6WJH

Crystal structure of MAGE-A11 bound to the PCF11 degron

  • Classification: LIGASE
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): No 

  • Deposited: 2020-04-13 Released: 2020-10-14 
  • Deposition Author(s): Miller, D.J., Huang, X.
  • Funding Organization(s): National Institutes of Health/National Cancer Institute (NIH/NCI)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 

wwPDB Validation 3D Report Full Report



Literature

Structural basis for substrate recognition and chemical inhibition of oncogenic MAGE ubiquitin ligases.

Yang, S.W.Huang, X.Lin, W.Min, J.Miller, D.J.Mayasundari, A.Rodrigues, P.Griffith, E.C.Gee, C.T.Li, L.Li, W.Lee, R.E.Rankovic, Z.Chen, T.Potts, P.R.

(2020) Nat Commun 11: 4931-4931

  • DOI: 10.1038/s41467-020-18708-x
  • Primary Citation of Related Structures:  
    6WJH

  • PubMed Abstract: 
  • Testis-restricted melanoma antigen (MAGE) proteins are frequently hijacked in cancer and play a critical role in tumorigenesis. MAGEs assemble with E3 ubiquitin ligases and function as substrate adaptors that direct the ubiquitination of novel target ...

    Testis-restricted melanoma antigen (MAGE) proteins are frequently hijacked in cancer and play a critical role in tumorigenesis. MAGEs assemble with E3 ubiquitin ligases and function as substrate adaptors that direct the ubiquitination of novel targets, including key tumor suppressors. However, how MAGEs recognize their targets is unknown and has impeded the development of MAGE-directed therapeutics. Here, we report the structural basis for substrate recognition by MAGE ubiquitin ligases. Biochemical analysis of the degron motif recognized by MAGE-A11 and the crystal structure of MAGE-A11 bound to the PCF11 substrate uncovered a conserved substrate binding cleft (SBC) in MAGEs. Mutation of the SBC disrupted substrate recognition by MAGEs and blocked MAGE-A11 oncogenic activity. A chemical screen for inhibitors of MAGE-A11:substrate interaction identified 4-Aminoquinolines as potent inhibitors of MAGE-A11 that show selective cytotoxicity. These findings provide important insights into the large family of MAGE ubiquitin ligases and identify approaches for developing cancer-specific therapeutics.


    Organizational Affiliation

    Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Pl, Memphis, TN, 38105, USA. Ryan.Potts@stjude.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fusion protein of PCF11 and MAGE-A11ABCD243Homo sapiensMutation(s): 0 
Gene Names: PCF11KIAA0824
Find proteins for P43364 (Homo sapiens)
Explore P43364 
Go to UniProtKB:  P43364
NIH Common Fund Data Resources
PHAROS  P43364
Find proteins for O94913 (Homo sapiens)
Explore O94913 
Go to UniProtKB:  O94913
NIH Common Fund Data Resources
PHAROS  O94913
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.493α = 77.44
b = 78.195β = 77.34
c = 72.911γ = 89.59
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United States181691010

Revision History 

  • Version 1.0: 2020-10-14
    Type: Initial release