编程蛋白质相位分离采用内在无序的精密块共聚合物样蛋白质的模块化库,创建动态细胞质细分化的动态细胞质细分
Matthias C Huber1, Andreas Schreiber2, Lara G Stühn3
1Institut für Pharmazeutische Technologie, Goethe-University Frankfurt, Max-von-Laue-Str. 9, D-60438, Frankfurt, Germany.
Biomaterials
|June 8, 2023
概括
科学家们使用液态液相分离 (LLPS) 设计了基于蛋白质的新型隔间. 这些人造无膜有机体控制分子流动和细胞的分裂,提供新的制药和合成生物学应用.
科学领域:
- 生物化学 生物化学
- 合成生物学 合成生物学
- 材料科学 材料科学 材料科学
背景情况:
- 控制生物系统中的分子组织对于细胞功能和药物开发至关重要.
- 无膜细胞器 (MOs) 通过液态分离 (LLPS) 调节细胞内组织,分离内在无序的蛋白质 (IDPs).
- 基于LLPS的人工隔间提供了一种新的方法来管理化学流量和分离体外和体内生物.
研究的目的:
- 设计和设计可编程的基于蛋白质的隔间,用于控制细胞内组织.
- 通过使用类弹性蛋白 (ELP) 阻断共聚合物,研究人工无膜有机体的形成和特性.
- 为了证明这些人造隔间在控制分子运输和反应中的应用.
主要方法:
- 设计了一个基于ELP的区块共聚合物蛋白的库,具有定义的电荷和域属性.
- 诱导LLPS在体外和体内 (大肠杆菌) 形成蛋白质相隔空间 (PPSS).
- 研究了PPSS对物理化学触发物的反应能力以及它们与DNA和其他分子的相互作用.
主要成果:
- 开发了量身定制的类似ELP的块共聚物,表现出IDP行为并形成LLPS结构.
- 通过大肠杆菌中的蛋白相分离,证明了基于膜的和没有膜的超结构的组装.
- 展示了分子在PPSS相界和细胞膜之间选择性,取决于电荷的穿.
结论:
- 可编程的基于ELP的区块共聚合物使得可以创建具有可调节性质的人工无膜有机体.
- 这些人造隔间可以控制细胞内分裂和分子流动,模仿自然的MO.
- 开发的技术为可调节的人工存储和反应空间提供了一个平台,在药学和合成生物学中具有应用.
相关概念视频
Protein Complexes with Interchangeable Parts
2.6K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.6K
Intrinsically Disordered Proteins
17.9K
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...
17.9K
Molecular Chaperones and Protein Folding
18.1K
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
18.1K
Eukaryotic Compartmentalization
156.8K
One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
For example, lysosomes in the animal cells...
For example, lysosomes in the animal cells...
156.8K
Protein Complex Assembly
10.7K
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...
10.7K
Protein Organization
138.7K
Overview
138.7K


