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@ARTICLE{Dmitrieva:1040302,
author = {Dmitrieva, Natalia and Gholami, Samira and Alleva, Claudia
and Carloni, Paolo and Alfonso-Prieto, Mercedes and Fahlke,
Christoph},
title = {{T}ransport mechanism of {D}go{T}, a bacterial homolog of
{SLC}17 organic anion transporters},
journal = {The EMBO journal},
volume = {43},
number = {24},
issn = {0261-4189},
address = {[London]},
publisher = {Nature Publishing Group UK},
reportid = {FZJ-2025-01830},
pages = {6740 - 6765},
year = {2024},
abstract = {The solute carrier 17 (SLC17) family contains anion
transportersthat accumulate neurotransmitters in secretory
vesicles, removecarboxylated monosaccharides from lysosomes,
or extrude organicanions from the kidneys and liver.We
combined classical moleculardynamics simulations, Markov
state modeling and hybrid firstprinciples quantum
mechanical/classical mechanical (QM/MM)simulations with
experimental approaches to describe the transportmechanisms
of a model bacterial protein, the D-galactonatetransporter
DgoT, at atomic resolution. We found that protonationof D46
and E133 precedes galactonate binding and that
substratebinding induces closure of the extracellular gate,
with the conservedR47 coupling substrate binding to
transmembrane helixmovement. After isomerization to an
inward-facing conformation,deprotonation of E133 and
subsequent proton transfer from D46 toE133 opens the
intracellular gate and permits galactonate
dissociationeither in its unprotonated form or after proton
transferfrom E133. After release of the second proton, apo
DgoT returns tothe outward-facing conformation. Our results
provide a frameworkto understand how various SLC17 transport
functions with distincttransport stoichiometries can be
attained through subtle variationsin proton and substrate
binding/unbinding.},
cin = {IBI-1 / INM-9},
ddc = {570},
cid = {I:(DE-Juel1)IBI-1-20200312 / I:(DE-Juel1)INM-9-20140121},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
doi = {10.1038/s44318-024-00279-y},
url = {https://juser.fz-juelich.de/record/1040302},
}