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@ARTICLE{Endres:188053,
author = {Endres, Stephan and Granzin, Joachim and Circolone, Franco
and Stadler, Andreas and Krauss, Ulrich and Drepper, Thomas
and Svensson, Vera and Knieps-Grünhagen, Esther and Wirtz,
Astrid and Cousin, Anneliese and Tielen, Petra and Willbold,
Dieter and Jaeger, Karl-Erich and Batra-Safferling, Renu},
title = {{S}tructure and function of a short {LOV} protein from the
marine phototrophic bacterium {D}inoroseobacter shibae},
journal = {BMC microbiology},
volume = {15},
number = {1},
issn = {1471-2180},
address = {London},
publisher = {BioMed Central},
reportid = {FZJ-2015-01531},
pages = {30},
year = {2015},
abstract = {BackgroundLight, oxygen, voltage (LOV) domains are widely
distributed in plants, algae, fungi, bacteria, and represent
the photo-responsive domains of various blue-light
photoreceptor proteins. Their photocycle involves the
blue-light triggered adduct formation between the C(4a) atom
of a non-covalently bound flavin chromophore and the sulfur
atom of a conserved cysteine in the LOV sensor domain. LOV
proteins show considerable variation in the structure of N-
and C-terminal elements which flank the LOV core domain, as
well as in the lifetime of the adduct state.ResultsHere, we
report the photochemical, structural and functional
characterization of DsLOV, a LOV protein from the
photoheterotrophic marine α-proteobacterium Dinoroseobacter
shibae which exhibits an average adduct state lifetime of
9.6 s at 20°C, and thus represents the fastest reverting
bacterial LOV protein reported so far. Mutational analysis
in D. shibae revealed a unique role of DsLOV in controlling
the induction of photopigment synthesis in the absence of
blue-light. The dark state crystal structure of DsLOV
determined at 1.5 Å resolution reveals a conserved core
domain with an extended N-terminal cap. The dimer interface
in the crystal structure forms a unique network of hydrogen
bonds involving residues of the N-terminus and the
β-scaffold of the core domain. The structure of
photoexcited DsLOV suggests increased flexibility in the
N-cap region and a significant shift in the Cα backbone of
β strands in the N- and C-terminal ends of the LOV core
domain.ConclusionsThe results presented here cover the
characterization of the unusual short LOV protein DsLOV from
Dinoroseobacter shibae including its regulatory function,
extremely fast dark recovery and an N-terminus mediated
dimer interface. Due to its unique photophysical, structural
and regulatory properties, DsLOV might thus serve as an
alternative model system for studying light perception by
LOV proteins and physiological responses in bacteria.},
cin = {Neutronenstreuung ; JCNS-1 / ICS-1 / IMET / ICS-6},
ddc = {570},
cid = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106 /
I:(DE-Juel1)IMET-20090612 / I:(DE-Juel1)ICS-6-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621) /
89581 - Biotechnology (POF2-89581)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF2-89581},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000350256600003},
doi = {10.1186/s12866-015-0365-0},
url = {https://juser.fz-juelich.de/record/188053},
}