학술논문
Loss of the batten disease protein CLN3 leads to mis-trafficking of M6PR and defective autophagic-lysosomal reformation
Document Type
Original Paper
Author
Calcagni’, Alessia; Staiano, Leopoldo; Zampelli, Nicolina; Minopoli, Nadia; Herz, Niculin J.; Di Tullio, Giuseppe; Huynh, Tuong; Monfregola, Jlenia; Esposito, Alessandra; Cirillo, Carmine; Bajic, Aleksandar; Zahabiyon, Mahla; Curnock, Rachel; Polishchuk, Elena; Parkitny, Luke; Medina, Diego Luis; Pastore, Nunzia; Cullen, Peter J.; Parenti, Giancarlo; De Matteis, Maria Antonietta; Grumati, Paolo; Ballabio, Andrea
Source
Nature Communications. 14(1)
Subject
Language
English
ISSN
2041-1723
Abstract
Batten disease, one of the most devastating types of neurodegenerative lysosomal storage disorders, is caused by mutations in CLN3. Here, we show that CLN3 is a vesicular trafficking hub connecting the Golgi and lysosome compartments. Proteomic analysis reveals that CLN3 interacts with several endo-lysosomal trafficking proteins, including the cation-independent mannose 6 phosphate receptor (CI-M6PR), which coordinates the targeting of lysosomal enzymes to lysosomes. CLN3 depletion results in mis-trafficking of CI-M6PR, mis-sorting of lysosomal enzymes, and defective autophagic lysosomal reformation. Conversely, CLN3 overexpression promotes the formation of multiple lysosomal tubules, which are autophagy and CI-M6PR-dependent, generating newly formed proto-lysosomes. Together, our findings reveal that CLN3 functions as a link between the M6P-dependent trafficking of lysosomal enzymes and lysosomal reformation pathway, explaining the global impairment of lysosomal function in Batten disease.
CLN3 mutations cause Batten disease, a devastating neurodegenerative lysosomal storage disease. Here, the authors discovered that CLN3 plays a crucial role in both trafficking of lysosomal proteins and autophagic lysosomal reformation.
CLN3 mutations cause Batten disease, a devastating neurodegenerative lysosomal storage disease. Here, the authors discovered that CLN3 plays a crucial role in both trafficking of lysosomal proteins and autophagic lysosomal reformation.