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@ARTICLE{Bondar:909981,
author = {Bondar, Ana-Nicoleta and Alfonso-Prieto, Mercedes},
title = {{H}ydrogen-bond networks for proton couplings in
{G}-{P}rotein coupled receptors},
journal = {Frontiers in physics},
volume = {10},
issn = {2296-424X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2022-03570},
pages = {963716},
year = {2022},
abstract = {G-protein signaling pathways mediate communication across
cell membranes. The first steps of this communication occur
at the cell membrane, where upon receiving an external
signal –the binding of an agonist ligand– the
membrane-embedded G-Protein Coupled Receptor adopts a
conformation recognized by a cytoplasmatic G protein.
Whereas specialized GPCRs sense protons from the
extracellular milieu, thus acting as pH sensors in
specialized cells, accumulating evidence suggests that pH
sensitivity might be common to distinct GPCRs. In this
perspective article we discuss general principles of
protonation-coupled protein conformational dynamics and how
these apply to GPCRs. To dissect molecular interactions that
might govern the protonation-coupled conformational dynamics
of GPCRs, we use graph-based algorithms to compute graphs of
hydrogen bond networks. We find that the internal H-bond
networks contain sites where structural rearrangements upon
protonation change could be transmitted throughout the
protein. Proton binding to bulk-exposed clusters of
titratable protein sidechains ensures the pH sensing
mechanism is robust.},
cin = {IAS-5 / INM-9},
ddc = {530},
cid = {I:(DE-Juel1)IAS-5-20120330 / I:(DE-Juel1)INM-9-20140121},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524) / DFG project 291198853 - FOR 2518: Funktionale
Dynamik von Ionenkanälen und Transportern - DynIon -},
pid = {G:(DE-HGF)POF4-5241 / G:(GEPRIS)291198853},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000856060100001},
doi = {10.3389/fphy.2022.963716},
url = {https://juser.fz-juelich.de/record/909981},
}