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相关概念视频

Protein Complex Assembly02:41

Protein Complex Assembly

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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
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Protein Complex Assembly02:41

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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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Coat Assembly and GTPases01:33

Coat Assembly and GTPases

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Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
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Mechanism of Lamellipodia Formation01:31

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Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
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Disassembly of Intermediate Filaments01:35

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Intermediate filaments (IFs) do not undergo spontaneous disassembly. Enzymes, kinases, and phosphatases add and remove phosphates from specific sites to regulate their disassembly. The IF concentration in the cytoplasm also regulates the disassembly. If the concentration crosses a threshold, it activates the protein kinases in the vicinity, allowing the phosphorylation of IFs.
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Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
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Pacs1-Wdr37复杂组装和稳定性的结构基础

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    此摘要是机器生成的。

    Pacs1-Wdr37复杂结构揭示了Pacs1如何结合Wdr37,这对蛋白质稳定至关重要. Pacs1 中的神经发育突变不会破坏这个复合体,但可以提供治疗点.

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    科学领域:

    • 分子生物学分子生物学
    • 结构生物学 结构生物学
    • 细胞生物学 细胞生物学

    背景情况:

    • 酸酸集群分类蛋白1 (Pacs1) 是一种适应蛋白,参与细胞内贩运.
    • Pacs1与WD-重复蛋白37 (Wdr37) 形成复合体,这对淋巴细胞平衡至关重要.
    • 之前缺乏Pacs1-含复合体的验证结构.

    研究的目的:

    • 为了确定Pacs1-Wdr37复合体的冷电子显微镜结构.
    • 阐明Pacs1-Wdr37相互作用的结构基础及其对蛋白质稳定性的影响.
    • 为了研究一种致病性Pacs1突变 (R203W) 对复杂形成和疾病的影响.

    主要方法:

    • 低温电子显微镜 (cryo-EM) 用于确定Pacs1-Wdr37复杂结构.
    • 蛋白质与蛋白质相互作用和域界面的分析.
    • 结构同样性建模以确定潜在的脂结合部位.

    主要成果:

    • Pacs1-Wdr37复合体结构显示,Pacs1通过其林结合区域 (FBR) 结合Wdr37.
    • 这种相互作用对于Pacs1和Wdr37.7的稳定性和表达是至关重要的.
    • 致病性Pacs1 R203W突变不会破坏复合体的形成,但会影响蛋白质的稳定性,这表明了治疗途径.
    • Pacs1 FBR 显示了与突触胺 C2 域的结构同质性,表明它具有结合脂的新能力.

    结论:

    • 该研究定义了Pacs1-Wdr37复合组合和稳定的结构基础.
    • 研究结果为Pacs1介导的神经发育障碍提供了洞察力,并提出了潜在的治疗策略.
    • 通过脂结合提出了新的Pacs1功能在膜协会中.