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相关概念视频

GPCRs Regulate Adenylyl Cylase Activity01:09

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Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
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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...
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Regulation of the Unfolded Protein Response01:31

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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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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
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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.
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相关实验视频

Updated: May 22, 2025

Site Specific Lysine Acetylation of Histones for Nucleosome Reconstitution using Genetic Code Expansion in Escherichia coli
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对cGAS-STING路径的规定

Bing Zhang1, Pengbiao Xu1, Andrea Ablasser1,2

  • 1Global Health Institute, Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland;

Annual review of immunology
|March 14, 2025
PubMed
概括
此摘要是机器生成的。

循环GMP-AMP合成酶 (cGAS) -cGAMP-STING通路防御病原体,但需要调节以防止自我DNA激活. 了解它的检查点是操纵健康和疾病中DNA触发免疫力的关键.

关键词:
检测DNA的感应器刺痛是一种刺痛.cGAS 是一个气体.循环二核酸是循环的二核酸.免疫系统的恒常性.这是先天的免疫力.

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科学领域:

  • 这是天生的免疫力.
  • 通过DNA传感途径进行检测.
  • 免疫学 免疫学 免疫学

背景情况:

  • 这种cGAS-cGAMP-STING通路对于对病原体的天生的免疫防御至关重要.
  • 这一途径由DNA激活,导致免疫反应.
  • 精确的调节是必要的,以防止自我DNA触发这种途径,保持免疫平衡.

研究的目的:

  • 探索cGAS-cGAMP-STING路径的监管机制. 为了探索cGAS-cGAMP-STING路径的监管机制.
  • 了解免疫系统如何区分自我与非自我DNA.
  • 调查通路调节失调在炎症条件和抗瘤免疫中的影响.

主要方法:

  • 审查关于cGAS-cGAMP-STING信号的现有文献.
  • 对控制路径的结构和细胞检查点的分析.
  • 检查保护机制在免疫耐受性中的作用.

主要成果:

  • cGAS-cGAMP-STING通路需要严格的监管,因为它本质上无法区分自我与非自我DNA.
  • 保护机制对于维持对自身DNA的耐受性和防止异常激活至关重要.
  • 破坏这些防护措施可能会导致炎症性疾病,或者相反,促进抗瘤免疫力.

结论:

  • 了解cGAS-cGAMP-STING信号的监管检查点至关重要.
  • 在各种健康和疾病背景下,这些知识对于开发策略来操纵DNA触发的先天免疫是必不可少的.
  • 对这些机制的进一步研究可以打开新的治疗机会.