Structural and functional analysis of LIM domain-dependent recruitment of paxillin to αvβ3 integrin-positive focal adhesions.

Structural and functional analysis of LIM domain-dependent recruitment of paxillin to αvβ3 integrin-positive focal adhesions.
复制标题

DOI:
10.1038/s42003-021-01886-9
复制
发表时间:
2021-03-29
影响因子:
5.9
通讯作者:
Wehrle-Haller B
Wehrle-Haller B
中科院分区:
生物学2区
文献类型:
--
作者:
Ripamonti M;Liaudet N;Azizi L;Bouvard D;Hytönen VP;Wehrle-Haller B

文献摘要

参考文献

被引文献

相似文献

对于β3整合素阳性的焦点粘连(FA)的适配蛋白PXLIN的LIM结构域依赖的定位从机制上还不清楚。在这里,通过结合分子生物学、光激活和FA分离实验,我们展示了巴西林的每个LIM结构域的特定贡献,并揭示了在黏附-复合体中的多重巴西林相互作用。β3整合素在β3VE/YA处的突变导致FAs快速内滑,与肌动蛋白逆行流动和增强的巴西林解离动力学相关。Paxlin与β3VE/YA整合素的机械偶联阻止了FA滑移,从而揭示了Paxlin对β3整合素/Talin簇成熟所必需的结构功能。此外,双分子荧光互补揭示了PXLIN LIM阵列的空间取向,将阳性LIM4并列在质膜和β3整合素尾部,而体外结合分析指向LIM1和/或LIM2与Talin-Head结构域的相互作用。这些数据提供了对β3整合素-FAs分子组织的结构洞察。Ripamonti等人。提供对单个Paxlin LIM结构域在靶向和维持局灶性粘连(FA)结构完整性方面的贡献的机械性见解。它们表明,FA中的帕西林与质膜或整合素的机械偶联对于FA的稳定性和整合素-Talin的连接是重要的。
The LIM domain-dependent localization of the adapter protein paxillin to β3 integrin-positive focal adhesions (FAs) is not mechanistically understood. Here, by combining molecular biology, photoactivation and FA-isolation experiments, we demonstrate specific contributions of each LIM domain of paxillin and reveal multiple paxillin interactions in adhesion-complexes. Mutation of β3 integrin at a putative paxillin binding site (β3VE/YA) leads to rapidly inward-sliding FAs, correlating with actin retrograde flow and enhanced paxillin dissociation kinetics. Induced mechanical coupling of paxillin to β3VE/YA integrin arrests the FA-sliding, thereby disclosing an essential structural function of paxillin for the maturation of β3 integrin/talin clusters. Moreover, bimolecular fluorescence complementation unveils the spatial orientation of the paxillin LIM-array, juxtaposing the positive LIM4 to the plasma membrane and the β3 integrin-tail, while in vitro binding assays point to LIM1 and/or LIM2 interaction with talin-head domain. These data provide structural insights into the molecular organization of β3 integrin-FAs. Ripamonti et al. provide mechanistic insight into the contribution of individual Paxillin LIM domains in targeting and maintaining the structural integrity of focal adhesions (FAs). They show that mechanical coupling of paxillin in the FA to the plasma membrane or integrin is important for FA stability and integrin-talin linkage.
DOI: 10.1083/jcb.201701176
发表时间: 2017-11-06
期刊: The Journal of cell biology
影响因子: --
作者:
Böttcher RT;Veelders M;Rombaut P;Faix J;Theodosiou M;Stradal TE;Rottner K;Zent R;Herzog F;Fässler R
通讯作者: Fässler R
DOI: 10.1091/mbc.e10-09-0790
发表时间: 2011-02-01
影响因子: 3.3
作者:
Deakin NO;Turner CE
通讯作者: Turner CE
DOI: 10.1042/bcj20190752
发表时间: 2020-01-01
影响因子: 4.1
作者:
Gadalla, Mohamed Rasheed;Abrami, Laurence;Veit, Michael
通讯作者: Veit, Michael
DOI: 10.1016/j.bpj.2010.12.3719
发表时间: 2011-02-02
影响因子: 3.4
作者:
Choi, Colin K.;Zareno, Jessica;Horwitz, Alan Rick
通讯作者: Horwitz, Alan Rick
DOI: 10.1242/dev.000877
发表时间: 2007-07-15
期刊: DEVELOPMENT
影响因子: 4.6
作者:
Bouvard, Daniel;Aszodi, Attila;Faessler, Reinhard
通讯作者: Faessler, Reinhard