Fused has evolved divergent roles in vertebrate Hedgehog signalling and motile ciliogenesis.

Fused has evolved divergent roles in vertebrate Hedgehog signalling and motile ciliogenesis.
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DOI:
10.1038/nature07883
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发表时间:
2009-05-07
期刊:
影响因子:
64.8
通讯作者:
Chuang, Pao-Tien
Chuang, Pao-Tien
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wilson, Christopher W.;Nguyen, Catherine T.;Chen, Miao-Hsueh;Yang, Jehn-Hsiahn;Gacayan, Rhodora;Huang, Jie;Chen, Jau-Nian;Chuang, Pao-Tien

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Hedgehog(Hh)信号传导对于胚胎发生的多个方面是必不可少的。在果蝇中,Hh转导由胞质信号复合物介导,所述胞质信号复合物包括推定的丝氨酸苏氨酸激酶Fused(Fu)和驱动蛋白Costal 2(Cos2),但Fu在哺乳动物中的Hh信号转导中不起保守作用。小鼠Fu突变体是可行的,似乎正常响应Hh信号。在这里,我们表明,小鼠傅是必不可少的中央对(CP)的能动,9+2纤毛装置的建设,并提供了一种新的模型,人类原发性纤毛运动障碍。我们发现,小鼠Fu物理相互作用Kif27,哺乳动物Cos2的直系同源物,并连接Fu的CP装置的已知结构组件,提供证据的第一个监管组件参与CP建设。我们还证明了斑马鱼Fu是Kupffer囊泡中Hh信号传导和纤毛生物发生所必需的。小鼠Fu拯救了斑马鱼中的Hh依赖性和独立性缺陷。我们的研究结果描绘了一个新的途径CP装置组装,确定共同的调节Hh信号和能动纤毛发生,并增加洞察Hh级联的演变。
Hedgehog (Hh) signaling is essential for multiple aspects of embryogenesis. In Drosophila, Hh transduction is mediated by a cytoplasmic signaling complex that includes the putative serinethreonine kinase Fused (Fu) and the kinesin Costal 2 (Cos2), yet Fu does not play a conserved role in Hh signaling in mammals. Mouse Fu mutants are viable and appear to respond normally to Hh signaling. Here we show that mouse Fu is essential for construction of the central pair (CP) apparatus of motile, 9+2 cilia and offers a novel model of human primary ciliary dyskinesia. We found that mouse Fu physically interacts with Kif27, a mammalian Cos2 ortholog, and linked Fu to known structural components of the CP apparatus, providing evidence for the first regulatory component involved in CP construction. We also demonstrated that zebrafish Fu is required both for Hh signaling and cilia biogenesis in Kupffer’s vesicle. Mouse Fu rescued both Hh-dependent and independent defects in zebrafish. Our results delineate a novel pathway for CP apparatus assembly, identify common regulators of Hh signaling and motile ciliogenesis, and add insight into evolution of the Hh cascade.
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