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- W2893743826 abstract "An increasing number of proteins with intrinsically disordered domains have been shown to phase separate in buffer to form liquid-like phases. These protein condensates serve as simple models for the investigation of the more complex membrane-less organelles in cells. To understand the function of such proteins in cells, the material properties of the condensates they form are important. However, these material properties are not well understood. Here, we develop a novel method based on optical traps to study the frequency-dependent rheology and the surface tension of PGL-3 condensates as a function of salt concentration. We find that PGL-3 droplets are predominantly viscous but also exhibit elastic properties. As the salt concentration is reduced, their elastic modulus, viscosity and surface tension increase. Our findings show that salt concentration has a strong influence on the rheology and dynamics of protein condensates suggesting an important role of electrostatic interactions for their material properties." @default.
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- W2893743826 date "2018-12-18" @default.
- W2893743826 modified "2023-10-18" @default.
- W2893743826 title "Salt-Dependent Rheology and Surface Tension of Protein Condensates Using Optical Traps" @default.
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- W2893743826 doi "https://doi.org/10.1103/physrevlett.121.258101" @default.
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