Passing membranes to autophagy: Unconventional membrane tethering by Atg17.

ABSTRACT: Macroautophagy delivers cytoplasmic material to lysosomal/vacuolar compartments for degradation. Conserved multisubunit complexes, composed of autophagy-related (Atg) proteins, initiate the formation of membrane precursors, termed phagophores. Under physiological conditions these cup-shaped structures can capture cytoplasmic material highly selectively. Starvation or cytotoxic stresses, however, initiate the formation of much larger phagophores to enclose cytoplasm nonselectively. The biogenesis of nonselective autophagosomes is initiated by the hierarchical assembly of the Atg1 kinase complex and the recruitment of Atg9 vesicles at the phagophore assembly site (PAS). In this punctum we summarize our recent findings regarding tethering of Atg9 vesicles by the Atg1 kinase complex. We discus

SUBMITTER: Matscheko N 

PROVIDER: S-EPMC5361593 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature