Final published version
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - An unmet actin requirement explains the mitotic inhibition of clathrin-mediated endocytosis
AU - Kaur, Satdip
AU - Fielding, Andrew B.
AU - Gassner, Gisela
AU - Carter, Nicholas J.
AU - Royle, Stephen J.
PY - 2014/2/18
Y1 - 2014/2/18
N2 - Clathrin-mediated endocytosis (CME) is the major internalisation route for many different receptor types in mammalian cells. CME is shut down during early mitosis, but the mechanism of this inhibition is unclear. In this study, we show that the mitotic shutdown is due to an unmet requirement for actin in CME. In mitotic cells, membrane tension is increased and this invokes a requirement for the actin cytoskeleton to assist the CME machinery to overcome the increased load. However, the actin cytoskeleton is engaged in the formation of a rigid cortex in mitotic cells and is therefore unavailable for deployment. We demonstrate that CME can be 'restarted' in mitotic cells despite high membrane tension, by allowing actin to engage in endocytosis. Mitotic phosphorylation of endocytic proteins is maintained in mitotic cells with restored CME, indicating that direct phosphorylation of the CME machinery does not account for shutdown. DOI: http://dx.doi.org/10.7554/eLife.00829.001.
AB - Clathrin-mediated endocytosis (CME) is the major internalisation route for many different receptor types in mammalian cells. CME is shut down during early mitosis, but the mechanism of this inhibition is unclear. In this study, we show that the mitotic shutdown is due to an unmet requirement for actin in CME. In mitotic cells, membrane tension is increased and this invokes a requirement for the actin cytoskeleton to assist the CME machinery to overcome the increased load. However, the actin cytoskeleton is engaged in the formation of a rigid cortex in mitotic cells and is therefore unavailable for deployment. We demonstrate that CME can be 'restarted' in mitotic cells despite high membrane tension, by allowing actin to engage in endocytosis. Mitotic phosphorylation of endocytic proteins is maintained in mitotic cells with restored CME, indicating that direct phosphorylation of the CME machinery does not account for shutdown. DOI: http://dx.doi.org/10.7554/eLife.00829.001.
KW - Actin Cytoskeleton
KW - Cell Cycle
KW - Cell Membrane
KW - Clathrin
KW - Endocytosis
KW - HeLa Cells
KW - Humans
KW - Mitosis
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.7554/eLife.00829
DO - 10.7554/eLife.00829
M3 - Journal article
C2 - 24550251
VL - 3
JO - eLife
JF - eLife
SN - 2050-084X
M1 - e00829
ER -