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@ARTICLE{Gushchin:279612,
author = {Gushchin, Ivan and Shevchenko, Vitaly and Polovinkin,
Vitaly and Borshchevskiy, Valentin and Buslaev, Pavel and
Bamberg, Ernst and Gordeliy, Valentin},
title = {{S}tructure of the light-driven sodium pump {KR}2 and its
implications for optogenetics},
journal = {The FEBS journal},
volume = {283},
number = {7},
issn = {1742-464X},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2015-07496},
pages = {1232–1238},
year = {2016},
abstract = {A key and common process present in the organisms from all
the domains of life is the maintenance of the ion gradient
between inside and outside of the cell. The gradient is
generated by various active transporters, among which are
the light-driven ion pumps of the microbial rhodopsins
family. While the proton- and anion-pumping rhodopsins have
been known for a long time, the cation (sodium) pumps were
described only recently. Following the discovery, high
resolution atomic structures of the pump KR2 were determined
that revealed the complete ion translocation pathway,
including the positions of the characteristic Asn-Asp-Gln
(NDQ) residues, unusual ion uptake cavity acting as a
selectivity filter and the unique N-terminal α-helix,
capping the ion release cavity, as well as unexpected
flexibility of the retinal binding pocket. The structures
also revealed pentamerization of KR2 and binding of sodium
ions at the interface. Finally, based on the structures, the
potassium-pumping KR2 variants have been designed, making
the findings even more important for optogenetic
applications. In this Structural Snapshot, we analyze the
implications of the structural findings for understanding of
the sodium translocation mechanism and application of the
pump and its mutants in optogenetics. This article is
protected by copyright. All rights reserved.This article is
protected by copyright. All rights reserved.},
cin = {ICS-6},
ddc = {540},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000374010500004},
pubmed = {pmid:26535564},
doi = {10.1111/febs.13585},
url = {https://juser.fz-juelich.de/record/279612},
}