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相关概念视频

NF-κB-dependent Signaling Pathway02:26

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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
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Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR...
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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...
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Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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相关实验视频

Updated: Jun 28, 2025

A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α
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N4BP1作为一个依赖于二分化的线性泛素读取器,它调节TNF信号传递.

Katarzyna W Kliza1,2, Wei Song3,4, Irene Pinzuti3

  • 1Institute of Biochemistry II, Goethe University School of Medicine, Frankfurt (Main), Germany. katarzyna.kliza@mpi-dortmund.mpg.de.

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此摘要是机器生成的。

结合NEDD4的蛋白1 (N4BP1) 作为一种新的线性泛素读者,调节炎症和细胞死亡. 其独特的二分化依赖模块 (LUBIN) 控制瘤亡因子受体1 (TNFR1) 信号持续时间.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学
  • 细胞生物学 细胞生物学

背景情况:

  • 瘤坏死因子受体1 (TNFR1) 信号传递对炎症和细胞死亡至关重要,与自身免疫性疾病和癌症相关的失调.
  • 已知NEDD4结合蛋白1 (N4BP1) 抑制炎症,但其精确的分子机制尚不清楚.

研究的目的:

  • 阐明使N4BP1能够抑制炎症的分子特性.
  • 研究N4BP1在调节TNFR1信号通路中的作用.

主要方法:

  • 生物化学测试以表征N4BP1的泛素结合能力.
  • 基于细胞的测试来评估N4BP1在TNFR1信号传递,NFκB激活和亡中的功能.
  • 在炎症和亡条件下分析N4BP1与信号复合物的相互作用.

主要成果:

  • N4BP1通过其独特的二分化依赖的泛素结合模块,称为LUBIN,作为一种新的线性泛素读取器.
  • 模态N4BP1优先识别线性无素,对NFκB信号进行负面调节.
  • N4BP1被招募到TNFR1信号复合体中,调节炎症信号持续时间并影响TNFα诱导的细胞死亡.
  • 在apoptotic条件下的caspase-8对N4BP1的蛋白质分解处理加速了apoptosis.

结论:

  • N4BP1二分化产生了一个独特的线性无素读取器 (LUBIN),对于调节TNFR1介导的炎症和细胞死亡至关重要.
  • N4BP1在及时协调控制炎症反应和编程细胞死亡方面发挥着至关重要的作用.