6FBY

Crystal structure of C-terminal modified Tau peptide-hybrid 4.2b with 14-3-3sigma


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.141 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Inhibition of 14-3-3/Tau by Hybrid Small-Molecule Peptides Operating via Two Different Binding Modes.

Andrei, S.A.Meijer, F.A.Neves, J.F.Brunsveld, L.Landrieu, I.Ottmann, C.Milroy, L.G.

(2018) ACS Chem Neurosci 9: 2639-2654

  • DOI: 10.1021/acschemneuro.8b00118
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Current molecular hypotheses have not yet delivered marketable treatments for Alzheimer's disease (AD), arguably due to a lack of understanding of AD biology and an overreliance on conventional drug modalities. Protein-protein interactions (PPIs) are ...

    Current molecular hypotheses have not yet delivered marketable treatments for Alzheimer's disease (AD), arguably due to a lack of understanding of AD biology and an overreliance on conventional drug modalities. Protein-protein interactions (PPIs) are emerging drug targets, which show promise for the treatment of, e.g., cancer, but are still underexploited for treating neurodegenerative diseases. 14-3-3 binding to phosphorylated Tau is a promising PPI drug target based on its reported destabilizing effect on microtubules, leading to enhanced neurofibrillary tangle formation as a potential cause of AD-related neurodegeneration. Inhibition of 14-3-3/Tau may therefore be neuroprotective. Previously, we reported the structure-guided development of modified peptide inhibitors of 14-3-3/Tau. Here, we report further efforts to optimize the binding mode and activity of our modified Tau peptides through a combination of chemical synthesis, biochemical assays, and X-ray crystallography. Most notably, we were able to characterize two different high-affinity binding modes, both of which inhibited 14-3-3-binding to full-length PKA-phosphorylated Tau protein in vitro as measured by NMR spectroscopy. Our findings, besides producing useful tool inhibitor compounds for studying 14-3-3/Tau, have enhanced our understanding of the molecular parameters for inhibiting 14-3-3/Tau, which are important milestones toward the establishment of our 14-3-3 PPI hypothesis.


    Organizational Affiliation

    Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems , Technische Universiteit Eindhoven , Den Dolech 2 , 5612 AZ Eindhoven , The Netherlands.,UMR 8576 CNRS-Lille University, 59000 Villeneuve d'Ascq , France.,Department of Chemistry , University of Duisburg-Essen , Universitätsstrasse 7 , 45117 Essen , Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein sigma
A, C
236Homo sapiensMutation(s): 0 
Gene Names: SFN (HME1)
Find proteins for P31947 (Homo sapiens)
Go to Gene View: SFN
Go to UniProtKB:  P31947
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ACE-ARG-THR-PRO-SEP-LEU-PRO-GLY
B
8Homo sapiensMutation(s): 0 
Gene Names: MAPT (MAPTL, MTBT1, TAU)
Find proteins for P10636 (Homo sapiens)
Go to Gene View: MAPT
Go to UniProtKB:  P10636
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
THR-PRO-SEP-LEU-PRO-GLY
D
6Homo sapiensMutation(s): 0 
Gene Names: MAPT (MAPTL, MTBT1, TAU)
Find proteins for P10636 (Homo sapiens)
Go to Gene View: MAPT
Go to UniProtKB:  P10636
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
D4H
Query on D4H

Download SDF File 
Download CCD File 
B, D
(2~{R})-2-[(~{S})-(3-methylphenyl)-phenyl-methyl]pyrrolidine
C18 H21 N
BNKCKJVWLJSDQN-MSOLQXFVSA-N
 Ligand Interaction
NA
Query on NA

Download SDF File 
Download CCD File 
A, C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B, D
L-PEPTIDE LINKINGC3 H8 N O6 PSER
ACE
Query on ACE
B
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.141 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 62.759α = 90.00
b = 70.230β = 90.00
c = 127.990γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
PHASERphasing
Aimlessdata scaling
MOSFLMdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Netherlands--

Revision History 

  • Version 1.0: 2018-05-16
    Type: Initial release
  • Version 1.1: 2018-11-28
    Type: Data collection, Database references
  • Version 2.0: 2019-02-27
    Type: Atomic model, Data collection, Derived calculations