Transport of proteins to the yeast vacuole: autophagy, cytoplasm-to-vacuole targeting, and role of the vacuole in degradation

Semin Cell Dev Biol. 2000 Jun;11(3):173-9. doi: 10.1006/scdb.2000.0163.

Abstract

The vacuole/lysosome performs a central role in degradation. Proteins and organelles are transported to the vacuole by selective and non-selective pathways. Transport to the vacuole by autophagy is the primary mode for degradation of cytoplasmic constituents under starvation conditions. Autophagy overlaps mechanistically and genetically with a biosynthetic pathway termed Cvt (Cytoplasm-to-vacuole targeting) that operates under vegetative conditions to transport the resident vacuolar hydrolase aminopeptidase I (API). API import has been dissected to reveal the action of a novel mechanism that transports cargo within double-membrane vesicles. Recent work has uncovered molecular components involved in autophagy and the Cvt pathway.

Publication types

  • Review

MeSH terms

  • Aminopeptidases / metabolism
  • Autophagy
  • Cell Membrane / metabolism
  • Cytoplasm / metabolism
  • Fungal Proteins / metabolism*
  • Intracellular Membranes / metabolism
  • Protein Transport*
  • Saccharomyces cerevisiae Proteins*
  • Vacuoles / enzymology*
  • Vacuoles / metabolism
  • Yeasts / metabolism*

Substances

  • Fungal Proteins
  • Saccharomyces cerevisiae Proteins
  • Aminopeptidases
  • APE1 protein, S cerevisiae