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@ARTICLE{Wschenbach:868376,
author = {Wäschenbach, Lucas and Gertzen, Christoph G. W. and
Keitel, Verena and Gohlke, Holger},
title = {{D}imerization energetics of the {G}‐protein coupled bile
acid receptor {TGR}5 from all‐atom simulations},
journal = {Journal of computational chemistry},
volume = {41},
number = {9},
issn = {1096-987X},
address = {New York, NY [u.a.]},
publisher = {Wiley},
reportid = {FZJ-2019-06905},
pages = {874-884},
year = {2020},
abstract = {We describe the first extensive energetic evaluation of
GPCR dimerization on the atomistic level by means of
potential of mean force (PMF) computations and implicit
solvent/implicit membrane end‐point free energy
calculations (MM‐PBSA approach). Free energies of
association computed from the PMFs show that the formation
of both the 1/8 and 4/5 interface is energetically favorable
for TGR5, the first GPCR known to be activated by
hydrophobic bile acids and neurosteroids. Furthermore,
formation of the 1/8 interface is favored over that of the
4/5 interface. Both results are in line with our previous
FRET experiments in live cells. Differences in
lipid‐protein interactions are identified to contribute to
the observed differences in free energies of association. A
per‐residue decomposition of the MM‐PBSA effective
binding energy reveals hot spot residues specific for both
interfaces that form clusters. This knowledge may be used to
guide the design of dimerization inhibitors or perform
mutational studies to explore physiological consequences of
distorted TGR5 association. Finally, we characterized the
role of Y111, located in the conserved (D/E)RY motif, as a
facilitator of TGR5 interactions. The types of computations
performed here should be transferable to other transmembrane
proteins that form dimers or higher oligomers as long as
good structural models of the dimeric or oligomeric states
are available. Such computations may help to overcome
current restrictions due to an imperfect energetic
representation of protein association at the
coarse‐grained level.},
cin = {NIC / JSC / ICS-6},
ddc = {540},
cid = {I:(DE-Juel1)NIC-20090406 / I:(DE-Juel1)JSC-20090406 /
I:(DE-Juel1)ICS-6-20110106},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511) / Forschergruppe Gohlke $(hkf7_20170501)$ /
Antagonists of the TGR5 G-protein complex formation
$(hdd15_20170501)$ / Energetics of the dimerization and
G-protein coupling of the bile-acid sensing GPCR TGR5
$(hdd15_20160501)$ / DFG project 190586431 - SFB 974:
Kommunikation und Systemrelevanz bei Leberschädigung und
Regeneration},
pid = {G:(DE-HGF)POF3-511 / $G:(DE-Juel1)hkf7_20170501$ /
$G:(DE-Juel1)hdd15_20170501$ / $G:(DE-Juel1)hdd15_20160501$
/ G:(GEPRIS)190586431},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31880348},
UT = {WOS:000504508300001},
doi = {10.1002/jcc.26135},
url = {https://juser.fz-juelich.de/record/868376},
}