Structural Basis for Chaperone‐Independent Ubiquitination of Tau Protein by Its E3 Ligase CHIP

Abstract: The multi‐site ubiquitination of Tau protein found in Alzheimer's disease filaments hints at the failed attempt of neurons to remove early toxic species. The ubiquitin‐dependent degradation of Tau is regulated in vivo by the E3 ligase CHIP, a quality controller of the cell proteome dedicated to target misfolded proteins for degradation. In our study, by using site‐resolved NMR, biochemical and computational methods, we elucidate the structural determinants underlying the molecular recognition between the ligase and its intrinsically disordered substrate. We reveal a multi‐domain dynamic interaction that explains how CHIP can direct ubiquitination of Tau at multiple sites even in the absence of chaperones, including its typical partner Hsp70/Hsc70. Our findings thus provide mechanistic insight into the chaperone‐independent engagement of a disordered protein by its E3 ligase.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Structural Basis for Chaperone‐Independent Ubiquitination of Tau Protein by Its E3 Ligase CHIP ; day:18 ; month:02 ; year:2022 ; extent:1
Angewandte Chemie ; (18.02.2022) (gesamt 1)

Urheber
Munari, Francesca
Mollica, Luca
Valente, Carlo
Parolini, Francesca
Kachoie, Elham Ataie
Arrigoni, Giorgio
D'Onofrio, Mariapina
Capaldi, Stefano
Assfalg, Michael

DOI
10.1002/ange.202112374
URN
urn:nbn:de:101:1-2022021814255249667816
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:30 MESZ

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Beteiligte

  • Munari, Francesca
  • Mollica, Luca
  • Valente, Carlo
  • Parolini, Francesca
  • Kachoie, Elham Ataie
  • Arrigoni, Giorgio
  • D'Onofrio, Mariapina
  • Capaldi, Stefano
  • Assfalg, Michael

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