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@ARTICLE{Maia:904485,
author = {Maia, Raiza N. A. and Ehrenberg, David and Oldemeyer,
Sabine and Knieps-Grünhagen, Esther and Krauss, Ulrich and
Heberle, Joachim},
title = {{R}eal-{T}ime {T}racking of {P}roton {T}ransfer from the
{R}eactive {C}ysteine to the {F}lavin {C}hromophore of a
{P}hotosensing {L}ight {O}xygen {V}oltage {P}rotein},
journal = {Journal of the American Chemical Society},
volume = {143},
number = {32},
issn = {0002-7863},
address = {Washington, DC},
publisher = {American Chemical Society},
reportid = {FZJ-2021-06055},
pages = {12535 - 12542},
year = {2021},
abstract = {LOV (light oxygen voltage) proteins are photosensors
ubiquitous to all domains of life. A variant of the short
LOV protein from Dinoroseobacter shibae (DsLOV) exhibits an
exceptionally fast photocycle. We performed time-resolved
molecular spectroscopy on DsLOV-M49S and characterized the
formation of the thio-adduct state with a covalent bond
between the reactive cysteine (C72) and C4a of the FMN. By
use of a tunable quantum cascade laser, the weak absorption
change of the vibrational band of S–H stretching vibration
of C57 was resolved with a time resolution of 10 ns.
Deprotonation of C72 proceeded with a time constant of 12
μs which tallies the rise of the thio-adduct state. These
results provide valuable information for the mechanistic
interpretation of light-induced structural changes in LOV
domains, which involves the choreographed sequence of proton
transfers, changes in electron density distributions, spin
alterations of the latter, and transient bond formation and
breakage. Such molecular insight will help develop new
optogenetic tools based on flavin photoreceptors.},
cin = {IBG-1 / IMET},
ddc = {540},
cid = {I:(DE-Juel1)IBG-1-20101118 / I:(DE-Juel1)IMET-20090612},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34347468},
UT = {WOS:000686555000018},
doi = {10.1021/jacs.1c03409},
url = {https://juser.fz-juelich.de/record/904485},
}