核进口接收器通过结合到多个位置来抑制FUS的相分离
Takuya Yoshizawa1, Rustam Ali2, Jenny Jiou1
1Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Cell
|April 21, 2018
概括
通过与其PY-NLS结合,抑制FUS蛋白的液态分离 (LLPS). 这种相互作用破坏了FUS的自我组装,为凝结物形成和调节提供了洞察力.
科学领域:
- 生物化学
- 细胞生物学
- 分子生物物理学
背景情况:
- 液相分离 (LLPS) 推动了无膜生物分子凝聚物的形成.
- 控制LLPS和冷凝液动态的机制仍然不完全理解.
- 已知RNA结合蛋白FUS经历LLPS并局部化为细胞凝聚物.
研究的目的:
- 调查蛋白-β2在FUSLLPS调节中的作用.
- 阐明卡里奥菲林-β2抑制FUSLLPS的分子机制.
- 探索卡里奥菲林-β2作为凝聚物形成调节剂的潜力.
主要方法:
- 在体外LLPS测定.
- 生物化学相互作用研究.
- 核磁共振 (NMR) 光谱学
主要成果:
- 发现卡里奥菲林-β2可以抑制FUSLLPS.
- 抑制与高 afinity 的 karyopherin-β2 与 FUS PY-NLS 的结合相关.
- 核磁共振和生物化学分析显示,在LLPS中所涉及的卡里奥菲林-β2和FUS区域之间存在微弱的分布相互作用.
结论:
- 提出了一个模型,在这个模型中,与FUS PY-NLS的karyopherin-β2结合起到了支架作用,使弱相互作用能够破坏FUS的自我结合并阻断LLPS.
- 卡里奥菲林-β2的抑制机制为控制各种细胞环境中的凝结物形成提供了潜在的策略.
更多相关视频
10:03Isolation of CA1 Nuclear Enriched Fractions from Hippocampal Slices to Study Activity-dependent Nuclear Import of Synapto-nuclear Messenger Proteins
Published on: August 10, 2014
12.5K
12:24PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
Published on: July 2, 2010
54.2K
相关概念视频
Conserved Binding Sites
5.2K
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...
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...
5.2K
Conserved Binding Sites
2.0K
2.0K
Ligand Binding Sites
15.2K
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
15.2K
Ligand Binding Sites
8.9K
8.9K
Nuclear Binding Energy
14.8K
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons are bound...
14.8K
Nuclear Localization Signals and Import
7.8K
Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of 2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
7.8K
