Alice D Baudot, Victoria M-Y Wang, Josh D Leach, Jim O'Prey, Jaclyn S Long, Viola Paulus-Hock, Sergio Lilla, David M Thomson, John Greenhorn, Farah Ghaffar, Colin Nixon, Miep H Helfrich, Douglas Strathdee, Judith Pratt, Francesco Marchesi, Sara Zanivan, Kevin M Ryan
Macroautophagy promotes cellular homeostasis by delivering cytoplasmic constituents to lysosomes for degradation [Mizushima, Nat. Cell Biol. 20, 521-527 (2018)]. However, while most studies have focused on the mechanisms of protein degradation during this process, we report here that macroautophagy also depends on glycan degradation via the glycosidase, α-l-fucosidase 1 (FUCA1), which removes fucose from glycans. We show that cells lacking FUCA1 accumulate lysosomal glycans, which is associated with impaired autophagic flux...
June 28, 2022: Proceedings of the National Academy of Sciences of the United States of America