The C terminus of talin links integrins to cell cycle progression.

The C terminus of talin links integrins to cell cycle progression.
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DOI:
10.1083/jcb.201104128
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发表时间:
2011-10-31
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Streuli CH
Streuli CH
中科院分区:
其他
文献类型:
--
作者:
Wang P;Ballestrem C;Streuli CH

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Talin recruits and activates focal adhesion proteins required for cell cycle progression. Integrins are cell adhesion receptors that sense the extracellular matrix (ECM) environment. One of their functions is to regulate cell fate decisions, although the question of how integrins initiate intracellular signaling is not fully resolved. In this paper, we examine the role of talin, an adapter protein at cell–matrix attachment sites, in outside-in signaling. We used lentiviral small hairpin ribonucleic acid to deplete talin in mammary epithelial cells. These cells still attached to the ECM in an integrin-dependent manner and spread. They had a normal actin cytoskeleton, but vinculin, paxillin, focal adhesion kinase (FAK), and integrin-linked kinase were not recruited to adhesion sites. Talin-deficient cells showed proliferation defects, and reexpressing a tail portion of the talin rod, but not its head domain, restored integrin-mediated FAK phosphorylation, suppressed p21 expression, and rescued cell cycle. Thus, talin recruits and activates focal adhesion proteins required for proliferation via the C terminus of its rod domain. Our study reveals a new function for talin, which is to link integrin adhesions with cell cycle progression.
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