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@ARTICLE{Grieschat:875317,
author = {Grieschat, Matthias and Guzman, Raul E and Langschwager,
Katharina and Fahlke, Christoph and Alekov, Alexi K},
title = {{M}etabolic energy sensing by mammalian {CLC} anion/proton
exchangers},
journal = {EMBO reports},
volume = {21},
number = {6},
issn = {1469-3178},
address = {Hoboken, NJ [u.a.]},
publisher = {Wiley},
reportid = {FZJ-2020-01948},
pages = {e47872},
year = {2020},
abstract = {CLC anion/proton exchangers control the pH and [Cl−] of
the endolysosomal system that is essential for cellular
nutrient uptake. Here, we use heterologous expression and
whole‐cell electrophysiology to investigate the regulation
of the CLC isoforms ClC‐3, ClC‐4, and ClC‐5 by the
adenylic system components ATP , ADP , and AMP . Our results
show that cytosolic ATP and ADP but not AMP and Mg2+‐free
ADP enhance CLC ion transport. Biophysical analysis reveals
that adenine nucleotides alter the ratio between CLC ion
transport and CLC gating charge and shift the CLC
voltage‐dependent activation. The latter effect is
suppressed by blocking the intracellular entrance of the
proton transport pathway. We suggest, therefore, that
adenine nucleotides regulate the internal proton delivery
into the CLC transporter machinery and alter the probability
of CLC transporters to undergo silent non‐transporting
cycles. Our findings suggest that the CBS domains in
mammalian CLC transporters serve as energy sensors that
regulate vesicular Cl−/H+ exchange by detecting changes in
the cytosolic ATP /ADP /AMP equilibrium. Such sensing
mechanism links the endolysosomal activity to the cellular
metabolic state.},
cin = {IBI-1},
ddc = {570},
cid = {I:(DE-Juel1)IBI-1-20200312},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32390228},
UT = {WOS:000531272100001},
doi = {10.15252/embr.201947872},
url = {https://juser.fz-juelich.de/record/875317},
}