脊椎动物细胞对毛和外毛cAMP进行不同的解释
Melissa E Truong1, Sara Bilekova2, Semil P Choksi1
1Department of Biochemistry and Biophysics, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA 94158, USA.
Cell
|May 1, 2021
概括
细胞在初级和细胞质中进行信号分化. 状循环AMP (cAMP) 通过特定的蛋白激酶A (PKA) 池抑制了对的信号传递,从而显示出空间信号的分辨性.
科学领域:
- 细胞生物学
- 分子信号
- 器官的功能
背景情况:
- G蛋白结合受体 (GPCRs) 和子通路组件在初级眼中发现.
- 主皮对于细胞信号传输至关重要.
- GPCR信号发生在主毛内外.
研究的目的:
- 确定细胞是否区分位于主要毛中的G蛋白结合受体 (GPCR) 与外部受体的信号.
- 检查眼和眼外循环AMP (cAMP) 是否传输不同的信息.
- 识别细胞用于区分亚细胞信号事件的机制.
主要方法:
- 在特定的亚细胞位置控制循环AMP (cAMP) 生成的工程光遗传和化学遗传工具.
- 在斑马鱼和哺乳动物细胞模型中产生了相同数量的毛和细胞质cAMP.
- 使用建模来了解不同细胞几何形状对效应器激活的影响.
- 鉴定并进行功能测试的蛋白激酶A (PKA) 状和外状池.
主要成果:
- 细胞cAMP,但不是细胞质cAMP,抑制了刺信号传递.
- 和细胞体的不同细胞形状被建议以差异地激活局部效应器.
- 在皮内发现了一种特定的蛋白激酶A (PKA) 池.
- 阻断状PKA,但不阻断外状PKA,激活了Hedgehog信号,并逆转了状cAMP效应.
结论:
- 细胞可以区分状和状循环AMP (cAMP) 信号.
- 功能和空间上不同的蛋白激酶A (PKA) 池调解了这种细胞歧视.
- 不同的亚细胞池传递独特的信息, 影响下游的信号通路,
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