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@INPROCEEDINGS{Biehl:1023000,
author = {Biehl, Ralf},
title = {{D}omain {M}otions: {P}rotein {D}ynamics seen by {N}eutron
{S}pinecho {S}pectroscopy},
reportid = {FZJ-2024-01589},
year = {2024},
abstract = {The biological function of proteins is often related to
configurational changes and large-scale domain motions,
which are induced or suppressed by the binding of a
substrate or due to cosolvents. Domain motions can be
related to soft hinges, flexible linker regions or -as in
the case of intrinsically disordered proteins- be native to
proteins without secondary or tertiary structure. These
large-scale domain motions in solution cannot be observed by
X-ray crystallography or NMR spectroscopy. Small angle
scattering (SAS) by X-rays or neutrons in combination with
neutron spin echo spectroscopy (NSE) in solution can be used
to observe configurational changes and equilibrium dynamics
between functional domains on 1-300 nanosecond timescale.I
will present examples for different types of motions related
to the structure of proteins and bioconjugates. Thermal
unfolded Ribonuclease A shows polymer like dynamics despite
the 4 disulfide bonds restricting the degrees of freedom.
Prior to full unfolding the protein unfolding dynamics is
observed. Polyelectrolytes have structural and dynamical
similarities with IDP. The domain protein Phosphoglycerate
kinase shows a hinge motion between the main domains related
to function. PEGylation seems not to influence this domain
motion but adds additional internal dynamics in the
protein-polymer complex. Antibodies present a strong
dynamics due to the short linkers connecting the Fc with the
Fab domains. The observed dynamics is related to internal
forces, solvent friction and the role of charge screening.},
organization = {Antibodies in Solution: a LINXS - NIST
Webinar Series, Online (Sweden)},
subtyp = {Invited},
cin = {JCNS-1 / IBI-8},
cid = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)IBI-8-20200312},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (FZJ) (POF4-6G4) / 5251 - Multilevel Brain
Organization and Variability (POF4-525) / 5241 - Molecular
Information Processing in Cellular Systems (POF4-524)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4 /
G:(DE-HGF)POF4-5251 / G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)31},
url = {https://juser.fz-juelich.de/record/1023000},
}