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相关概念视频

Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

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Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
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Cooperative Allosteric Transitions01:58

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Cooperative Allosteric Transitions01:58

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Allosteric Proteins-ATCase01:19

Allosteric Proteins-ATCase

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Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to  N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
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GPCR Desensitization01:12

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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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Allosteric Regulation01:08

Allosteric Regulation

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Allosteric regulation of enzymes occurs when the binding of an effector molecule to a site that is different from the active site causes a change in the enzymatic activity. This alternate site is called an allosteric site, and an enzyme can contain more than one of these sites. Allosteric regulation can either be positive or negative, resulting in an increase or decrease in enzyme activity. Most enzymes that display allosteric regulation are metabolic enzymes involved in the degradation or...
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相关实验视频

Updated: Jan 30, 2026

Monitoring GPCR-β-arrestin1/2 Interactions in Real Time Living Systems to Accelerate Drug Discovery
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一个GPCR-G蛋白-β-arrestin超级复合体,由一个多功能全调节器启用.

Guodong He1, Qinxin Sun1, Xinyu Xu1

  • 1State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Pharmaceutical Sciences, Tsinghua University, Beijing, China; Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Tsinghua University, Beijing, China.

Cell
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PubMed
概括

研究人员发现了atazanavir,一种新型药物,可以稳定G蛋白结合受体 (GPCR) 复合体. 这种化合物能够持续发出信号,并激活多个GPCRs,提供新的治疗开发途径.

关键词:
与G蛋白结合的受体是G蛋白结合的受体.在GPCR信号传输转导过程中.在GPCR结构中,GPCR的结构是:在GPCRs中,GPCRs是指GPCR.低温电磁波冷却器 (Cryo-EM) 是一个非常好的方法.发现药物的发现.这是一个巨型综合体.积极的全osteric调节器.持续的信号传输.

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科学领域:

  • 药理学 药理学是指药理学的学科.
  • 分子生物学分子生物学
  • 药物发现 药物发现 药物发现

背景情况:

  • G蛋白结合受体 (GPCRs) 是关键的药物标,大约三分之一的临床药物对它们起作用.
  • 传统上,GPCR信号传递涉及单独的G蛋白和β-arrestin通路.
  • 需要新的策略来调节GPCR活性以获得独特的药理结果.

研究的目的:

  • 通过独特的机制识别可调节GPCR活性的新型配体.
  • 探索GPCR-G蛋白-β-arrestin复合物的稳定,以持续信号传递.
  • 发现具有广泛适用于不同GPCRs的化合物.

主要方法:

  • 生存压力选择 (SPS) 方法的开发和应用,这是一个高通量平台,用于发现GPCR激动剂.
  • 鉴定了一种稳定GPCR-G蛋白-β-arrestin大复合物的全性联体.
  • 测试该化合物的泛受体激活在A家族的GPCR中,包括GPR119,β1AR和β2AR.

主要成果:

  • 发现一种被确定为阿塔扎纳维尔的全osteric 配体能够稳定一个 GPCR-G 蛋白-β-arrestin 超级复合体.
  • 这种稳定导致受体内部化后持续的受体信号传递.
  • 阿塔萨纳维尔在多个家族A GPCR中表现出泛受体激活,包括GPR119,β1AR和β2AR.

结论:

  • 发现了一种新的GPCR调节机制,涉及GPCR-G蛋白-β-arrestin大复合物的稳定.
  • 这种机制允许持续的GPCR信号传输,并且在各种GPCR中具有广泛的适用性.
  • 这些发现为开发针对GPCRs的药物开辟了新的治疗途径.