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Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
Published on: July 25, 2013
一个设计的蛋白质序列的上下文依赖的二次结构形成
1Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
Nature
|April 25, 1996
概括
非局部相互作用,而不仅仅是局部偏好,可以决定蛋白质的二次结构. 一个设计的设计了一个设计的设计.
科学领域:
- 蛋白质结构和折叠动态.
- 生物物理学和分子生物学.
背景情况:
- 蛋白质的二次结构 (α螺旋和β片) 是蛋白质折叠的关键.
- 氨基酸对二次结构的倾向受到局部和非局部因素的影响.
研究的目的:
- 研究非局部因素对蛋白质二次结构形成的影响.
- 设计和测试一个二次结构是上下文依赖的序列.
主要方法:
- 设计了一个11个氨基酸的"黑"序列.
- 将序列插入蛋白质G (GB1) 的IgG结合域内的不同位置.
- 使用生物物理标准评估蛋白质折叠和结构.
主要成果:
- "黑"序列采用了一个alpha-helix在一个位置和一个β-sheet在另一个位置.
- 由此产生的两种蛋白质 (大白α和大白β) 都表现出与原生蛋白质类似的结构.
- 证明非局部相互作用可以确定显著长度的二次结构.
结论:
- 非局部相互作用在确定蛋白质二次结构方面发挥着至关重要的作用.
- 三级相互作用可能是蛋白质折叠和整体结构的主导因素.
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Protein Folding
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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.
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
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Protein Structure Is Critical to Its Biological Function
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