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@ARTICLE{Stadler:763,
author = {Stadler, A.M. and Digel, I. and Artmann, G.M. and Embs,
J.P. and Zaccai, G. and Büldt, G.},
title = {{H}emoglobin {D}ynamics in {R}ed {B}lood {C}ells:
{C}orrelation to {B}ody {T}emperature},
journal = {Biophysical journal},
volume = {95},
issn = {0006-3495},
address = {New York, NY},
publisher = {Rockefeller Univ. Press},
reportid = {PreJuSER-763},
pages = {5449 - 5461},
year = {2008},
note = {This research project was supported by the European
Commission under the 6th Framework Programme through Key
Action: Strengthening the European Research Area, Research
Infrastructures, contract No. RII3-CT-2003505925.},
abstract = {A transition in hemoglobin behavior at close to body
temperature has been discovered recently by micropipette
aspiration experiments on single red blood cells (RBCs) and
circular dichroism spectroscopy on hemoglobin solutions. The
transition temperature was directly correlated to the body
temperatures of a variety of species. In an exploration of
the molecular basis for the transition, we present neutron
scattering measurements of the temperature dependence of
hemoglobin dynamics in whole human RBCs in vivo. The data
reveal a change in the geometry of internal protein motions
at 36.9 degrees C, at human body temperature. Above that
temperature, amino acid side-chain motions occupy larger
volumes than expected from normal temperature dependence,
indicating partial unfolding of the protein. Global protein
diffusion in RBCs was also measured and the findings
compared favorably with theoretical predictions for
short-time self-diffusion of noncharged hard-sphere
colloids. The results demonstrated that changes in molecular
dynamics in the picosecond time range and angstrom length
scale might well be connected to a macroscopic effect on
whole RBCs that occurs at body temperature.},
keywords = {Body Temperature / Diffusion / Elasticity / Erythrocytes:
metabolism / Hemoglobins: metabolism / Humans / Neutron
Diffraction / Protein Denaturation / Hemoglobins (NLM
Chemicals) / J (WoSType)},
cin = {INB-2},
ddc = {570},
cid = {I:(DE-Juel1)VDB805},
pnm = {Funktion und Dysfunktion des Nervensystems},
pid = {G:(DE-Juel1)FUEK409},
shelfmark = {Biophysics},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:18708462},
pmc = {pmc:PMC2586580},
UT = {WOS:000260999500043},
doi = {10.1529/biophysj.108.138040},
url = {https://juser.fz-juelich.de/record/763},
}