Drosophila PATJ supports adherens junction stability by modulating Myosin light chain activity.

Drosophila PATJ supports adherens junction stability by modulating Myosin light chain activity.
复制标题

DOI:
10.1083/jcb.201206064
复制
发表时间:
2012-11-12
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Krahn MP
Krahn MP
中科院分区:
其他
文献类型:
--
作者:
Sen A;Nagy-Zsvér-Vadas Z;Krahn MP

文献摘要

参考文献

被引文献

相似文献

PATJ通过增强肌球蛋白磷酸化,从而稳定粘附连接,间接促进上皮细胞的顶-基底极性。粘附连接(AJs)的组装和巩固是建立完整上皮的关键事件。然而,AJs被进一步修饰以获得细胞迁移和形态发生运动的灵活性。完整的AJs反过来又是上皮细胞中建立和维持顶部-基底极性的先决条件。在这项研究中,我们报告说,保守的PDZ(PSD 95,光盘大,ZO-1)结构域的蛋白PATJ(Pals 1相关的紧密连接蛋白)本身并不重要的维持顶底极性在果蝇上皮细胞,而是调节肌球蛋白的定位和磷酸化。PATJ直接与肌球蛋白磷酸酶的肌球蛋白结合亚基结合,降低肌球蛋白去磷酸化,导致激活的肌球蛋白。因此,PATJ支持粘附小带的稳定性。值得注意的是,在PATJ突变上皮中AJ的减弱首先导致AJ中肌球蛋白的损失,随后导致AJ的解体,最后导致组织的顶部-基底极性的损失和破坏。
PATJ indirectly promotes apical–basal polarity in epithelial cells by enhancing Myosin phosphorylation and thereby stabilizing adherens junctions. The assembly and consolidation of the adherens junctions (AJs) are key events in the establishment of an intact epithelium. However, AJs are further modified to obtain flexibility for cell migration and morphogenetic movements. Intact AJs in turn are a prerequisite for the establishment and maintenance of apical–basal polarity in epithelial cells. In this study, we report that the conserved PDZ (PSD95, Discs large, ZO-1) domain–containing protein PATJ (Pals1-associated tight junction protein) was not per se crucial for the maintenance of apical–basal polarity in Drosophila melanogaster epithelial cells but rather regulated Myosin localization and phosphorylation. PATJ directly bound to the Myosin-binding subunit of Myosin phosphatase and decreased Myosin dephosphorylation, resulting in activated Myosin. Thereby, PATJ supports the stability of the Zonula Adherens. Notably, weakening of AJ in a PATJ mutant epithelium led first to a loss of Myosin from the AJ, subsequently to a disassembly of the AJ, and finally, to a loss of apical–basal polarity and disruption of the tissue.
Rho-kinase in Vivo的肌球蛋白磷酸酶的肌球蛋白结合亚基(MB)的磷酸化。
DOI: 10.1083/jcb.147.5.1023
发表时间: 1999-11-29
期刊: The Journal of cell biology
影响因子: --
作者:
Kawano Y;Fukata Y;Oshiro N;Amano M;Nakamura T;Ito M;Matsumura F;Inagaki M;Kaibuchi K
通讯作者: Kaibuchi K
非肌肉肌球蛋白重链IIA在调节上皮顶连接处的独特作用。
DOI: 10.1371/journal.pone.0000658
发表时间: 2007-08-01
期刊: PLOS ONE
影响因子: 3.7
作者:
Ivanov, Andrei I.;Bachar, Moshe;Babbin, Brian A.;Adelstein, Robert S.;Nusrat, Asma;Parkos, Charles A.
通讯作者: Parkos, Charles A.
DOI: 10.1083/jcb.201006029
发表时间: 2010-09-06
期刊: The Journal of cell biology
影响因子: --
作者:
Krahn MP;Bückers J;Kastrup L;Wodarz A
通讯作者: Wodarz A
DOI: 10.1016/j.devcel.2009.04.011
发表时间: 2009-06-16
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
作者:
Krahn, Michael P.;Egger-Adam, Diane;Wodarz, Andreas
通讯作者: Wodarz, Andreas
DOI: 10.1083/jcb.200807020
发表时间: 2008-12-15
期刊: The Journal of cell biology
影响因子: --
作者:
Harris KP;Tepass U
通讯作者: Tepass U