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Exp Cell Res. 2001 Nov 15;271(1):1-9.

Yeast as a model system for studying endocytosis.

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  • 1Department of Biology, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA.


Endocytosis is the membrane trafficking process by which plasma membrane components and extracellular material are internalized into cytoplasmic vesicles and delivered to early and late endosomes, eventually either recycling back to the plasma membrane or arriving at the lysosome/vacuole. The budding yeast Saccharomyces cerevisiae has proven to be an invaluable system for identifying proteins involved in endocytosis and elucidating the mechanisms underlying internalization and postinternalization events. Through genetic studies in yeast and biochemical studies in mammalian cells, it has become apparent that multiple cellular processes are linked to endocytosis, including actin cytoskeletal dynamics, ubiquitylation, lipid modification, and signal transduction. In this review, we will highlight the most exciting recent findings in the field of yeast endocytosis. Specifically, we will address the involvement of the actin cytoskeleton in internalization, the role of ubiquitylation as a regulator of multiple steps of endocytosis in yeast, and the sorting of endocytosed proteins into the recycling and vacuolar pathways.

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