2WGX

HUMAN P53 CORE DOMAIN MUTANT M133L-V203A-Y236F-N239Y-T253I-N268D


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Stabilising the DNA-Binding Domain of P53 by Rational Design of its Hydrophobic Core.

Khoo, K.H.Joerger, A.C.Freund, S.M.V.Fersht, A.R.

(2009) Protein Eng.Des.Sel. 22: 421

  • DOI: 10.1093/protein/gzp018

  • PubMed Abstract: 
  • The core domain of the tumour suppressor p53 is of inherently low thermodynamic stability and also low kinetic stability, which leads to rapid irreversible denaturation. Some oncogenic mutations of p53 act by just making the core domain thermosensiti ...

    The core domain of the tumour suppressor p53 is of inherently low thermodynamic stability and also low kinetic stability, which leads to rapid irreversible denaturation. Some oncogenic mutations of p53 act by just making the core domain thermosensitive, and so it is the target of novel anti-cancer drugs that bind to and stabilise the protein. Increasing the stability of the unstable core domain has also been crucial for biophysical and structural studies, in which a stabilised quadruple mutant (QM) is currently used. We generated an even more stabilised hexamutant (HM) by making two additional substitutions, Y236F and T253I, to the QM. The residues are found in the more stable paralogs p63 and p73 and stabilise the wild-type p53 core domain. We solved the structure of the HM core domain by X-ray crystallography at 1.75 A resolution. It has minimal structural changes from QM that affect the packing of hydrophobic core residues of the beta-sandwich. The full-length HM was also fully functional in DNA binding. HM was more stable than QM at 37 degrees C. Anomalies in biophysics and spectroscopy in urea-mediated denaturation curves of HM implied the accumulation of a folding intermediate, which may be related to those detected in kinetic experiments. The two additional mutations over-stabilise an unfolding intermediate. These results should be taken into consideration in drug design strategies for increasing the stability of temperature-sensitive mutants of p53.


    Related Citations: 
    • Crystal Structure of a Superstable Mutant of Human P53 Core Domain. Insights Into the Mechanism of Rescuing Oncogenic Mutations.
      Joerger, A.C.,Allen, M.D.,Fersht, A.R.
      (2004) J.Biol.Chem. 279: 1291


    Organizational Affiliation

    MRC Centre for Protein Engineering, Cambridge, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CELLULAR TUMOR ANTIGEN P53
A, B
219Homo sapiensMutation(s): 6 
Gene Names: TP53 (P53)
Find proteins for P04637 (Homo sapiens)
Go to Gene View: TP53
Go to UniProtKB:  P04637
Small Molecules
Ligands 1 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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.328α = 90.00
b = 71.075β = 90.00
c = 104.915γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-05-12
    Type: Initial release
  • Version 1.1: 2012-10-03
    Type: Derived calculations, Other, Refinement description, Structure summary, Version format compliance