Titre :

A Small Tau Fragment Specifically Templates Four Repeat Tau Aggregates Through Multiple Generations

Auteur(s) :

Longhini, Andrew [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Dubose, Austin [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Lobo, Samuel [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Vijayan, Vishnu [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Bai, Yeran [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Rivera, Erica Keane [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Salar-Jarque, Julia [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Nikitina, Arina [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Carrettiero, Daniel [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Universidade Federal do ABC = Federal University of ABC = Université Fédérale de l'ABC [Brazil] [UFABC]
Unger, Matthew [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Sclafani, Olivia [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Fu, Valerie [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Vigers, Michael [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Buee, Luc [Auteur]
Lille Neurosciences & Cognition - U 1172 [LilNCog]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Excellence Laboratory LabEx DISTALZ
Landrieu, Isabelle [Auteur]
Biologie Structurale Intégrative [ERL 9002 - INSERM U1167 - BSI]
Shell, Scott [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Shea, Joan [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Facteurs de Risque et Déterminants Moléculaires des Maladies liées au Vieillissement - U 1167 [RID-AGE]
Han, Songi [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]
Kosik, Kenneth [Auteur]
University of California [Santa Barbara] [UC Santa Barbara]

Date de publication :

2023-08-31

Mot(s)-clé(s) en anglais :

Amyloidogenic Core
Biological Sciences
Neuroscience
Prion-Like Templating
Protein Misfolding
Tauopathies

Discipline(s) HAL :

Sciences du Vivant [q-bio]

Résumé en anglais : [en]

Prion-like spread of disease-specific tau conformers is a hallmark of all tauopathies. A 19-residue probe peptide containing a P301L mutation and spanning the R2/R3 splice junction of tau, folds and stacks into seeding-competent ...
Lire la suite >Prion-like spread of disease-specific tau conformers is a hallmark of all tauopathies. A 19-residue probe peptide containing a P301L mutation and spanning the R2/R3 splice junction of tau, folds and stacks into seeding-competent fibrils and induces aggregation of 4R, but not 3R tau. These tau peptide fibrils propagate aggregated intracellular tau over multiple generations, have a high β-sheet content, a colocalized lipid signal, and adopt a well-defined U-shaped fold found in 4R tauopathy brain-derived fibrils. Fully atomistic replica exchange molecular dynamics (MD) simulations were used to compute the free energy landscapes of the conformational ensemble of the peptide monomers. These identified an aggregation-prohibiting β-hairpin structure and an aggregation-competent U-fold unique to 4R tauopathy fibrils. Guided by MD simulations, we identified that the N-terminal-flanking residues to PHF6, which slightly vary between 4R and 3R isoforms, modulate seeding. Strikingly, when a single amino acid switch at position 305 replaced the serine of 4R tau with a lysine from the corresponding position in the first repeat of 3R tau, the seeding induced by the 19-residue peptide was markedly reduced. Conversely, a 4R tau mimic with three repeats, prepared by replacing those amino acids in the first repeat with those amino acids uniquely present in the second repeat, recovered aggregation when exposed to the 19-residue peptide. These peptide fibrils function as partial prions to recruit naïve 4R tau-ten times the length of the peptide-and serve as a critical template for 4R tauopathy propagation. These results hint at opportunities for tau isoform-specific therapeutic interventions.Lire moins >

Langue :

Anglais

Collections :

• Facteurs de risque et déterminants moléculaires des maladies liées au vieillissement (RID-AGE) - U1167

Source :

Harvested from HAL