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@INPROCEEDINGS{Niether:888784,
author = {Niether, Doreen and Sarter, Mona and König, Bernd and
Fitter, Jörg and Stadler, Andreas and Wiegand, Simone},
title = {{T}hermophoresis: {T}he {C}ase of {S}treptavidin and
{B}iotin},
reportid = {FZJ-2020-05213},
year = {2020},
abstract = {Thermophoretic behavior of a free protein changes upon
ligand binding and gives access to information on the
binding constants. The Soret effect has also been proven to
be a promising tool to gain information on the hydration
layer, as the temperature dependence of the thermodiffusion
behavior is sensitive to solute-solvent interactions [1]. In
this work, we perform systematic thermophoretic measurements
of the protein streptavidin (STV) and of the complex STV
with biotin (B) using thermal diffusion forced Rayleigh
scattering (TDFRS) [2]. Our experiments show that the
temperature sensitivity of the Soret coefficient is reduced
for the complex compared to the free protein. We discuss our
data in comparison with recent quasi-elastic neutron
scattering (QENS) measurements. As the QENS measurement has
been performed in heavy water, we perform additional
measurements in water/heavy water mixtures. Finally, we also
elucidate the challenges arising from the quantiative
thermophoretic study of complex multicomponent systems such
as protein solutions. References[1] “Thermophoresis of
biological and biocompatible compounds in aqueous
solution”; Niether, D; Wiegand, S.; J. Phys. Condens.
Matter, 31, 503003, (2019). DOI: 10.1088/1361-648X/ab421c[2]
“Thermophoresis: The Case of Streptavidin and Biotin”;
Niether, D; Sarter, M; Koenig, B.W. et al; Polymers, 12,
376, (2020). DOI: 10.3390/polym12020376.},
month = {Nov},
date = {2020-11-19},
organization = {2020 EUSMI User Meeting, virtual
conference (Germany), 19 Nov 2020 - 19
Nov 2020},
subtyp = {Invited},
cin = {IBI-4 / IEK-8},
cid = {I:(DE-Juel1)IBI-4-20200312 / I:(DE-Juel1)IEK-8-20101013},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/888784},
}