相关实验视频
Updated: May 10, 2026

08:54
Bimolecular Fluorescence Complementation
Published on: April 15, 2011
蛋白重复基因在Fos蛋白中介于与Jun/AP-1的复合形成,并且是转化所需的
M Schuermann1, M Neuberg, J B Hunter
1Institut für Molekularbiologie und Tumorforschung (IMT), Philipps-Universität Marburg, Federal Republic of Germany.
Cell
|February 10, 1989
概括
细胞Fos蛋白通过氨酸拉链结构与Jun蛋白结合. 这种相互作用对于AP-1-依赖转录和细胞转化至关重要.
科学领域:
- 分子生物学分子生物学
- 蛋白质与蛋白质之间的相互作用
- 瘤发生的发生因子.
背景情况:
- 细胞和病毒Fos蛋白是关键的核蛋白.
- 它们与其他蛋白质形成复合体,包括转录因子AP-1/Jun.
- 了解这些相互作用对于理解基因调节和细胞过程至关重要.
研究的目的:
- 在Fos蛋白中绘制c-Jun的特定结合部位.
- 为了研究白残留在调解Fos-Jun相互作用中的作用.
- 为了将结合亲和力与转录激活和细胞转化等功能结果相关联.
主要方法:
- 蛋白的局部定向突变发生,特别针对白残留物.
- 使用结合试验对俊复合体形成的分析.
- 评估AP-1-依赖的转录活性和形态转换试验.
主要成果:
- 替代或改变了Fos中白氨酸残留的相位,显著减少或取消了Jun结合.
- 其他氨基酸的变化没有影响Fos-Jun结合.
- 突变的结合亲和力与它们激活AP-1-依赖转录和诱导形态转换的能力直接相关.
结论:
- 这项研究提供了强有力的证据,表明"氨酸拉链"图案调解了Fos和Jun蛋白之间的相互作用.
- 这种白氨酸拉链相互作用对于Fos的功能作用至关重要,包括转录调节和细胞转化.
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...
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...
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...
Laminins are the Adhesive Proteins of Basal Lamina
Laminins are heterotrimeric proteins with high molecular mass found in the extracellular matrix. Each laminin molecule is composed of three chains, viz. alpha, beta, and gamma, coded by five, four, and three paralogous genes, respectively. Laminins are categories based on the compositions of the three chains.
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
Intracellular Signaling Affects Focal Adhesions
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...

