Dynein and EFF-1 control dendrite morphology by regulating the localization pattern of SAX-7 in epidermal cells

Dynein and EFF-1 control dendrite morphology by regulating the localization pattern of SAX-7 in epidermal cells
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动力蛋白和 EFF-1 通过调节 SAX-7 在表皮细胞中的定位模式来控制树突形态。

DOI:
10.1242/jcs.201699
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发表时间:
2017-12
影响因子:
4
通讯作者:
Shen Kang
Shen Kang
中科院分区:
生物学2区
文献类型:
--
作者:
Zhu Ting;Liang Xing;Wang Xiang-Ming;Shen Kang

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摘要我们的前期工作表明,细胞粘附分子SAX-7在秀丽隐杆线虫表皮细胞中形成了一种精细的模式,指导PVD树突的分支。然而,在表皮中形成SAX-7模式的分子机制尚未完全了解。在这里,我们报告,动力蛋白轻中间链DLI-1和融合因子EFF-1需要在表皮细胞的模式SAX-7。虽然以前的报告表明,这两种分子的行为细胞自主的PVD,我们的研究结果表明,在这些突变体中的无序PVD树突状乔木是由于异常的SAX-7定位模式在表皮细胞。有三条证据支持这一观点。首先,表皮SAX-7模式在dli-1和eff-1突变体中受到严重影响。第二,异常的SAX-7模式是异位PVD树突的预测。第三,DLI-1或EFF-1在表皮中的表达拯救了SAX-7模式和紊乱的PVD树突表型,而这些分子在PVD中的表达没有。我们还发现DLI-1在PVD中自主发挥细胞功能,促进远端分支形成。这些结果证明了表皮中DLI-1和EFF-1在PVD树突形态发生的控制中的意想不到的作用。动力蛋白和EFF-1在C. elegans通过表皮SAX-7。
ABSTRACT Our previous work showed that the cell adhesion molecule SAX-7 forms an elaborate pattern in Caenorhabditis elegans epidermal cells, which instructs PVD dendrite branching. However, the molecular mechanism forming the SAX-7 pattern in the epidermis is not fully understood. Here, we report that the dynein light intermediate chain DLI-1 and the fusogen EFF-1 are required in epidermal cells to pattern SAX-7. While previous reports suggest that these two molecules act cell-autonomously in the PVD, our results show that the disorganized PVD dendritic arbors in these mutants are due to the abnormal SAX-7 localization patterns in epidermal cells. Three lines of evidence support this notion. First, the epidermal SAX-7 pattern was severely affected in dli-1 and eff-1 mutants. Second, the abnormal SAX-7 pattern was predictive of the ectopic PVD dendrites. Third, expression of DLI-1 or EFF-1 in the epidermis rescued both the SAX-7 pattern and the disorganized PVD dendrite phenotypes, whereas expression of these molecules in the PVD did not. We also show that DLI-1 functions cell-autonomously in the PVD to promote distal branch formation. These results demonstrate the unexpected roles of DLI-1 and EFF-1 in the epidermis in the control of PVD dendrite morphogenesis. Summary: Dynein and EFF-1 have a non-autonomous function in patterning PVD dendrites in C. elegans through epidermal SAX-7.
受体酪氨酸磷酸酶 CLR-1 在皮肤细胞中发挥作用,促进感觉树突生长。
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