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@ARTICLE{Chiariello:892901,
author = {Chiariello, Maria Gabriella and Alfonso-Prieto, Mercedes
and Ippoliti, Emiliano and Fahlke, Christoph and Carloni,
Paolo},
title = {{M}echanisms {U}nderlying {P}roton {R}elease in {CLC}-type
{F} – /{H} + {A}ntiporters},
journal = {The journal of physical chemistry letters},
volume = {12},
number = {18},
issn = {1948-7185},
address = {Washington, DC},
publisher = {ACS},
reportid = {FZJ-2021-02425},
pages = {4415 - 4420},
year = {2021},
note = {Funded by Deutsche Forschungsgemeinschaft via the Research
Unit FOR2518 “Functional Dynamics of Ion Channels and
Transporters − DynIon”, project P6.},
abstract = {The CLC family of anion channels and transporters includes
Cl–/H+ exchangers (blocked by F–) and F–/H+ exchangers
(or CLCFs). CLCFs contain a glutamate (E318) in the central
anion-binding site that is absent in CLC Cl–/H+
exchangers. The X-ray structure of the protein from
Enterococcus casseliflavus (CLCF-eca) shows that E318
tightly binds to F– when the gating glutamate (E118;
highly conserved in the CLC family) faces the extracellular
medium. Here, we use classical and DFT-based QM/MM
metadynamics simulations to investigate proton transfer and
release by CLCF-eca. After up to down movement of protonated
E118, both glutamates combine with F– to form a triad,
from which protons and F– anions are released as HF. Our
results illustrate how glutamate insertion into the central
anion-binding site of CLCF-eca permits the release of H+ to
the cytosol as HF, thus enabling a net 1:1 F–/H+
stoichiometry.},
cin = {IAS-5 / INM-9 / IBI-1 / INM-11 / JARA-HPC},
ddc = {530},
cid = {I:(DE-Juel1)IAS-5-20120330 / I:(DE-Juel1)INM-9-20140121 /
I:(DE-Juel1)IBI-1-20200312 / I:(DE-Juel1)INM-11-20170113 /
$I:(DE-82)080012_20140620$},
pnm = {524 - Molecular and Cellular Information Processing
(POF4-524) / DFG project 291198853 - FOR 2518: Funktionale
Dynamik von Ionenkanälen und Transportern - DynIon -},
pid = {G:(DE-HGF)POF4-524 / G:(GEPRIS)291198853},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33950673},
UT = {WOS:000651787900012},
doi = {10.1021/acs.jpclett.1c00361},
url = {https://juser.fz-juelich.de/record/892901},
}