蛋白质上层结构的金属介导自组装:二次相互作用对蛋白质寡合化和聚合的影响
Eric N Salgado1, Richard A Lewis, Jasmin Faraone-Mennella
1Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
Journal of the American Chemical Society
|April 22, 2008
概括
像盐桥这样的二次相互作用对于引导金属诱导的蛋白质自我组装成特定结构至关重要. 这一发现有助于控制复杂生物系统的蛋白质-蛋白质相互作用.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 超分子化学 超分子化学
背景情况:
- 蛋白质可以通过金属协调引导自我组装成超分子结构.
- 控制蛋白质寡合化是设计复杂生物组件的关键.
研究的目的:
- 为了研究二次相互作用在金属诱导蛋白质自组合中的作用.
- 确定特定的氨基酸残留物如何影响离散蛋白质复合物的形成与聚合物的形成.
主要方法:
- 具有特定突变的细胞染色体cb562变体的工程.
- 结晶学分析以确定蛋白质结构.
- 用水力动力学测量来评估复杂的形成和尺寸.
主要成果:
- 一个单一的盐桥架氨酸残留物被确定为指导组装的关键.
- 这种残留物确定了细胞染色体cb562是否形成一个离散的四基复合物或异质聚合物.
- 没有二次相互作用指导,仅金属协调是不够的.
结论:
- 二次相互作用,如盐桥,对于特定的,金属引导的蛋白质自我组装是必不可少的.
- 这种对蛋白质-蛋白质相互作用 (PPI) 的精确控制可以构建复杂的蛋白质超结构.
- 这些发现为选择性控制涉及蛋白质结合的细胞过程提供了一条途径.
相关概念视频
Protein Folding
Overview
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Folding
Overview
Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Organization
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
The primary structure of a protein is its amino acid sequence.


