Zasp is required for the assembly of functional integrin adhesion sites.

Zasp is required for the assembly of functional integrin adhesion sites.
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ZASP是功能整合素粘附位点组装所必需的。

DOI:
10.1083/jcb.200707045
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发表时间:
2007-12-31
影响因子:
7.8
通讯作者:
Schoeck, Frieder
Schoeck, Frieder
中科院分区:
生物学1区
文献类型:
--
作者:
Jani, Klodiana;Schoeck, Frieder

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异二聚体跨膜受体的整合素家族介导细胞-基质粘附。整合素通常定位于高度组织化的结构中,如组织培养中的局灶性粘连和肌肉中的肌腱连接。我们的RNA干扰筛选基因,防止整联蛋白依赖性细胞传播识别Z带选择性剪接PDZ基序蛋白(zasp),编码唯一已知的果蝇Alp/谜PDZ-LIM结构域蛋白。Zasp定位于整联蛋白粘附位点,其缺失破坏整联蛋白粘附位点。在组织中,Zasp与βPS整联蛋白共定位于肌腱连接处,与α-辅肌动蛋白共定位于肌肉Z线。Zasp还与α-辅肌动蛋白发生物理相互作用。缺乏Zasp的蝇幼虫不能形成Z线,也不能将α-辅肌动蛋白募集到Z线。在肌腱连接处,zasp突变体的肌肉随着收缩力的开始而分离。最后,Zasp与整合素在遗传上相互作用,表明它调节整合素功能。我们的观察点的一个重要功能Zasp在组装的整合素粘附位点在细胞培养和组织中。
The integrin family of heterodimeric transmembrane receptors mediates cell–matrix adhesion. Integrins often localize in highly organized structures, such as focal adhesions in tissue culture and myotendinous junctions in muscles. Our RNA interference screen for genes that prevent integrin-dependent cell spreading identifies Z band alternatively spliced PDZ-motif protein (zasp), encoding the only known Drosophila melanogaster Alp/Enigma PDZ-LIM domain protein. Zasp localizes to integrin adhesion sites and its depletion disrupts integrin adhesion sites. In tissues, Zasp colocalizes with βPS integrin in myotendinous junctions and with α-actinin in muscle Z lines. Zasp also physically interacts with α-actinin. Fly larvae lacking Zasp do not form Z lines and fail to recruit α-actinin to the Z line. At the myotendinous junction, muscles detach in zasp mutants with the onset of contractility. Finally, Zasp interacts genetically with integrins, showing that it regulates integrin function. Our observations point to an important function for Zasp in the assembly of integrin adhesion sites both in cell culture and in tissues.
DOI: 10.1083/jcb.101.4.1532
发表时间: 1985-10
期刊: The Journal of cell biology
影响因子: --
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