis is critical for accurate chromosome segregation. During prophase, mitotic kinases phosphorylate cohesin and its protector sororin, triggering Wapl-dependent cohesin release from chromosome arms. The shugoshin (Sgo1)-PP2A complex protects centromeric cohesin until its cleavage by separase at anaphase onset. Here, we report the crystal structure of a human cohesin subcomplex comprising SA2 and Scc1. Multiple HEAT repeats of SA2 form a dragon-shaped structure. Scc1 makes extensive contacts with SA2, with one binding hotspot. Sgo1 and Wapl compete for binding to a conserved site on SA2-Scc1. At this site, mutations of SA2 residues that disrupt Wapl binding bypass the Sgo1 requirement in cohesion protection. Thus, in addition to recruiting PP2A to dephosphorylate cohesin and sororin, Sgo1 physically shields cohesin from Wapl. This unexpected, direct antagonism between Sgo1 and Wapl augments centromeric cohesion protection.


    Organizational Affiliation

    1] Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA. [2] Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Texas, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cohesin subunit SA-2A981Homo sapiensMutation(s): 0 
Gene Names: STAG2SA2
Find proteins for Q8N3U4 (Homo sapiens)
Explore Q8N3U4 
Go to UniProtKB:  Q8N3U4
NIH Common Fund Data Resources
PHAROS:  Q8N3U4
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Double-strand-break repair protein rad21 homologB140Homo sapiensMutation(s): 0 
Gene Names: RAD21HR21KIAA0078NXP1SCC1
Find proteins for O60216 (Homo sapiens)
Explore O60216 
Go to UniProtKB:  O60216
NIH Common Fund Data Resources
PHAROS:  O60216
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MES
Query on MES

Download Ideal Coordinates CCD File 
C [auth A]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.733α = 90
b = 108.045β = 90
c = 180.835γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data collection

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
Cancer Prevention and Research Institute of Texas (CPRIT)United StatesRP110465
Welch FoundationUnited StatesI-1441

Revision History  (Full details and data files)

  • Version 1.0: 2014-08-27
    Type: Initial release
  • Version 1.1: 2014-09-17
    Changes: Database references
  • Version 1.2: 2014-10-15
    Changes: Database references
  • Version 1.3: 2019-11-20
    Changes: Advisory, Author supporting evidence, Derived calculations, Other, Source and taxonomy, Structure summary