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@ARTICLE{Hansen:904359,
author = {Hansen, Jan and Uthayakumar, Rajeevann and Pedersen, Jan
Skov and Egelhaaf, Stefan U. and Platten, Florian},
title = {{I}nteractions in protein solutions close to
liquid–liquid phase separation: ethanol reduces
attractions via changes of the dielectric solution
properties},
journal = {Physical chemistry, chemical physics},
volume = {23},
number = {39},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2021-05929},
pages = {22384 - 22394},
year = {2021},
abstract = {Ethanol is a common protein crystallization agent,
precipitant, and denaturant, but also alters the dielectric
properties of solutions. While ethanol-induced unfolding is
largely ascribed to its hydrophobic parts, its effect on
protein phase separation and inter-protein interactions
remains poorly understood. Here, the effects of ethanol and
NaCl on the phase behavior and interactions of protein
solutions are studied in terms of the metastable
liquid–liquid phase separation (LLPS) and the second
virial coefficient B2 using lysozyme solutions.
Determination of the phase diagrams shows that the
cloud-point temperatures are reduced and raised by the
addition of ethanol and salt, respectively. The observed
trends can be explained using the extended law of
corresponding states as changes of B2. The results for B2
agree quantitatively with those of static light scattering
and small-angle X-ray scattering experiments. Furthermore,
B2 values calculated based on inter-protein interactions
described by the Derjaguin-Landau-Verwey-Overbeek (DLVO)
potential and considering the dielectric solution properties
and electrostatic screening due to the ethanol and salt
content quantitatively agree with the experimentally
observed B2 values.},
cin = {IBI-4},
ddc = {540},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34608908},
UT = {WOS:000703642400001},
doi = {10.1039/D1CP03210K},
url = {https://juser.fz-juelich.de/record/904359},
}