6R7O

Crystal structure of the central region of human cohesin subunit STAG1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

STAG1 vulnerabilities for exploiting cohesin synthetic lethality in STAG2-deficient cancers.

van der Lelij, P.Newman, J.A.Lieb, S.Jude, J.Katis, V.Hoffmann, T.Hinterndorfer, M.Bader, G.Kraut, N.Pearson, M.A.Peters, J.M.Zuber, J.Gileadi, O.Petronczki, M.

(2020) Life Sci Alliance 3

  • DOI: 10.26508/lsa.202000725
  • Primary Citation of Related Structures:  
    6QB5, 6R7O, 6RRK, 6RRC

  • PubMed Abstract: 
  • The cohesin subunit STAG2 has emerged as a recurrently inactivated tumor suppressor in human cancers. Using candidate approaches, recent studies have revealed a synthetic lethal interaction between STAG2 and its paralog STAG1 T ...

    The cohesin subunit STAG2 has emerged as a recurrently inactivated tumor suppressor in human cancers. Using candidate approaches, recent studies have revealed a synthetic lethal interaction between STAG2 and its paralog STAG1 To systematically probe genetic vulnerabilities in the absence of STAG2, we have performed genome-wide CRISPR screens in isogenic cell lines and identified STAG1 as the most prominent and selective dependency of STAG2-deficient cells. Using an inducible degron system, we show that chemical genetic degradation of STAG1 protein results in the loss of sister chromatid cohesion and rapid cell death in STAG2-deficient cells, while sparing STAG2 -wild-type cells. Biochemical assays and X-ray crystallography identify STAG1 regions that interact with the RAD21 subunit of the cohesin complex. STAG1 mutations that abrogate this interaction selectively compromise the viability of STAG2 -deficient cells. Our work highlights the degradation of STAG1 and inhibition of its interaction with RAD21 as promising therapeutic strategies. These findings lay the groundwork for the development of STAG1-directed small molecules to exploit synthetic lethality in STAG2 -mutated tumors.


    Organizational Affiliation

    Boehringer Ingelheim Regional Center Vienna (RCV) GmbH & Co KG, Vienna, Austria mark_paul.petronczki@boehringer-ingelheim.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cohesin subunit SA-1 AB459Homo sapiensMutation(s): 0 
Gene Names: STAG1SA1SCC3
Find proteins for Q8WVM7 (Homo sapiens)
Explore Q8WVM7 
Go to UniProtKB:  Q8WVM7
NIH Common Fund Data Resources
PHAROS:  Q8WVM7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 154.654α = 90
b = 166.718β = 90
c = 46.878γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DIALSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom--

Revision History 

  • Version 1.0: 2019-04-10
    Type: Initial release
  • Version 1.1: 2019-07-10
    Changes: Data collection
  • Version 1.2: 2020-08-19
    Changes: Database references