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@ARTICLE{Ameseder:844243,
author = {Ameseder, Felix and Radulescu, Aurel and Khaneft, Marina
and Lohstroh, Wiebke and Stadler, Andreas M.},
title = {{H}omogeneous and heterogeneous dynamics in native and
denatured bovine serum albumin},
journal = {Physical chemistry, chemical physics},
volume = {20},
number = {7},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2018-01684},
pages = {5128 - 5139},
year = {2018},
abstract = {A characteristic property of unfolded and disordered
proteins is their high molecular flexibility, which enables
the exploration of a large conformational space. We present
neutron scattering experiments on the dynamics of denatured
and native folded bovine serum albumin (BSA) in solution.
Global protein diffusion and internal macromolecular
dynamics were measured using quasielastic neutron
time-of-flight and backscattering spectroscopy on the
picosecond to nanosecond time- and Ångstrom length-scale.
Internal protein dynamics were analysed in a first approach
using stretched exponential functions. In denatured BSA
predominantly slow heterogeneous dynamics dominates the
observed macromolecular motions. Reduction of disulphide
bridges in denatured BSA does not significantly alter the
visible motions. In native folded BSA fast homogeneous
dynamics and slow heterogeneous dynamics were observed. In
an alternative data analysis approach, internal protein
dynamics was interpreted using the analytical model of the
overdamped Brownian oscillator, which allowed us to extract
mean square displacements of protein internal dynamics and
the fraction of hydrogen atoms participating in the observed
motions. Our results demonstrate that denaturation modifies
the physical nature of internal protein dynamics
significantly as compared to the native folded structure.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
ddc = {540},
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) / 6215 - Soft Matter,
Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
experiment = {EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)SPHERES-20140101 /
EXP:(DE-MLZ)TOF-TOF-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29392269},
UT = {WOS:000425107800053},
doi = {10.1039/C7CP08292D},
url = {https://juser.fz-juelich.de/record/844243},
}