Integration of BMP and Wnt signaling via vertebrate Smad1/5/8 and Drosophila Mad.

Integration of BMP and Wnt signaling via vertebrate Smad1/5/8 and Drosophila Mad.
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DOI:
10.1016/j.cytogfr.2009.10.017
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发表时间:
2009-10
影响因子:
13
通讯作者:
De Robertis, E. M.
De Robertis, E. M.
中科院分区:
医学2区
文献类型:
--
作者:
Eivers, Edward;Demagny, Hadrien;De Robertis, E. M.

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骨形成蛋白模式的背腹轴的脊椎动物胚胎。Smad 1/5/8转导BMP信号,并接收来自MAPK和GSK 3的磷酸化输入。MAPK和GSK 3对Smad 1的磷酸化导致其多聚泛素化并转运到中心体,在中心体中被蛋白酶体降解。这些接头磷酸化通过缩短其持续时间来抑制BMP/Smad 1信号传导。Wnt负调节GSK 3活性,抑制BMP/Smad 1信号。值得注意的是,连接子磷酸化的Smad 1已被证明在细胞分裂过程中不对称地遗传。果蝇含有一个单一的Smad 1/5/8同源物,Mad,并通过GSK 3位点的磷酸化抗性突变来稳定,引起Wingless-like效应。我们在这里总结的意义连接磷酸化Smad 1/Mad的信号强度和持续时间,以及如何整合Wnt和BMP途径在细胞分化。
BMPs pattern the dorsal-ventral axis of vertebrate embryos. Smad1/5/8 transduces the BMP signal, and receives phosphorylation inputs from both MAPK and GSK3. Phosphorylation of Smad1 by MAPK and GSK3 result in its polyubiquitination and transport to the centrosome where it is degraded by the proteasome. These linker phosphorylations inhibit BMP/Smad1 signaling by shortening its duration. Wnt, which negatively regulates GSK3 activity, prolongs the BMP/Smad1 signal. Remarkably, linker-phosphorylated Smad1 has been shown to be inherited asymmetrically during cell division. Drosophila contains a single Smad1/5/8 homologue, Mad, and is stabilized by phosphorylation-resistant mutations at GSK3 sites, causing Wingless-like effects. We summarize here the significance of linker-phosphorylated Smad1/Mad in relation to signal intensity and duration, and how this integrates the Wnt and BMP pathways during cell differentiation.
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