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@ARTICLE{Dmitrieva:1024692,
author = {Dmitrieva, Nataliia 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 = {bioRxiv beta},
address = {Cold Spring Harbor},
publisher = {Cold Spring Harbor Laboratory, NY},
reportid = {FZJ-2024-02365},
year = {2024},
note = {Preprint publicly available},
abstract = {The solute carrier 17 (SLC17) family contains anion
transporters that accumulate neurotransmitters in secretory
vesicles, remove carboxylated monosaccharides from
lysosomes, or extrude organic anions from the kidneys and
the liver. We combined experimental and computational
approaches to describe the transport mechanisms of a model
bacterial protein, the D-galactonate transporter DgoT, at
atomic resolution. We found that protonation of D46 and E133
precedes galacto-nate binding and that substrate binding
induces closure of the extracellular gate, with the
conserved R47 coupling substrate binding to transmembrane
helix movement. After isomerization to an inward-facing
conformation, deprotonation of E133 and subsequent proton
transfer from D46 to E133 opens the intracellular gate and
permits galactonate dissociation. After release of the
second proton, apo DgoT returns to the outward-facing
conformation. Our results provide a framework to understand
how various SLC17 transport functions with distinct
transport stoichiometries can be attained through subtle
variations in proton and substrate binding/unbinding.},
cin = {IBI-1 / IAS-5 / INM-9},
ddc = {570},
cid = {I:(DE-Juel1)IBI-1-20200312 / I:(DE-Juel1)IAS-5-20120330 /
I:(DE-Juel1)INM-9-20140121},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524) / 5252 - Brain Dysfunction and Plasticity
(POF4-525) / DFG project 291198853 - FOR 2518: Funktionale
Dynamik von Ionenkanälen und Transportern - DynIon -
(291198853) / DFG project 329460521 - Protonentransfer und
Substraterkennung in SLC17-Transportern (329460521)},
pid = {G:(DE-HGF)POF4-5241 / G:(DE-HGF)POF4-5252 /
G:(GEPRIS)291198853 / G:(GEPRIS)329460521},
typ = {PUB:(DE-HGF)25},
doi = {10.1101/2024.02.07.579339},
url = {https://juser.fz-juelich.de/record/1024692},
}