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相关概念视频

Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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 to...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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 to...
Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...

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相关实验视频

Updated: May 19, 2026

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
09:35

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

人类可溶性蛋白质复合物的普查.

Pierre C Havugimana1, G Traver Hart, Tamás Nepusz

  • 1Banting and Best Department of Medical Research, Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada.

Cell
|September 4, 2012
PubMed
概括

研究人员绘制了13,993个人类蛋白质相互作用的地图,揭示了622个蛋白质复合体. 较小的复合体不太了解,似乎是最近的进化创新,为细胞过程提供了洞察力.

更多相关视频

Protein Complex Affinity Capture from Cryomilled Mammalian Cells
10:37

Protein Complex Affinity Capture from Cryomilled Mammalian Cells

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Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry
14:58

Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry

Published on: November 12, 2012

相关实验视频

Last Updated: May 19, 2026

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
09:35

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

Protein Complex Affinity Capture from Cryomilled Mammalian Cells
10:37

Protein Complex Affinity Capture from Cryomilled Mammalian Cells

Published on: December 9, 2016

Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry
14:58

Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry

Published on: November 12, 2012

科学领域:

  • 蛋白质组学是指蛋白质组学.
  • 人类生物学 人类生物学
  • 分子相互作用分子相互作用.

背景情况:

  • 细胞功能依赖于稳定的蛋白质结合.
  • 了解人类蛋白质复合体的完整网络是不完整的.
  • 现有的知识差距阻碍了功能和机制的洞察力.

研究的目的:

  • 系统地识别人体细胞中的物理相互作用和蛋白质复合体.
  • 创建一个可溶性人类蛋白相互作用的高可靠性网络.
  • 描述已识别的蛋白质复合体的特性和进化背景.

主要方法:

  • 采用了一种整合性的全球蛋白质基因分析方法.
  • 采用染色学分离培养人类细胞提取物成1000多个部分.
  • 使用定量双重质谱法 (MS/MS) 分析的分数.

主要成果:

  • 在3,006个蛋白质中确定了一个由13,993个高保证度物理相互作用组成的网络.
  • 报告了622个与核心生物过程相关的假定蛋白质复合体.
  • 观察到较小的复合体 (≤5个子单元) 的注释和进化限制较小.

结论:

  • 该研究提供了人类蛋白质-蛋白质相互作用和复合物的全面地图.
  • 较小的蛋白质复合体代表了潜在的最近的功能创新.
  • 这些发现有助于了解疾病机制,并对未表征的蛋白质进行注释.