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相关概念视频

Protein and Protein Structure02:15

Protein and Protein Structure

79.3K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
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Protein Folding01:22

Protein Folding

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Overview
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Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

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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.
These groups modify specific amino acids in a protein....
6.8K

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相关实验视频

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Combining Non-reducing SDS-PAGE Analysis and Chemical Crosslinking to Detect Multimeric Complexes Stabilized by Disulfide Linkages in Mammalian Cells in Culture
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Combining Non-reducing SDS-PAGE Analysis and Chemical Crosslinking to Detect Multimeric Complexes Stabilized by Disulfide Linkages in Mammalian Cells in Culture

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与二硫化物结合的p53-衍生二元体的结构性表征

Magdalena C DiGiorno1, Nisansala Vithanage2, Clara G Victorio1

  • 1Fordham University.

Research square
|July 29, 2024
PubMed
概括

二硫化物键驱动二元化,形成稳定的反平行二元体. 氨基酸替代揭示了控制高阶结构的氨酸和氨酸等关键残留物,使得可调节的分子架构能够针对蛋白质.

科学领域:

  • 生物化学和分子生物学
  • 结构生物学 结构生物学
  • 类化学 类化学

背景情况:

  • 二硫化键对于修改和蛋白质结构和功能至关重要.
  • 之前的研究表明,p53衍生比斯提醇的轻度氧化产生了排他性的二硫化物结合二聚合物.

研究的目的:

  • 为了研究控制二元化的内在因素.
  • 阐明二硫酸结合寡合化的结构基础.
  • 探索可调节分子架构在化物设计中的潜力.

主要方法:

  • 用氨基酸替代的变体合成.
  • 循环二重化 (CD) 光谱用于结构分析.
  • 用1.0 Å分辨率的X射线晶体学进行详细的结构确定.

主要成果:

  • 在位置6和10的白氨酸残留物对于稳定的二硫化物结合二聚体形成至关重要.
  • 晶体结构揭示了一个LxxLL二极管接口与正规的旋进入洞包装.
  • 观察到的高阶寡合体 (二次体的二次体,二次体的四次体),由特定残留物 (Phe3,Trp7,Leu10) 介导.

结论:

关键词:
变质化变质化 (Dimerization Dimerization) 是一种变质化的过程.硫化二氧化物是二硫化物中的一种.折叠可以折叠.结构 结构 是一个结构.

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Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides
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Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides

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  • 二元化是通过特定的氨基酸残留物内在控制的.
  • 展示了基于氨酸丰富接口的强大和可调节的分子架构.
  • 这些发现支持开发基于新的蛋白质向和功能调节的新策略.