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相关概念视频

Reporter Genes02:11

Reporter Genes

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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G Protein–Coupled Receptors (GPCRs) are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to various stimuli. GPCRs regulate critical physiological pathways and are excellent drug targets for treating diseases such as diabetes, cancer, obesity, depression, or Alzheimer's. Nearly 35% of approved drugs implement their therapeutic effects by selectively interacting with specific GPCRs.
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G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
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Optimizing the Genetic Incorporation of Chemical Probes into GPCRs for Photo-crosslinking Mapping and Bioorthogonal Chemistry in Live Mammalian Cells
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在真核细胞LEXSY系统中的功能GPCR表达.

Aleksandra Luginina1, Ivan Maslov2, Polina Khorn1

  • 1Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, Russia.

Journal of molecular biology
|October 8, 2023
PubMed
概括
此摘要是机器生成的。

在Leishmania tarentolae (LEXSY) 的真核系统有效地产生G蛋白合受体 (GPCRs) 用于结构研究. 莱克西提供了比昆虫细胞更高的产量来产生腺A2A受体,这是一个关键的药物标.

关键词:
与G蛋白结合的受体是G蛋白结合的受体.莱什曼尼亚斑虫 (Leishmania tarentolae) 是一种斑虫.蛋白质的生物物理表征.再组合的表达方式.单个分子的Förster共振能量转移.

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科学领域:

  • 膜蛋白结构生物学 结构生物学
  • 药物的发现和开发.
  • 细胞表达系统的表达系统.

背景情况:

  • G蛋白结合受体 (GPCRs) 是一种主要的药物点类型,对于理解细胞信号来说至关重要.
  • 对GPCR的结构研究对于合理的药物设计至关重要,但大规模的重组生产仍然是一个重大挑战.
  • 目前的表达系统通常面临GPCR产量和稳定性的限制,阻碍了结构性确定.

研究的目的:

  • 评估Leishmania tarentolae (LEXSY) 的真核表达系统,以产生G蛋白结合受体 (GPCR).
  • 将LEXSY与已建立的昆虫细胞系统进行GPCR生产的比较,重点是产量,纯度和功能完整性.
  • 评估LEXSY作为GPCR结构生物学可扩展平台的适用性.

主要方法:

  • 人类腺A2A受体 (A2AAR) 在LEXSY真核生物系统中的重组表达.
  • 从LEXSY中净化A2AAR,并与昆虫细胞中产生的A2AAR进行比较.
  • 纯化的A2AAR的表征,包括纯度,稳定性和带诱导的形状变化.

主要成果:

  • 与昆虫细胞表达相比,LEXSY系统显示了A2AAR的显著更高的蛋白质产量.
  • 从这两种系统中净化的A2AAR表现出可比的纯度,稳定性,并表现出类似的联体诱导的形状变化和结构动态.
  • 莱克西在产生适合结构研究的功能性GPCR方面被证明是有效的.

结论:

  • 利什曼亚 (LEXSY) 核细胞系统是大规模生产G蛋白结合受体的非常有前途的平台.
  • 对于GPCR结构研究,LEXSY在蛋白质产量方面比传统的昆虫细胞系统具有显著的优势.
  • 这一发现支持LEXSY在结构生物学和针对GPCRs的药物发现工作中的更广泛应用.