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相关概念视频

Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
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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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Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Ligand Binding and Linkage00:49

Ligand Binding and Linkage

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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Mechanisms of Membrane Domain Formation00:59

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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
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内部动力学和模块化外围结合在刺激响应的3: 2宿主:客座复合体中.

Hang Yin1, Roselyne Rosas2, Stéphane Viel3,4

  • 1State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau, China.

Angewandte Chemie (International ed. in English)
|November 27, 2023
PubMed
概括

研究人员通过使用cucurbit[n]uril (CB[n]) 宏观循环和di-viologens.com使用更高的固体测量主机:客人综合体. 他们发现了独特的 3:2 CB[8] 复合体,具有动态性质和对刺激的反应性.

关键词:
复杂的综合体 复杂的综合体黄瓜比图里尔是一种.刺激是一种刺激.这是一个超分子的超分子.我们的小提琴学家

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科学领域:

  • 超分子化学 超分子化学
  • 宏观循环化学 宏观循环化学
  • 主持人:客人 化学

背景情况:

  • 1:1宿主:客人复合体的化学成分已经得到了很好的证实.
  • 更高的固体几何学 (寡合体) 复合体,特别是与过量宿主,在很大程度上是未被探索的.
  • 蛋白质寡合化导致细胞机械中的新功能.

研究的目的:

  • 为了研究更高的固体几何学宿主:客座综合体的形成和性质.
  • 探索库库尔比特[n]乌里尔 (CB[n]) 大循环在形成这种复合物的潜力.
  • 了解这些新型超分子组件的动态和响应行为.

主要方法:

  • 宿主:客座复合体的合成和表征,使用库库比特[n]uril (CB[n]) 宏循环和对称的线性二-viologens.
  • 研究复杂的固体几何学,结构动力学和水溶液中的自我分类特性.
  • 评估复合体对各种外部刺激的反应能力,包括化学物质,pH和氧化还原条件.

主要成果:

  • 在CB[n]宏循环和di-viologens之间形成了不寻常的3:2宿主:客座复合体.
  • 观察了显著的动态特性,包括宿主自我排序和外部环转位.
  • 基于3:2复合体的库库比特[8]乌里尔 (CB[8]) 的结构性可调性的证明.
  • 确认复合体对水中的化学,pH和氧化还原刺激的反应能力.

结论:

  • 黄瓜[n]uril宏循环可以形成更高的固态度,寡合主机:客人综合体.
  • 发现的 3:2 CB[8]:di-viologen 复合体表现出独特的动态和响应特征.
  • 这些发现扩大了对超分子复合体形成的理解,并突出了对刺激反应材料的潜在应用.