The Drosophila Cadherin Fat regulates tissue size and planar cell polarity through different domains.

The Drosophila Cadherin Fat regulates tissue size and planar cell polarity through different domains.
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果蝇钙粘蛋白脂肪通过不同的结构域调节组织大小和平面细胞极性。

DOI:
10.1371/journal.pone.0062998
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Simon MA
Simon MA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhao X;Yang CH;Simon MA

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果蝇钙粘蛋白脂肪(Ft)是组织大小和平面细胞极性(PCP)的重要调节因子。然而,Ft调节这些过程的确切机制仍不清楚。为了推进我们对Ft作用的理解,我们试图确定关键的Ft效应子结构域。在这里,我们报告说,一个小区域的Ft细胞质结构域(H2区)是必要的和足够的,当膜本地化,以支持活力和防止组织过度生长。有趣的是,H2区是调控PCP信号转导的关键,而缺乏H2区的突变体Ft完全能够指导PCP。这一结果表明,Ft在PCP信号传导和组织大小控制中的作用是可分离的,并且每一个都可以独立进行。令人惊讶的是,在我们的结构-功能研究中确定的Ft的关键区域与先前报道的与Atrophin,Dco或Lowfat的相互作用区域不重叠。
The Drosophila Cadherin Fat (Ft) has been identified as a crucial regulator of tissue size and Planar Cell Polarity (PCP). However, the precise mechanism by which Ft regulates these processes remains unclear. In order to advance our understanding of the action of Ft, we have sought to identify the crucial Ft effector domains. Here we report that a small region of the Ft cytoplasmic domain (H2 region) is both necessary and sufficient, when membrane localized, to support viability and prevent tissue overgrowth. Interestingly, the H2 region is dispensable for regulating PCP signaling, whereas the mutant Ft lacking the H2 region is fully capable of directing PCP. This result suggests that Ft’s roles in PCP signaling and tissue size control are separable, and each can be carried out independently. Surprisingly, the crucial regions of Ft identified in our structure-function study do not overlap with the previously reported interaction regions with Atrophin, Dco, or Lowfat.
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