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@INPROCEEDINGS{Pant:874410,
author = {Pant, Pradeep and Ruiz-Blanco, Yasser B. and
Sanchez-Garcia, Elsa},
title = {{S}olvent {E}ffects on the {B}inding of {F}atty {A}cids to
{H}uman {S}erum {A}lbumin},
volume = {50},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2020-01420},
series = {Publication Series of the John von Neumann Institute for
Computing (NIC) NIC Series},
pages = {147 - 156},
year = {2020},
comment = {NIC Symposium 2020},
booktitle = {NIC Symposium 2020},
abstract = {Solvent interactions can influence the properties and
function of complex biomolecules. Among others, altering the
solvent composition has consequences for the recognition of
binding partners. Human serum albumin (HSA) is one of the
most enigmatic biomolecules, known as an efficient carrier
of biological materials, such as hormones, fatty acids and
drugs. Here we explored the effects of the solvent on
stearic acid-HSA binding. To this end, we performed all-atom
molecular dynamics (MD) simulations in explicit solvent (~
2.9 μs in total). These MD simulations were carried out in
explicit water and in a $20\%$ ethanol-water mixture. The
sampling in both systems was processed with the MM-PBSA
binding free energy approach, which allowed us to
investigate the effects of the solvent composition on the
binding of stearic acid molecules to seven binding sites of
HSA. Using this computational approach, we were able to
reproduce the experimental preference of fatty acid’s
binding sites for albumin in water. Site 5 > site 4 > site 2
were calculated as high affinity fatty acid binding sites,
in agreement with the experimental reports.[1]
Interestingly, we observed that site 1 becomes the most
prominent binding pocket in the $20\%$ ethanol-water
mixture, with overall binding affinity towards stearic acid:
site 1 > site 5 > site 2. Our simulations in explicit
solvent also provided a rationale for this effect.
Importantly, we achieved weak binding-to strong binding
conversion by using a solvent mixture, with repercussions
for the specific binding properties and the manipulation of
HSA properties as biological carrier.},
month = {Feb},
date = {2020-02-27},
organization = {NIC Symposium 2020, Jülich (Germany),
27 Feb 2020 - 28 Feb 2020},
cin = {NIC},
cid = {I:(DE-Juel1)NIC-20090406},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
url = {https://juser.fz-juelich.de/record/874410},
}