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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

10.9K
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...
10.9K
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

18.0K
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
18.0K
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

2.5K
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.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

5.8K
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,...
5.8K
Conserved Binding Sites01:49

Conserved Binding Sites

4.2K
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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相关实验视频

Updated: Jul 5, 2025

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells
00:08

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells

Published on: September 2, 2019

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人类Hsp70基质结合域识别不同的客户端蛋白质

Andrew J Ambrose1, Christopher J Zerio1, Jared Sivinski1

  • 1Department of Pharmacology and Toxicology, University of Arizona, Tucson, Arizona 85721, United States.

Biochemistry
|January 20, 2024
PubMed
概括
此摘要是机器生成的。

人类热冲击蛋白70 (Hsp70) 异型表现出明显的基质特异性,挑战J域含蛋白 (JDP) 作为多样性的唯一驱动因素的作用. 这一发现影响了癌症和神经退行性疾病的治疗策略.

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Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry
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Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry

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Studies of Chaperone-Cochaperone Interactions using Homogenous Bead-Based Assay
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Studies of Chaperone-Cochaperone Interactions using Homogenous Bead-Based Assay

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相关实验视频

Last Updated: Jul 5, 2025

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells
00:08

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells

Published on: September 2, 2019

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Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry
11:37

Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry

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Studies of Chaperone-Cochaperone Interactions using Homogenous Bead-Based Assay
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Studies of Chaperone-Cochaperone Interactions using Homogenous Bead-Based Assay

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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
  • 细胞应激反应的应激反应

背景情况:

  • 人类细胞拥有13种Hsp70蛋白质,基质特异性通常归因于含有蛋白质的J域 (JDP) 辅因子.
  • 以前的理解表明,JDPs主要决定Hsp70基质结合多样性.

研究的目的:

  • 为了研究8种正规的人类Hsp70异型体中的基质特异性.
  • 为了确定Hsp70s是否具有独立于JDPs的固有基质识别能力.

主要方法:

  • 用基阵列来描述Hsp70异型和基质之间的结合亲和关系.
  • 机器学习算法被开发用于预测基于阵列数据的Hsp70结合序列.
  • 在体内进行了使用*Escherichia coli* DnaK淘汰菌株和模拟Hsp70s的补充分析.

主要成果:

  • 对于特定的基质,在Hsp70异型中观察到截然不同的结合亲和力.
  • 机器学习揭示了新的Hsp70识别模式,这些模式不能通过简单的序列对齐来预测.
  • 人类的Hsp70异型不能补充热冲击*大肠杆菌*DnaK淘汰细胞,但具有DnaK基质结合域的模拟Hsp70可以.
  • 补充的差异与DnaJ结合无关.

结论:

  • 人类Hsp70异型具有内在的基质特异性,独立于JDPs.
  • Hsp70的基质结合域在确定体内功能方面发挥着至关重要的作用.
  • 了解Hsp70异型特异性对于开发针对癌症和神经退行症的向疗法至关重要.