The proteolytic landscape of the yeast vacuole.
The vacuole in the yeastSaccharomyces cerevisiaeplays a number of essential roles, and to provide some of these required functions the vacuole harbors at least seven distinct proteases. These proteases exhibit a range of activities and different classifications, and they follow unique paths to arrive at their ultimate, common destination in the cell. This review will first summarize the major functions of the yeast vacuole and delineate how proteins are targeted to this organelle. We will then describe the specific trafficking itineraries and activities of the characterized vacuolar proteases, and outline select features of a new member of this protease ensemble. Finally, we will entertain the question of why so many proteases evolved and reside in the vacuole, and what future research challenges exist in the field.
Department of Biological Sciences; University of Pittsburgh; Pittsburgh, PA USA.
Karen A
KA
Hecht
Department of Cell Biology; University of Pittsburgh School of Medicine; Pittsburgh, PA USA.
Allyson F
AF
O'Donnell
Department of Biological Sciences; University of Pittsburgh; Pittsburgh, PA USA.
Jeffrey L
JL
Brodsky
CPY; Pff1; S. cerevisiae; Vps10; autophagy; endocytosis; hydrolysis; metalloprotease; protease; secretory pathway