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Plasma membrane microdomains regulate turnover of transport proteins in yeast

In this study, we investigate whether the stable segregation of proteins and lipids within the yeast plasma membrane serves a particular biological function. We show that 21 proteins cluster within or associate with the ergosterol-rich membrane compartment of Can1 (MCC). However, proteins of the end...

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Bibliographische Detailangaben
1. Verfasser: Großmann, Guido (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: December 8, 2008
In: The journal of cell biology
Year: 2008, Jahrgang: 183, Heft: 6, Pages: 1075-1088
ISSN:1540-8140
DOI:10.1083/jcb.200806035
Online-Zugang:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1083/jcb.200806035
Verlag, kostenfrei, Volltext: http://jcb.rupress.org/content/183/6/1075
Volltext
Verfasserangaben:Guido Grossmann, Jan Malinsky, Wiebke Stahlschmidt, Martin Loibl, Ina Weig-Meckl, Wolf B. Frommer, Miroslava Opekarová, and Widmar Tanner
Beschreibung
Zusammenfassung:In this study, we investigate whether the stable segregation of proteins and lipids within the yeast plasma membrane serves a particular biological function. We show that 21 proteins cluster within or associate with the ergosterol-rich membrane compartment of Can1 (MCC). However, proteins of the endocytic machinery are excluded from MCC. In a screen, we identified 28 genes affecting MCC appearance and found that genes involved in lipid biosynthesis and vesicle transport are significantly overrepresented. Deletion of Pil1, a component of eisosomes, or of Nce102, an integral membrane protein of MCC, results in the dissipation of all MCC markers. These deletion mutants also show accelerated endocytosis of MCC-resident permeases Can1 and Fur4. Our data suggest that release from MCC makes these proteins accessible to the endocytic machinery. Addition of arginine to wild-type cells leads to a similar redistribution and increased turnover of Can1. Thus, MCC represents a protective area within the plasma membrane to control turnover of transport proteins.
Beschreibung:Gesehen am 16.05.2017
Beschreibung:Online Resource
ISSN:1540-8140
DOI:10.1083/jcb.200806035

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