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@ARTICLE{Grimaldo:187418,
author = {Grimaldo, Marco and Roosen-Runge, Felix and Hennig, Marcus
and Zanini, Fabio and Zhang, Fajun and Jalarvo, Niina and
Zamponi, Michaela and Schreiber, Frank and Seydel, Tilo},
title = {{H}ierarchical molecular dynamics of bovine serum albumin
in concentrated aqueous solution below and above thermal
denaturation},
journal = {Physical chemistry, chemical physics},
volume = {17},
number = {6},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2015-01087},
pages = {4645 - 4655},
year = {2015},
abstract = {The dynamics of proteins in solution is a complex and
hierarchical process, affected by the aqueous environment as
well as temperature. We present a comprehensive study on
nanosecond time and nanometer length scales below, at, and
above the denaturation temperature Td. Our experimental data
evidence dynamical processes in protein solutions on three
distinct time scales. We suggest a consistent physical
picture of hierarchical protein dynamics: (i) self-diffusion
of the entire protein molecule is confirmed to agree with
colloid theory for all temperatures where the protein is in
its native conformational state. At higher temperatures T >
Td, the self-diffusion is strongly obstructed by
cross-linking or entanglement. (ii) The amplitude of
backbone fluctuations grows with increasing T, and a
transition in its dynamics is observed above Td. (iii) The
number of mobile side-chains increases sharply at Td while
their average dynamics exhibits only little variations. The
combination of quasi-elastic neutron scattering and the
presented analytical framework provides a detailed
microscopic picture of the protein molecular dynamics in
solution, thereby reflecting the changes of macroscopic
properties such as cluster formation and gelation.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1 / Jülich Centre for
Neutron Science JCNS (JCNS) ; JCNS / JCNS (München) ;
Jülich Centre for Neutron Science JCNS (München) ;
JCNS-FRM-II},
ddc = {540},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-SNS-20110128 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000349005900077},
pubmed = {pmid:25587698},
doi = {10.1039/C4CP04944F},
url = {https://juser.fz-juelich.de/record/187418},
}