Interplay between Kinetics and Dynamics of Liquid-Liquid Phase Separation in a Protein Solution Revealed by Coherent X-ray Spectroscopy.
Anastasia Ragulskaya,Nafisa Begam,Anita Girelli,Hendrik Rahmann,Mario Reiser,Fabian Westermeier,Michael Sprung,Fajun Zhang,Christian Gutt,Frank Schreiber +9 more
TLDR
In this paper, the authors used X-ray photon correlation spectroscopy to study the dynamics and kinetics of a protein solution undergoing liquid-liquid phase separation (LLPS) and demonstrated that in the early stage of spinodal decomposition, the kinetics relaxation is up to 40 times slower than the dynamics.Abstract:
Microscopic dynamics of complex fluids in the early stage of spinodal decomposition (SD) is strongly intertwined with the kinetics of structural evolution, which makes a quantitative characterization challenging. In this work, we use X-ray photon correlation spectroscopy to study the dynamics and kinetics of a protein solution undergoing liquid-liquid phase separation (LLPS). We demonstrate that in the early stage of SD, the kinetics relaxation is up to 40 times slower than the dynamics and thus can be decoupled. The microscopic dynamics can be well described by hyper-diffusive ballistic motions with a relaxation time exponentially growing with time in the early stage followed by a power-law increase with fluctuations. These experimental results are further supported by simulations based on the Cahn-Hilliard equation. The established framework is applicable to other condensed matter and biological systems undergoing phase transitions and may also inspire further theoretical work.read more
Citations
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Resolving molecular diffusion and aggregation of antibody proteins with megahertz X-ray free-electron laser pulses
Mario Reiser,Anita Girelli,Anastasia Ragulskaya,Sudipta Das,Sharon Berkowicz,Maddalena Bin,Marjorie Ladd-Parada,M. Filianina,Hanna-Friederike Poggemann,Nafisa Begam,Mohammad Sayed Sayed Akhundzadeh,Sonja Timmermann,Lisa Randolph,Yuriy Chushkin,Tilo Seydel,Ulrike Boesenberg,Jörg Hallmann,Johannes Möller,Angel Rodriguez-Fernandez,R. Rosca,Robert Schaffer,Markus Scholz,Roman Shayduk,Alexey Zozulya,Anders Madsen,Frank Schreiber,Fajun Zhang,Fivos Perakis,Christian Gutt +28 more
TL;DR: In this paper , the dynamics of dense antibody protein (Ig-PEG) solutions using megahertz X-ray photon correlation spectroscopy (MHz-XPCS) at the European XFEL were investigated.
Journal ArticleDOI
Automated matching of two-time X-ray photon correlation maps from phase-separating proteins with Cahn–Hilliard-type simulations using auto-encoder networks
TL;DR: In this article , machine learning methods are used for an automated classification of experimental two-time X-ray photon correlation maps from an arrested liquid-liquid phase separation of a protein solution.
Journal ArticleDOI
Reverse-engineering method for XPCS studies of non-equilibrium dynamics
TL;DR: In this paper , a reverse-engineering approach based on particle-based heuristic simulations is applied to an X-ray photon correlation spectroscopy measurement on a protein solution undergoing a liquid-liquid phase separation.
Journal ArticleDOI
Coherent X-ray Scattering Reveals Nanoscale Fluctuations in Hydrated Proteins
Maddalena Bin,Mario Reiser,M. Filianina,Sharon Berkowicz,Sudipta Das,Sonja Timmermann,Wojciech Roseker,Robert Bauer,Jonatan Öström,Aigerim Karina,Katrin Amann-Winkel,Marjorie Ladd-Parada,Fabian Westermeier,Michael Sprung,Johannes Möller,Felix Lehmkühler,Christian Gutt,Fivos Perakis +17 more
TL;DR: In this paper , the authors investigated the nanoscale stress-relaxation in hydrated lysozyme proteins stimulated and probed by X-ray Photon Correlation Spectroscopy (XPCS) and found that the relaxation time constants exhibit Arrhenius temperature dependence upon cooling with a minimum in the Kohlrausch-Williams-Watts exponent at 227 K.
Journal ArticleDOI
Effects of temperature and ionic strength on the microscopic structure and dynamics of egg white gels.
Nafisa Begam,Sonja Timmermann,Anastasia Ragulskaya,Anita Girelli,Maximilian Darius Senft,Sebastian Retzbach,Nimmi Das Anthuparambil,Mohammad Sayed Sayed Akhundzadeh,Marvin Kowalski,Mario Reiser,Fabian Westermeier,Michael Sprung,Fajun Zhang,Christian Gutt,Frank Schreiber +14 more
TL;DR: In this article , the authors investigated the thermal gelation of egg white proteins at different temperatures with varying salt concentrations using x-ray photon correlation spectroscopy in the geometry of ultra-small angle xray scattering, and the resulting gel network shows a fractal dimension δ, ranging from 1.5 to 2.2.
References
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Journal ArticleDOI
Free Energy of a Nonuniform System. I. Interfacial Free Energy
John W. Cahn,John E. Hilliard +1 more
TL;DR: In this article, it was shown that the thickness of the interface increases with increasing temperature and becomes infinite at the critical temperature Tc, and that at a temperature T just below Tc the interfacial free energy σ is proportional to (T c −T) 3 2.
Journal ArticleDOI
Liquid phase condensation in cell physiology and disease.
TL;DR: The findings together suggest that several membrane-less organelles have been shown to exhibit a concentration threshold for assembly, a hallmark of phase separation, and represent liquid-phase condensates, which form via a biologically regulated (liquid-liquid) phase separation process.
Journal ArticleDOI
Free Energy of a Nonuniform System. III. Nucleation in a Two‐Component Incompressible Fluid
John W. Cahn,John E. Hilliard +1 more
TL;DR: In this article, the saddle point in the expression derived in Paper I (see reference 8) for the free energy of a nonuniform system was used to derive the properties of a critical nucleus in a two-component metastable fluid.
Journal ArticleDOI
Protein Phase Separation: A New Phase in Cell Biology.
Steven Boeynaems,Steven Boeynaems,Simon Alberti,Nicolas L. Fawzi,Tanja Mittag,Magdalini Polymenidou,Frederic Rousseau,Frederic Rousseau,Joost Schymkowitz,Joost Schymkowitz,James Shorter,Benjamin Wolozin,Ludo Van Den Bosch,Peter Tompa,Peter Tompa,Monika Fuxreiter +15 more
TL;DR: A combination of techniques from cell biology, biophysics, physical chemistry, structural biology, and bioinformatics are starting to help establish the molecular principles of an emerging field, thus paving the way for exciting discoveries, including novel therapeutic approaches for the treatment of age-related disorders.
Journal ArticleDOI
Brownian motion in spinodal decomposition
TL;DR: In this paper, the influence of Brownian motion on the rate of change of the diffuse intensity is characterized by a thermal driving force proportional to k B T where k B is Boltzmann's constant and T is the temperature.
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