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  Autophagic Clearance of PolyQ Proteins Mediated by Ubiquitin-Atg8 Adaptors of the Conserved CUET Protein Family

Lu, K., Psakhye, I., & Jentsch, S. (2014). Autophagic Clearance of PolyQ Proteins Mediated by Ubiquitin-Atg8 Adaptors of the Conserved CUET Protein Family. CELL, 158(3), 549-563. doi:10.1016/j.cell.2014.05.048.

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 Urheber:
Lu, Kefeng1, Autor           
Psakhye, Ivan1, Autor           
Jentsch, Stefan1, Autor           
Affiliations:
1Jentsch, Stefan / Molecular Cell Biology, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565156              

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Schlagwörter: SELECTIVE AUTOPHAGY; MISFOLDED PROTEINS; PROTEASOME SYSTEM; DEGRADATION; BINDING; DOMAIN; TOLLIP; RECOGNITION; DISEASE; AGGREGATION
 Zusammenfassung: Selective ubiquitin-dependent autophagy plays a pivotal role in the elimination of protein aggregates, assemblies, or organelles and counteracts the cytotoxicity of proteins linked to neurodegenerative diseases. Following substrate ubiquitylation, the cargo is delivered to autophagosomes involving adaptors like human p62 that bind ubiquitin and the autophagosomal ubiquitin-like protein Atg8/LC3; however, whether similar pathways exist in lower eukaryotes remained unclear. Here, we identify by a screen in yeast a new class of ubiquitin-Atg8 adaptors termed CUET proteins, comprising the ubiquitin-binding CUE-domain protein Cue5 from yeast and its human homolog Tollip. Cue5 collaborates with Rsp5 ubiquitin ligase, and the corresponding yeast mutants accumulate aggregation-prone proteins and are vulnerable to polyQ protein expression. Similarly, Tollip depletion causes cytotoxicity toward polyQ proteins, whereas Tollip overexpression clears human cells from Huntington's disease-linked polyQ proteins by autophagy. We thus propose that CUET proteins play a critical and ancient role in autophagic clearance of cytotoxic protein aggregates.

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Sprache(n): eng - English
 Datum: 2014
 Publikationsstatus: Erschienen
 Seiten: 15
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000340944300009
DOI: 10.1016/j.cell.2014.05.048
 Art des Abschluß: -

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Titel: CELL
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA : CELL PRESS
Seiten: - Band / Heft: 158 (3) Artikelnummer: - Start- / Endseite: 549 - 563 Identifikator: ISSN: 0092-8674