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相关概念视频

Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
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Ligand Binding Sites02:40

Ligand Binding Sites

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
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Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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Ligand Binding and Linkage00:49

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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 Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

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Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
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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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相关实验视频

Updated: May 2, 2026

Nuclear Magnetic Resonance Spectroscopy for the Identification of Multiple Phosphorylations of Intrinsically Disordered Proteins
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Nuclear Magnetic Resonance Spectroscopy for the Identification of Multiple Phosphorylations of Intrinsically Disordered Proteins

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14-3-3的结构基础是:类的结合特异性.

M B Yaffe1, K Rittinger, S Volinia

  • 1Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA.

Cell
|January 15, 1998
PubMed
概括
此摘要是机器生成的。

研究人员确定了14-3-3蛋白家族的两个关键结合基因 (RSXpSXP和RXY/FXpSXP),这对细胞信号传递至关重要. 这些发现揭示了14-3-3蛋白与其他分子的相互作用.

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科学领域:

  • 分子生物学分子生物学
  • 蛋白质生物化学 蛋白质生物化学
  • 细胞信号传递 细胞信号传递

背景情况:

  • 14-3-3蛋白家族在调解信号传导通路方面发挥着至关重要的作用.
  • 这些蛋白质通过结合含有素的特定标蛋白来起作用.
  • 了解这些相互作用是解读蜂通信网络的关键.

研究的目的:

  • 识别和描述14-3-3蛋白家族所识别的结合基因.
  • 为了阐明14-3-3蛋白质-连接体相互作用的结构基础.
  • 探索这些相互作用对细胞信号传递机制的影响.

主要方法:

  • 利用以素为导向的类库来探测哺乳动物和酵母14-3-3蛋白质.
  • 确定了14-3-3zeta复合体的晶体结构,具有素素图案.
  • 在晶体结构中分析了蛋白相互作用.

主要成果:

  • 确定了两个主要的14-3-3结合基因:RSXpSXP和RXY/FXpSXP.
  • 在14-3-3zeta复合体中观察到特定的形状,包括一个cis-conformation proline残留物.
  • 证明14-3-3二聚体结合于双联索素基因,这表明一种双酸结合机制.

结论:

  • 已识别的基因在已知的14-3-3结合蛋白中普遍存在.
  • 结构数据为观察到的类库结果提供了分子基础.
  • 双酸与联动因子的关联代表了Raf,BAD和Cbl.等蛋白质的显著信号机制.