5MXO

Crystal structure of 14-3-3sigma and a p53 C-terminal 12-mer synthetic phosphopeptide stabilized by Fusicoccin-A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 

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Ligand Structure Quality Assessment 


This is version 2.0 of the entry. See complete history


Literature

Small-molecule stabilization of the p53 - 14-3-3 protein-protein interaction.

Doveston, R.G.Kuusk, A.Andrei, S.A.Leysen, S.Cao, Q.Castaldi, M.P.Hendricks, A.Brunsveld, L.Chen, H.Boyd, H.Ottmann, C.

(2017) FEBS Lett 591: 2449-2457

  • DOI: 10.1002/1873-3468.12723
  • Primary Citation of Related Structures:  
    5MHC, 5MOC, 5MXO

  • PubMed Abstract: 
  • 14-3-3 proteins are positive regulators of the tumor suppressor p53, the mutation of which is implicated in many human cancers. Current strategies for targeting of p53 involve restoration of wild-type function or inhibition of the interaction with MDM2, its key negative regulator ...

    14-3-3 proteins are positive regulators of the tumor suppressor p53, the mutation of which is implicated in many human cancers. Current strategies for targeting of p53 involve restoration of wild-type function or inhibition of the interaction with MDM2, its key negative regulator. Despite the efficacy of these strategies, the alternate approach of stabilizing the interaction of p53 with positive regulators and, thus, enhancing tumor suppressor activity, has not been explored. Here, we report the first example of small-molecule stabilization of the 14-3-3 - p53 protein-protein interaction (PPI) and demonstrate the potential of this approach as a therapeutic modality. We also observed a disconnect between biophysical and crystallographic data in the presence of a stabilizing molecule, which is unusual in 14-3-3 PPIs.


    Organizational Affiliation

    Department of Chemistry, University of Duisburg-Essen, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
14-3-3 protein sigmaA236Homo sapiensMutation(s): 0 
Gene Names: SFNHME1
UniProt & NIH Common Fund Data Resources
Find proteins for P31947 (Homo sapiens)
Explore P31947 
Go to UniProtKB:  P31947
PHAROS:  P31947
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
p53 C-terminal 12 amino acidsB [auth P]3synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FSC (Subject of Investigation/LOI)
Query on FSC

Download Ideal Coordinates CCD File 
C [auth A]FUSICOCCIN
C36 H56 O12
KXTYBXCEQOANSX-WYKQKOHHSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
D [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
E [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
B [auth P]L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.688α = 90
b = 111.56β = 90
c = 62.69γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Marie CurieNetherlandsPIAP-GA-2011-286418 14-3-3stab

Revision History  (Full details and data files)

  • Version 1.0: 2017-11-08
    Type: Initial release
  • Version 2.0: 2019-03-13
    Changes: Atomic model, Data collection, Derived calculations