5D3E

Crystal structure of human 14-3-3 gamma in complex with CFTR R-domain peptide pS768-pS795


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Characterization and small-molecule stabilization of the multisite tandem binding between 14-3-3 and the R domain of CFTR.

Stevers, L.M.Lam, C.V.Leysen, S.F.Meijer, F.A.van Scheppingen, D.S.de Vries, R.M.Carlile, G.W.Milroy, L.G.Thomas, D.Y.Brunsveld, L.Ottmann, C.

(2016) Proc.Natl.Acad.Sci.USA 113: E1152-E1161

  • DOI: 10.1073/pnas.1516631113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cystic fibrosis is a fatal genetic disease, most frequently caused by the retention of the CFTR (cystic fibrosis transmembrane conductance regulator) mutant protein in the endoplasmic reticulum (ER). The binding of the 14-3-3 protein to the CFTR regu ...

    Cystic fibrosis is a fatal genetic disease, most frequently caused by the retention of the CFTR (cystic fibrosis transmembrane conductance regulator) mutant protein in the endoplasmic reticulum (ER). The binding of the 14-3-3 protein to the CFTR regulatory (R) domain has been found to enhance CFTR trafficking to the plasma membrane. To define the mechanism of action of this protein-protein interaction, we have examined the interaction in vitro. The disordered multiphosphorylated R domain contains nine different 14-3-3 binding motifs. Furthermore, the 14-3-3 protein forms a dimer containing two amphipathic grooves that can potentially bind these phosphorylated motifs. This results in a number of possible binding mechanisms between these two proteins. Using multiple biochemical assays and crystal structures, we show that the interaction between them is governed by two binding sites: The key binding site of CFTR (pS768) occupies one groove of the 14-3-3 dimer, and a weaker, secondary binding site occupies the other binding groove. We show that fusicoccin-A, a natural-product tool compound used in studies of 14-3-3 biology, can stabilize the interaction between 14-3-3 and CFTR by selectively interacting with a secondary binding motif of CFTR (pS753). The stabilization of this interaction stimulates the trafficking of mutant CFTR to the plasma membrane. This definition of the druggability of the 14-3-3-CFTR interface might offer an approach for cystic fibrosis therapeutics.


    Organizational Affiliation

    Laboratory of Chemical Biology, Department of Biomedical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands; Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein gamma
A, B, E, F, I, J
241Homo sapiensMutation(s): 0 
Gene Names: YWHAG
Find proteins for P61981 (Homo sapiens)
Go to Gene View: YWHAG
Go to UniProtKB:  P61981
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cystic fibrosis transmembrane conductance regulator
C, G, K
40Homo sapiensMutation(s): 0 
Gene Names: CFTR (ABCC7)
Find proteins for P13569 (Homo sapiens)
Go to Gene View: CFTR
Go to UniProtKB:  P13569
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
C, G, K
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.202 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 122.450α = 90.00
b = 122.450β = 90.00
c = 313.159γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-16
    Type: Initial release