Related Experiment Video
Updated: Jun 24, 2025
12:37
Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
Published on: September 4, 2015
12.3K
Charge block-driven liquid-liquid phase separation - mechanism and biological roles.
Tetsu Koyama1, Naoki Iso1, Yuki Norizoe1
1Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
Journal of Cell Science
|June 10, 2024
Summary
Liquid-liquid phase separation (LLPS) is crucial for cell biology, driven by weak interactions in intrinsically disordered regions (IDRs). New research highlights
Area of Science:
- Cell Biology
- Biophysics
- Structural Biology
Background:
- Liquid-liquid phase separation (LLPS) is a fundamental cellular process governing protein interactions.
- Intrinsically disordered regions (IDRs) in polypeptides mediate LLPS through weak, promiscuous interactions.
- Conventional theories do not fully explain LLPS mechanisms within the intracellular environment.
Purpose of the Study:
- To review recent advancements in understanding charge block-driven LLPS.
- To explore the role of 'charge blockiness' in regulating LLPS spatiotemporal dynamics.
- To discuss the implications of charge blockiness for structural and cell biology.
Main Methods:
- Review of recent scientific literature on LLPS and IDRs.
- Analysis of physicochemical models incorporating 'charge blockiness'.
- Discussion of experimental evidence linking charge blocks to LLPS regulation.
Main Results:
- Charge block interactions are key drivers of LLPS and its spatiotemporal control.
- The parameter 'charge blockiness' enhances understanding of sequence-determined LLPS.
- 'Charge blockiness' may explain post-translational modification localization within IDRs.
Conclusions:
- Charge block-driven LLPS represents a significant paradigm in cell biology.
- The 'charge blockiness' parameter offers novel insights into polypeptide behavior and LLPS.
- This parameter opens new avenues for research in structural and cell biology.
Related Concept Videos
01:11High-Performance Liquid Chromatography: Introduction
2.0K
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
In HPLC, two phases play a critical role in the separation process:
2.0K
01:20Overview Of Cell Separation And Isolation
5.6K
Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
5.6K
00:56Extraction: Advanced Methods
446
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446
01:30Capillary Electrophoresis: Applications
378
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
378
01:05High-Performance Liquid Chromatography: Elution Process
458
In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
458
01:06Coagulation
281
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
281