Recreation of the terminal events in physiological integrin activation.
Recreation of the terminal events in physiological integrin activation.
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DOI:
10.1083/jcb.200908045
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发表时间:
2010-01-11
期刊:
影响因子:
--
通讯作者:
Ginsberg MH
中科院分区:
文献类型:
--
作者:
Ye F;Hu G;Taylor D;Ratnikov B;Bobkov AA;McLean MA;Sligar SG;Taylor KA;Ginsberg MH
In vitro analysis confirms talin binding is sufficient for activation and extension of membrane-embedded integrin. Increased affinity of integrins for the extracellular matrix (activation) regulates cell adhesion and migration, extracellular matrix assembly, and mechanotransduction. Major uncertainties concern the sufficiency of talin for activation, whether conformational change without clustering leads to activation, and whether mechanical force is required for molecular extension. Here, we reconstructed physiological integrin activation in vitro and used cellular, biochemical, biophysical, and ultrastructural analyses to show that talin binding is sufficient to activate integrin αIIbβ3. Furthermore, we synthesized nanodiscs, each bearing a single lipid-embedded integrin, and used them to show that talin activates unclustered integrins leading to molecular extension in the absence of force or other membrane proteins. Thus, we provide the first proof that talin binding is sufficient to activate and extend membrane-embedded integrin αIIbβ3, thereby resolving numerous controversies and enabling molecular analysis of reconstructed integrin signaling.
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影响因子:
7.8
作者:
Adair, Brian D;Xiong, Jian-Ping;Maddock, Catherine;Goodman, Simon L;Arnaout, M Amin;Yeager, Mark
通讯作者:
Yeager, Mark
影响因子:
64.8
作者:
Di Paolo, G;Pellegrini, L;De Camilli, P
通讯作者:
De Camilli, P
DOI:
10.1006/bbrc.2000.2653
发表时间:
2000-05-10
影响因子:
3.1
作者:
Goldmann, WH
通讯作者:
Goldmann, WH
影响因子:
4.8
作者:
Calderwood, DA;Tai, V;Ginsberg, MH
通讯作者:
Ginsberg, MH
影响因子:
64.5
作者:
Krueger, Marcus;Moser, Markus;Mann, Matthias
通讯作者:
Mann, Matthias