同源域的无序尾巴通过提供折叠和特定结合之间的权衡来促进DNA识别
Agnes Tóth-Petróczy1, Istvan Simon, Monika Fuxreiter
1Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel.
Journal of the American Chemical Society
|November 19, 2009
概括
家庭主体蛋白质的无序N端尾 (N尾) 通过定蛋白质并促进特定相互作用来增强DNA结合. 这种飞机制提高了DNA结合的速度和强度.
科学领域:
- 分子生物学分子生物学
- 生物物理学的生物物理.
- 计算生物学 计算生物学
背景情况:
- 宿主体转录因子调节基因表达.
- 无序的N端尾 (N尾) 影响DNA结合的特异性.
- 参与DNA结合的N-尾的确切机制尚不清楚.
研究的目的:
- 调查混乱的N-尾在家庭主体-DNA相互作用中的作用.
- 阐明N尾影响结合亲和力和特异性的机制.
- 了解蛋白质折叠和DNA结合之间的合.
主要方法:
- 粗粒度分子动力学模拟. 粗粒度分子动力学模拟.
- 对原生蛋白-DNA复合物的分析.
- 研究了Antp和NK-2的主域.
主要成果:
- 无序的N尾减少了自由蛋白的稳定性,但在DNA结合时增加了稳定性.
- N-tails将家庭主域在DNA上,加速特定相互作用的形成.
- 一个涉及静电力和释放水的"飞"机制增强了结合动力学和亲和力.
结论:
- N-tails对于高效和特定的DNA结合至关重要.
- 调节N尾变异的顺序转换允许微调DNA结合强度.
- N-尾的无序性质是改善DNA结合热力学和动力学的关键.
相关概念视频
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Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...


