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@ARTICLE{Stingaciu:807644,
author = {Stingaciu, Laura and Ivanova, Oxana and Ohl, Michael and
Biehl, Ralf and Richter, Dieter},
title = {{F}ast antibody fragment motion: flexible linkers act as
entropic spring},
journal = {Scientific reports},
volume = {6},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2016-02131},
pages = {22148 - 1-13},
year = {2016},
abstract = {A flexible linker region between three fragments allows
antibodies to adjust their binding sites to an antigen or
receptor. Using Neutron Spin Echo Spectroscopy we observed
fragment motion on a timescale of 7 ns with motional
amplitudes of about 1 nm relative to each other. The
mechanistic complexity of the linker region can be described
by a spring model with Brownian motion of the fragments in a
harmonic potential. Displacements, timescale, friction and
force constant of the underlying dynamics are accessed. The
force constant exhibits a similar strength to an entropic
spring, with friction of the fragment matching the unbound
state. The observed fast motions are fluctuations in
pre-existing equilibrium configurations. The Brownian motion
of domains in a harmonic potential is the appropriate model
to examine functional hinge motions dependent on the
structural topology and highlights the role of internal
forces and friction to function.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / ICS-1 / Neutronenstreuung ;
JCNS-1 / JCNS-SNS},
ddc = {000},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-SNS-20110128},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)J-NSE-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000372914800001},
pubmed = {pmid:27020739},
doi = {10.1038/srep22148},
url = {https://juser.fz-juelich.de/record/807644},
}