阿克特是由Bag5通过单化到多化开关控制的
Ismael Bracho-Valdés1,2, Rodolfo Daniel Cervantes-Villagrana1,3, Yarely Mabell Beltrán-Navarro1
1Department of Pharmacology, Cinvestav-IPN. Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Mexico City 07360, Mexico.
International journal of molecular sciences
|December 23, 2023
概括
这项研究确定BAG5是Akt蛋白稳定性的关键调节者. BAG5促进了Akt的降解,根据生长因子的可用性影响细胞信号通路.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 氨酸-氨酸激酶Akt对于细胞生存,新陈代谢,增殖和迁移至关重要.
- 严格调节Akt活动和稳定性对于防止有害的细胞状况至关重要.
- 虽然通过酸化来调节Akt活动是可以理解的,但维持其稳定的机制不太清楚.
研究的目的:
- 为了研究BAG5的作用,一个陪伴调节器,在调节Akt的稳定性.
- 阐明Akt和BAG5之间的相互作用及其对Akt降解途径的影响.
主要方法:
- 描述BAG5作为一种新型的Akt交互体和基质.
- 在BAG5.5的反应中分析了Akt的泛化状态 (单泛化与多泛化).
- 在Hsp90抑制和Hsp70过度表达条件下的Akt降解的评估,BAG5参与.
- 对Akt-BAG5复合物的形成和解离动态的研究,以应对血清饥饿和HGF刺激.
- 在BAG5敲击和过度表达时Akt激活和降解的评估.
主要成果:
- BAG5充当了一种新型的相互作用者和基质,减弱了Akt的稳定性,与Hsp70.0.一起工作.
- BAG5促进了Akt的从单双化转换为多双化,增强了其降解.
- 在血清缺乏条件下,Akt-BAG5复合体形成,并在HGF刺激时解离,与BAG5酸化相关.
- BAG5的淘汰减少了Akt的降解并增强了其激活,而BAG5的过度表达则产生了相反的效果.
结论:
- 阿克特的稳定性和信号由BAG5.5动态调节.
- BAG5在控制Akt蛋白水平和活性方面发挥着关键作用,受生长因子的可用性影响.
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