RRC ID 49274
Author Oku M, Maeda Y, Kagohashi Y, Kondo T, Yamada M, Fujimoto T, Sakai Y.
Title Evidence for ESCRT- and clathrin-dependent microautophagy.
Journal J Cell Biol
Abstract Microautophagy refers to a mode of autophagy in which the lysosomal or vacuolar membrane invaginates and directly engulfs target components. The molecular machinery of membrane dynamics driving microautophagy is still elusive. Using immunochemical monitoring of yeast vacuolar transmembrane proteins, Vph1 and Pho8, fused to fluorescent proteins, we obtained evidence showing an induction of microautophagy after a diauxic shift in the yeast Saccharomyces cerevisiae Components of the endosomal sorting complex required for transport machinery were found to be required for this process, and the gateway protein of the machinery, Vps27, was observed to change its localization onto the vacuolar membrane after a diauxic shift. We revealed the functional importance of Vps27's interaction with clathrin in this microautophagy that also contributed to uptake of lipid droplets into the vacuole. This study sheds light on the molecular mechanism of microautophagy, which does not require the core Atg proteins.
Volume 216(10)
Pages 3263-3274
Published 2017-10-2
DOI 10.1083/jcb.201611029
PII jcb.201611029
PMID 28838958
PMC PMC5626533
MeSH Alkaline Phosphatase / genetics Alkaline Phosphatase / metabolism Autophagy / physiology* Clathrin / genetics Clathrin / metabolism* Endosomal Sorting Complexes Required for Transport / genetics Endosomal Sorting Complexes Required for Transport / metabolism* Saccharomyces cerevisiae / genetics Saccharomyces cerevisiae / metabolism* Saccharomyces cerevisiae Proteins / genetics Saccharomyces cerevisiae Proteins / metabolism
IF 8.811
Times Cited 43
Yeast BYP1419