乌比基因酶SCFFbw7对抗了阿波性JNK信号传递
Abdolrahman S Nateri1, Lluís Riera-Sans, Clive Da Costa
1Mammalian Genetics Laboratory, Cancer Research UK, London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London WC2A 3PX, UK.
概括
E3结合酶SCF (Fbw7) 控制了c-Jun的稳定性,防止了神经毒性. 通过降解化c-Jun,SCF(Fbw7) 保护神经元免受Jun N-终端激酶 (JNK) 诱导的亡.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞信号传输 细胞信号传输
背景情况:
- Jun N-终端酶 (JNKs) 在神经元过程中起着至关重要的作用,包括微管组装和亡.
- 通过JNK介导的神经毒性与转录因子c-Jun.的酸化有关.
- 调节c-Jun稳定性的精确机制及其在神经毒性中的作用尚未完全理解.
研究的目的:
- 研究E3酶在调节神经元中酸化c-Jun的稳定性中的作用.
- 为了确定SCF(Fbw7) 如何影响参与神经元亡的JNK信号通路.
- 阐明神经元对JNK诱导的神经毒性的保护机制.
主要方法:
- 利用神经元细胞模型研究蛋白质稳定性和降解途径.
- 采用了诸如西式涂抹和免疫沉等技术来评估c-Jun酸化和无处不在的化.
- 研究了Fbw7枯竭对AP1转录因子活性和神经元亡的影响.
主要成果:
- 确定了E3结合酶SCF(Fbw7) 作为神经元中酸化c-Jun稳定性的关键调节者.
- 证明SCF{Fbw7) 无处不在化c-Jun,将其作为降解的目标.
- 显示Fbw7耗尽导致c-Jun积累,增强AP1活动,增加神经元亡.
结论:
- SCF ((Fbw7) 作为JNK信号的下游c-Jun-依赖的亡途径的关键负调节者.
- 这种调节机制使神经元能够保持对JNK活动潜在的神经毒性水平的耐受性.
- 针对SCF ((Fbw7) -c-Jun轴可能为涉及JNK通路失调的神经退行性疾病提供治疗策略.
更多相关视频
相关概念视频
NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
MAPK Signaling Cascades
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
The JAK-STAT Signaling Pathway
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
cAMP-dependent Protein Kinase Pathways
Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
NF-kB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...


