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@ARTICLE{Kovalev:875138,
author = {Kovalev, Kirill and Volkov, D. and Astashkin, R. and
Alekseev, Alexey and Gushchin, I. and Haro-Moreno, J. M. and
Chizhov, I. and Siletsky, S. and Mamedov, M. and Rogachev,
A. and Balandin, T. and Borshchevskiy, Valentin and Popov,
A. and Bourenkov, G. and Bamberg, E. and Rodriguez-Valera,
F. and Büldt, G. and Gordeliy, V.},
title = {{H}igh-resolution structural insights into the
heliorhodopsin family},
journal = {Proceedings of the National Academy of Sciences of the
United States of America},
volume = {117},
number = {8},
issn = {1091-6490},
address = {Washington, DC},
publisher = {National Acad. of Sciences},
reportid = {FZJ-2020-01830},
pages = {4131 - 4141},
year = {2020},
abstract = {Rhodopsins are the most abundant light-harvesting proteins.
A new family of rhodopsins, heliorhodopsins (HeRs), has
recently been discovered. Unlike in the known rhodopsins, in
HeRs the N termini face the cytoplasm. The function of HeRs
remains unknown. We present the structures of the bacterial
HeR-48C12 in two states at the resolution of 1.5 Å, which
highlight its remarkable difference from all known
rhodopsins. The interior of HeR’s extracellular part is
completely hydrophobic, while the cytoplasmic part comprises
a cavity (Schiff base cavity [SBC]) surrounded by charged
amino acids and containing a cluster of water molecules,
presumably being a primary proton acceptor from the Schiff
base. At acidic pH, a planar triangular molecule (acetate)
is present in the SBC. Structure-based bioinformatic
analysis identified 10 subfamilies of HeRs, suggesting their
diverse biological functions. The structures and available
data suggest an enzymatic activity of HeR-48C12 subfamily
and their possible involvement in fundamental redox
biological processes.},
cin = {IBI-7},
ddc = {500},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32034096},
UT = {WOS:000516771500038},
doi = {10.1073/pnas.1915888117},
url = {https://juser.fz-juelich.de/record/875138},
}