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与基化酶8A的14-3-3相互作用维持了PKA信号传递,并降低了MAPK通路的调节

Soumita Mukherjee¹, Somesh Roy¹, Shruti Mukherjee²

¹Department of Biological Sciences, Bose Institute, Kolkata, India.

The Journal of biological chemistry

|February 7, 2024

概括

14-3-3ζ作为一个分子开关,调节cAMP/PKA和MAPK通路之间的信号传输. 它与PDE8A结合,减少其活性,并影响细胞对刺激的反应.

科学领域:

细胞信号传输细胞信号传输
分子生物学分子生物学
生物化学生物化学

背景情况:

cAMP/PKA和MAPK通路对于细胞过程至关重要,并且受到严格监管.
二酶8A (PDE8A) 调节了cAMP/PKA和MAPK通路的作用.
涉及PDE8A的精确交叉交谈机制仍然不清楚.

研究的目的:

阐明PDE8A在调节cAMP/PKA和MAPK信号通路中的作用.
为了研究PDE8A和14-3-3ζ之间的相互作用.
将14-3-3ζ定义为交叉通话信号的潜在调节器.

主要方法:

酵母和哺乳动物细胞系统被用来研究蛋白质相互作用.
进行了酸化位点分析和生物物理特征分析.
进行了酶活性测定和信号通路分析.

主要成果:

发现PDE8A与14-3-3ζ相互作用,通过PKA激活和PDE8A酸化在Ser359.9增强.
14-3-3ζ结合降低了PDE8A的催化活性,对cAMP/PKA进行上调,对MAPK信号进行下调.
14-3-3ζ,PDE8A和RIα复合体的形成延迟了PKA信号失活.

结论:

14-3-3ζ通过PDE8A通过cAMP/PKA和MAPK路径之间作为分子开关.
这种相互作用调节PDE8A活动,并影响信号持续时间.
这些发现为细胞信号传输中交叉通话调节提供了一个新的机制.

关键词:

14-3-3 这是一个很好的时刻.在 CRAF 基因酶中,基激活蛋白激酶 (MAPK) 是一种激活蛋白激酶.基化酶是一种基化剂.蛋白质激酶A (PKA) 的作用.

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