Endocytosis and acto-myosin cytoskeleton in polarity and morphogenesis |
amaj J, Baluka F, Voigt B, Volkmann D, Menzel D |
In: Plant Endocytosis, amaj J, Baluka F, Menzel D (eds), Springer Verlag , 233-244 (2006) |
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Mutual interactions between actin and endocytic assembly machineries are essential for successful clathrin-mediated endocytosis in yeast and mammals. The actin cytoskeleton is indispensable for endocytic internalization and for short-range transport of endocytic vesicles. In plant as well, actin seems to be essential for endocytic recycling of plasma membrane proteins and sterols, but surprisingly also for the turnover of cell wall pectins, which have been identified as a major cargo of endocytic vesicles. Endosomes in animal cells perform long-range movements along microtubules, whereas plant endosomes use preferentially an actin polymerization mechanism but also actin tracks for their short- and long-range movements, respectively. Thus, the actin cytoskeleton not only assists endocytic internalization and is in fact inherently associated with endosomal vesicles and endosomes, but also is responsible for their movements at the cell cortex and for their targeted delivery into the cell interior. |
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