德拉珀依赖性质细胞活性是由Src和Syk家族激酶信号传递介导的
Jennifer S Ziegenfuss1, Romi Biswas, Michelle A Avery
1Department of Neurobiology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, Massachusetts 01605-2324, USA.
Nature
|April 25, 2008
概括
德罗索菲拉的德雷珀受体通路促进细胞碎片和细胞亡细胞被质细胞吞. 这种古老的信号级联涉及氨酸激酶,揭示了跨物种细胞清除的保存机制.
科学领域:
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
背景情况:
- 细胞化 (phagocytosis) 是一种从无脊椎动物到哺乳动物的保存过程.
- CED-1/Draper通路对于清除各种形式的"改造自我"至关重要,包括细胞碎片和退化的轴突.
- 了解德雷珀介导的细胞分裂的分子机制是理解细胞清除的关键.
研究的目的:
- 为了阐明Drosophila Draper受体下游的分子参与者和信号级联.
- 研究氨酸激酶在Draper介导的轴突碎片和神经元尸体的细胞化中的作用.
- 将德雷珀信号通路与哺乳动物免疫受体信号进行比较.
主要方法:
- 生物化学测试以确定德雷珀,鱼和Src42A之间的蛋白质相互作用.
- 在Drosophila体内进行体内研究,以评估Shark和Src42A对Draper介导信号的必要性.
- 对德雷珀酸化和质细胞招募到切断的轴突的分析.
主要成果:
- 一种氨酸激酶Drosophila Shark通过一种基于免疫受体氨酸的激活动机 (ITAM) 直接与Draper结合.
- 鱼活动对于Draper介导的质膜对轴突的招募和碎片的细胞化至关重要.
- Src家族激酶Src42A增强了德雷珀酸化,对质细胞功能至关重要.
结论:
- 带与德雷珀的结合启动了一个信号级联,涉及Src42A依赖的德雷珀酸化,鱼结合和通路激活.
- 德雷珀-Src42A-鱼相互作用反映了哺乳动物免疫受体-SFK-Syk信号通路.
- 德雷珀作为一个古老的免疫受体起作用,利用ITAM-domain-SFK-Syk级联用于修改自体的细胞化.
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