Tensin3 interaction with talin drives the formation of fibronectin-associated fibrillar adhesions.
Tensin3 interaction with talin drives the formation of fibronectin-associated fibrillar adhesions.
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Tensin3与塔林的相互作用驱动了与纤连蛋白相关的原纤维粘附的形成。
DOI:
10.1083/jcb.202107022
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发表时间:
2022-10-03
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影响因子:
--
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Atherton and Konstantinou et al. reveal the molecular mechanisms underpinning an interaction between the integrin-associated proteins tensin3 and talin. By associating with the intracellular force-generating actomyosin machinery, this talin–tensin3 interaction drives the formation of fibrillar adhesions and associated fibronectin fibrils as part of the extracellular matrix remodeling. The formation of healthy tissue involves continuous remodeling of the extracellular matrix (ECM). Whilst it is known that this requires integrin-associated cell-ECM adhesion sites (CMAs) and actomyosin-mediated forces, the underlying mechanisms remain unclear. Here, we examine how tensin3 contributes to the formation of fibrillar adhesions (FBs) and fibronectin fibrillogenesis. Using BioID mass spectrometry and a mitochondrial targeting assay, we establish that tensin3 associates with the mechanosensors such as talin and vinculin. We show that the talin R11 rod domain binds directly to a helical motif within the central intrinsically disordered region (IDR) of tensin3, whilst vinculin binds indirectly to tensin3 via talin. Using CRISPR knock-out cells in combination with defined tensin3 mutations, we show (i) that tensin3 is critical for the formation of α5β1-integrin FBs and for fibronectin fibrillogenesis, and (ii) the talin/tensin3 interaction drives this process, with vinculin acting to potentiate it.
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