3ZME

Structure of the p53 core domain mutant Y220C bound to the small molecule PhiKan7242


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Small molecule induced reactivation of mutant p53 in cancer cells.

Liu, X.Wilcken, R.Joerger, A.C.Chuckowree, I.S.Amin, J.Spencer, J.Fersht, A.R.

(2013) Nucleic Acids Res. 41: 6034-6044

  • DOI: 10.1093/nar/gkt305

  • PubMed Abstract: 
  • The p53 cancer mutant Y220C is an excellent paradigm for rescuing the function of conformationally unstable p53 mutants because it has a unique surface crevice that can be targeted by small-molecule stabilizers. Here, we have identified a compound, P ...

    The p53 cancer mutant Y220C is an excellent paradigm for rescuing the function of conformationally unstable p53 mutants because it has a unique surface crevice that can be targeted by small-molecule stabilizers. Here, we have identified a compound, PK7088, which is active in vitro: PK7088 bound to the mutant with a dissociation constant of 140 μM and raised its melting temperature, and we have determined the binding mode of a close structural analogue by X-ray crystallography. We showed that PK7088 is biologically active in cancer cells carrying the Y220C mutant by a battery of tests. PK7088 increased the amount of folded mutant protein with wild-type conformation, as monitored by immunofluorescence, and restored its transcriptional functions. It induced p53-Y220C-dependent growth inhibition, cell-cycle arrest and apoptosis. Most notably, PK7088 increased the expression levels of p21 and the proapoptotic NOXA protein. PK7088 worked synergistically with Nutlin-3 on up-regulating p21 expression, whereas Nutlin-3 on its own had no effect, consistent with its mechanism of action. PK7088 also restored non-transcriptional apoptotic functions of p53 by triggering nuclear export of BAX to the mitochondria. We suggest a set of criteria for assigning activation of p53.


    Related Citations: 
    • Structural Basis for Understanding Oncogenic P53 Mutations and Designing Rescue Drugs.
      Joerger, A.C.,Ang, H.C.,Fersht, A.R.
      (2006) Proc.Natl.Acad.Sci.USA 103: 15056


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cellular tumor antigen p53
A, B
219Homo sapiensMutation(s): 5 
Gene Names: TP53 (P53)
Find proteins for P04637 (Homo sapiens)
Go to Gene View: TP53
Go to UniProtKB:  P04637
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
QC5
Query on QC5

Download SDF File 
Download CCD File 
A, B
2-(4-(4-fluorophenyl)-5-(1H-pyrrol-1-yl)-1H-pyrazol-1-yl)-N,N-dimethylethanamine
C17 H19 F N4
ZCQVHVWVDAEXBJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.155 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.138α = 90.00
b = 71.023β = 90.00
c = 105.324γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-08
    Type: Initial release
  • Version 1.1: 2013-05-15
    Type: Database references, Source and taxonomy
  • Version 1.2: 2013-07-17
    Type: Database references
  • Version 1.3: 2018-12-12
    Type: Data collection, Database references, Source and taxonomy, Structure summary