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Phosphorylated full-length Tau interacts with 14-3-3 proteins via two short phosphorylated sequences, each occupying a binding groove of 14-3-3 dimer
JF. Neves, O. Petrvalská, F. Bosica, FX. Cantrelle, H. Merzougui, G. O'Mahony, X. Hanoulle, T. Obšil, I. Landrieu
Language English Country Great Britain
Document type Journal Article, Research Support, Non-U.S. Gov't
NLK
Free Medical Journals
from 2005 to 1 year ago
Medline Complete (EBSCOhost)
from 2005-01-01 to 1 year ago
Wiley Free Content
from 2005 to 1 year ago
PubMed
32979285
DOI
10.1111/febs.15574
Knihovny.cz E-resources
- MeSH
- Alzheimer Disease genetics metabolism pathology MeSH
- Exoribonucleases chemistry genetics metabolism MeSH
- Phosphorylation MeSH
- Protein Conformation MeSH
- Humans MeSH
- Magnetic Resonance Spectroscopy MeSH
- Protein Multimerization * MeSH
- Mutation MeSH
- Surface Plasmon Resonance MeSH
- Cyclic AMP-Dependent Protein Kinases metabolism MeSH
- 14-3-3 Proteins chemistry genetics metabolism MeSH
- tau Proteins chemistry genetics metabolism MeSH
- Serine chemistry metabolism MeSH
- Protein Binding MeSH
- Binding Sites MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Protein-protein interactions (PPIs) remain poorly explored targets for the treatment of Alzheimer's disease. The interaction of 14-3-3 proteins with Tau was shown to be linked to Tau pathology. This PPI is therefore seen as a potential target for Alzheimer's disease. When Tau is phosphorylated by PKA (Tau-PKA), several phosphorylation sites are generated, including two known 14-3-3 binding sites, surrounding the phosphorylated serines 214 and 324 of Tau. The crystal structures of 14-3-3 in complex with peptides surrounding these Tau phosphosites show that both these motifs are anchored in the amphipathic binding groove of 14-3-3. However, in the absence of structural data with the full-length Tau protein, the stoichiometry of the complex or the interface and affinity of the partners is still unclear. In this work, we addressed these points, using a broad range of biophysical techniques. The interaction of the long and disordered Tau-PKA protein with 14-3-3σ is restricted to two short sequences, containing phosphorylated serines, which bind in the amphipathic binding groove of 14-3-3σ. Phosphorylation of Tau is fundamental for the formation of this stable complex, and the affinity of the Tau-PKA/14-3-3σ interaction is in the 1-10 micromolar range. Each monomer of the 14-3-3σ dimer binds one of two different phosphorylated peptides of Tau-PKA, suggesting a 14-3-3/Tau-PKA stoichiometry of 2 : 1, confirmed by analytical ultracentrifugation. These results contribute to a better understanding of this PPI and provide useful insights for drug discovery projects aiming at the modulation of this interaction.
References provided by Crossref.org
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- $a Protein-protein interactions (PPIs) remain poorly explored targets for the treatment of Alzheimer's disease. The interaction of 14-3-3 proteins with Tau was shown to be linked to Tau pathology. This PPI is therefore seen as a potential target for Alzheimer's disease. When Tau is phosphorylated by PKA (Tau-PKA), several phosphorylation sites are generated, including two known 14-3-3 binding sites, surrounding the phosphorylated serines 214 and 324 of Tau. The crystal structures of 14-3-3 in complex with peptides surrounding these Tau phosphosites show that both these motifs are anchored in the amphipathic binding groove of 14-3-3. However, in the absence of structural data with the full-length Tau protein, the stoichiometry of the complex or the interface and affinity of the partners is still unclear. In this work, we addressed these points, using a broad range of biophysical techniques. The interaction of the long and disordered Tau-PKA protein with 14-3-3σ is restricted to two short sequences, containing phosphorylated serines, which bind in the amphipathic binding groove of 14-3-3σ. Phosphorylation of Tau is fundamental for the formation of this stable complex, and the affinity of the Tau-PKA/14-3-3σ interaction is in the 1-10 micromolar range. Each monomer of the 14-3-3σ dimer binds one of two different phosphorylated peptides of Tau-PKA, suggesting a 14-3-3/Tau-PKA stoichiometry of 2 : 1, confirmed by analytical ultracentrifugation. These results contribute to a better understanding of this PPI and provide useful insights for drug discovery projects aiming at the modulation of this interaction.
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