Notch ligand endocytosis generates mechanical pulling force dependent on dynamin, epsins, and actin.
Notch ligand endocytosis generates mechanical pulling force dependent on dynamin, epsins, and actin.
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DOI:
10.1016/j.devcel.2012.04.005
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发表时间:
2012-06-12
影响因子:
11.8
通讯作者:
Weinmaster, Gerry
中科院分区:
文献类型:
--
作者:
Meloty-Kapella, Laurence;Shergill, Bhupinder;Kuon, Jane;Botvinick, Elliot;Weinmaster, Gerry
Notch signaling induced by cell surface ligands is critical to development and maintenance of many eukaryotic organisms. Notch and its ligands are integral membrane proteins that facilitate direct cell-cell interactions to activate Notch proteolysis and release the intracellular domain that directs Notch-specific cellular responses. Genetic studies suggest Notch ligands require endocytosis, ubiquitylation and epsin endocytic adaptors to activate signaling, yet the exact role ligand endocytosis serves remains unresolved. Here we characterize a molecularly distinct mode of clathrin-mediated endocytosis requiring ligand ubiquitylation, epsins and actin for ligand cells to activate signaling in Notch cells. Using a cell-bead optical tweezers system, we obtained evidence for cell-mediated mechanical force dependent on this distinct mode of ligand endocytosis. We propose mechanical pulling force produced by endocytosis of Notch-bound ligand drives conformational changes in Notch that permit activating proteolysis.
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作者:
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通讯作者:
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DOI:
10.1083/jcb.200702009
发表时间:
2007-07-30
期刊:
The Journal of cell biology
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10.1083/jcb.131.1.69
发表时间:
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The Journal of cell biology
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DOI:
10.1016/j.biocel.2006.12.004
发表时间:
2007-01-01
影响因子:
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DOI:
10.1073/pnas.0907008106
发表时间:
2009-08-18
影响因子:
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通讯作者:
Cremona, Ottavio