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@ARTICLE{Eicher:843904,
author = {Eicher, Barbara and Marquardt, Drew and Heberle, Frederick
A. and Letofsky-Papst, Ilse and Rechberger, Gerald N. and
Appavou, Marie-Sousai and Katsaras, John and Pabst, Georg},
title = {{I}ntrinsic {C}urvature-{M}ediated {T}ransbilayer
{C}oupling in {A}symmetric {L}ipid {V}esicles},
journal = {Biophysical journal},
volume = {114},
number = {1},
issn = {0006-3495},
address = {Cambridge, Mass.},
publisher = {Cell Press},
reportid = {FZJ-2018-01431},
pages = {146 - 157},
year = {2018},
abstract = {We measured the effect of intrinsic lipid curvature, , on
structural properties of asymmetric vesicles made of
palmitoyl-oleoyl-phosphatidylethanolamine (POPE; ) and
palmitoyl-oleoyl-phosphatidylcholine (POPC; ). Electron
microscopy and dynamic light scattering were used to
determine vesicle size and morphology, and x-ray and neutron
scattering, combined with calorimetric experiments and
solution NMR, yielded insights into leaflet-specific lipid
packing and melting processes. Below the lipid melting
temperature we observed strong interleaflet coupling in
asymmetric vesicles with POPE inner bilayer leaflets and
outer leaflets enriched in POPC. This lipid arrangement
manifested itself by lipids melting cooperatively in both
leaflets, and a rearrangement of lipid packing in both
monolayers. On the other hand, no coupling was observed in
vesicles with POPC inner bilayer leaflets and outer leaflets
enriched in POPE. In this case, the leaflets melted
independently and did not affect each other’s acyl chain
packing. Furthermore, we found no evidence for transbilayer
structural coupling above the melting temperature of either
sample preparation. Our results are consistent with the
energetically preferred location of POPE residing in the
inner leaflet, where it also resides in natural membranes,
most likely causing the coupling of both leaflets. The loss
of this coupling in the fluid bilayers is most likely the
result of entropic contributions.},
cin = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {570},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29320681},
UT = {WOS:000419595500016},
doi = {10.1016/j.bpj.2017.11.009},
url = {https://juser.fz-juelich.de/record/843904},
}