Ryk cooperates with Frizzled 7 to promote Wnt11-mediated endocytosis and is essential for Xenopus laevis convergent extension movements.

Ryk cooperates with Frizzled 7 to promote Wnt11-mediated endocytosis and is essential for Xenopus laevis convergent extension movements.
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DOI:
10.1083/jcb.200710188
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发表时间:
2008-09-22
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Han JK
Han JK
中科院分区:
其他
文献类型:
--
作者:
Kim GH;Her JH;Han JK

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单通道跨膜蛋白Ryk(非典型受体相关酪氨酸激酶)具有Wnt受体的功能。然而,Ryk与Wnt/FrizzledFZ(FZ)信号的相关性却鲜为人知。在这里,我们报道了Ryk通过非规范的Wnt信号触发的依赖β-arrestin 2(βARR2)的内吞过程来调节非洲爪哇会聚延伸(CE)运动。在莱氏X.laevis原肠发育过程中,βarr2介导的Fz7和蓬乱的内吞作用(dvl/dsh)实际上发生在背缘区组织中,该组织积极参与非典型的Wnt信号。非典型的Wnt11/Fz7介导的Dsh内吞作用需要细胞膜蛋白Ryk。RYK与WNT11和βARR2相互作用,与Fz7协同介导WNT11刺激的Dsh的内吞作用,并在CE运动中传递非典型的Wnt信号。相反,Ryk和Wnt11的缺失阻止了背缘区组织的Dsh内吞作用。我们的研究表明,Ryk在调节X.laevis CE运动中,对非规范的Wnt/Fz介导的内吞作用起着重要的调节作用。
The single-pass transmembrane protein Ryk (atypical receptor related tyrosine kinase) functions as a Wnt receptor. However, Ryk's correlation with Wnt/Frizzled (Fz) signaling is poorly understood. Here, we report that Ryk regulates Xenopus laevis convergent extension (CE) movements via the β-arrestin 2 (βarr2)-dependent endocytic process triggered by noncanonical Wnt signaling. During X. laevis gastrulation, βarr2-mediated endocytosis of Fz7 and dishevelled (Dvl/Dsh) actually occurs in the dorsal marginal zone tissues, which actively participate in noncanonical Wnt signaling. Noncanonical Wnt11/Fz7-mediated endocytosis of Dsh requires the cell-membrane protein Ryk. Ryk interacts with both Wnt11 and βarr2, cooperates with Fz7 to mediate Wnt11-stimulated endocytosis of Dsh, and signals the noncanonical Wnt pathway in CE movements. Conversely, depletion of Ryk and Wnt11 prevents Dsh endocytosis in dorsal marginal zone tissues. Our study suggests that Ryk functions as an essential regulator for noncanonical Wnt/Fz-mediated endocytosis in the regulation of X. laevis CE movements.
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