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相关概念视频

Protein-protein Interfaces02:04

Protein-protein Interfaces

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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...
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Protein Complexes with Interchangeable Parts01:57

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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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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Author Spotlight: A Computational Approach to Decipher Amino Acid Preferences in Multispecific Protein-Protein Interactions
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蛋白质与蛋白质相互作用的进化重编程

Eyal Akiva1, Patricia C Babbitt2

  • 1Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94158, USA.

Cell
|October 27, 2015
PubMed
概括

研究人员使用毒素-抗毒素模型研究了蛋白质-蛋白质相互作用的演变. 他们发现中介性蛋白质可能促进进化轨迹,避免非交互状态.

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科学领域:

  • 进化生物学
  • 分子生物学
  • 生物化学

背景情况:

  • 蛋白与蛋白的相互作用对细胞功能至关重要.
  • 了解PPI的进化途径对于理解生物复杂性至关重要.

研究的目的:

  • 研究蛋白质与蛋白质相互作用的进化轨迹.
  • 确定可能促进新型或修改后的PPI发展的机制.

主要方法:

  • 构建和深度测序突变库.
  • 使用毒素-抗毒素系统作为研究PPI演变的模型.

主要成果:

  • 确定了PPI可能的进化途径.
  • 证据表明,乱交的中间蛋白质可以促进相互作用状态之间的过渡.
  • 在进化过程中观察到避免非互动状态.

结论:

  • 蛋白与蛋白相互作用的演变可能遵循适用于各种生物系统的一般原则.
  • 在进化过渡过程中,杂交的中间体起着重要作用.
  • 这些发现有助于理解酶进化和生物相互作用进化的更广泛原则.