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@ARTICLE{Foglia:827561,
author = {Foglia, Fabrizia and Hazael, Rachael and Simeoni, Giovanna
G. and Appavou, Marie-Sousai and Moulin, Martine and
Haertlein, Michael and Trevor Forsyth, V. and Seydel, Tilo
and Daniel, Isabelle and Meersman, Filip and McMillan, Paul
F.},
title = {{W}ater {D}ynamics in {S}hewanella oneidensis at {A}mbient
and {H}igh {P}ressure using {Q}uasi-{E}lastic {N}eutron
{S}cattering},
journal = {Scientific reports},
volume = {6},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2017-01681},
pages = {18862 -},
year = {2016},
abstract = {Quasielastic neutron scattering (QENS) is an ideal
technique for studying water transport and relaxation
dynamics at pico- to nanosecond timescales and at length
scales relevant to cellular dimensions. Studies of high
pressure dynamic effects in live organisms are needed to
understand Earth’s deep biosphere and biotechnology
applications. Here we applied QENS to study water transport
in Shewanella oneidensis at ambient (0.1 MPa) and high (200
MPa) pressure using H/D isotopic contrast experiments for
normal and perdeuterated bacteria and buffer solutions to
distinguish intracellular and transmembrane processes. The
results indicate that intracellular water dynamics are
comparable with bulk diffusion rates in aqueous fluids at
ambient conditions but a significant reduction occurs in
high pressure mobility. We interpret this as due to enhanced
interactions with macromolecules in the nanoconfined
environment. Overall diffusion rates across the cell
envelope also occur at similar rates but unexpected
narrowing of the QENS signal appears between momentum
transfer values Q = 0.7–1.1 Å−1 corresponding to
real space dimensions of 6–9 Å. The relaxation time
increase can be explained by correlated dynamics of
molecules passing through Aquaporin water transport
complexes located within the inner or outer membrane
structures.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {000},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15) / NMI3-II - Neutron
Scattering and Muon Spectroscopy Integrated Initiative
(283883)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15 /
G:(EU-Grant)283883},
experiment = {EXP:(DE-MLZ)TOF-TOF-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000368191200001},
pubmed = {pmid:26738409},
doi = {10.1038/srep18862},
url = {https://juser.fz-juelich.de/record/827561},
}