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Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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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 Proteins02:18

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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相关实验视频

Updated: Jan 12, 2026

Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells
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Author Spotlight: Evaluation of Protein-Condensate Dynamics in Live Human Cells

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编程细胞凝聚物用于生物材料,使用本质上是无序的蛋白质显示平台.

Rong Chang1, Hann X Tu1, Hongyu Ma2

  • 1Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115.

Proceedings of the National Academy of Sciences of the United States of America
|October 30, 2025
PubMed
概括

我们开发了一个新的平台,用于在细菌上显示内在无序的蛋白质 (IDP),从而实现可编程的自我组织和创建具有可调节性质的动态生物材料.

关键词:
细胞表面显示显示器本质上是无序的蛋白质.生活材料生活材料多细胞模式的形成

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相关实验视频

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科学领域:

  • 合成生物学 合成生物学
  • 生物材料工程 生物材料工程
  • 蛋白质工程是指蛋白质工程.

背景情况:

  • 自组织对于复杂的生物结构至关重要,但在合成系统中具有挑战性.
  • 内在无序的蛋白质 (IDP) 缺乏稳定的结构,是细胞自我组织的关键.
  • 工程可控制的多细胞材料需要精确控制细胞与细胞的相互作用.

研究的目的:

  • 提供一个可通用的平台,用于对大肠杆菌的高密度IDPs的显示.
  • 使用IDP设计可编程,自我组织的生物材料.
  • 为了证明对细胞凝聚物形成和宏观材料特性的动态控制.

主要方法:

  • 开发了使用CsgF作为E. coli表面显示的支架的内在无序蛋白质显示平台 (iDP^2).
  • 在细菌表面上缺乏稳定的三级结构的融合和呈现的IDP域.
  • 编程具有直角IDP的细胞以实现序列特异性分离并形成动态细胞凝聚物.
  • 研究的环境暗示 (离子强度,温度) 对凝聚液聚合状态的影响.
  • 通过挤出处理的冷凝物产生宏观细丝.

主要成果:

  • 在大肠杆菌上成功显示高密度的IDP,有利于无序序列.
  • 证明具有相分离倾向的IDP驱动动动态细胞凝结物形成.
  • 使用直角的IDP实现了混合细胞群体的序列特异分离,创造了空间有组织的生物组件.
  • 通过环境线索展示了凝结物聚合状态的动态调整性,可从IDP相位行为中预测.
  • 从冷凝物中生成宏观纤维,保持结构完整性和人口隔离.

结论:

  • 该iDP^2平台提供了一个可编程的框架,用于控制细胞与细胞的相互作用和工程生物材料.
  • 这种方法可以设计具有可定制性质的适应性,自我组织的生物系统.
  • 无序的蛋白质图案是创建响应和多细胞工程生物系统的多功能工具.