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  Collective THz dynamics in living Escherichia coli cells

Sebastiani, F., Orecchini, A., Paciaroni, A., Jasnin, M., Zaccai, G., Moulin, M., et al. (2013). Collective THz dynamics in living Escherichia coli cells. CHEMICAL PHYSICS, 424, 84-88. doi:10.1016/j.chemphys.2013.06.020.

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Sebastiani, F.1, Autor
Orecchini, A.1, Autor
Paciaroni, A.1, Autor
Jasnin, M.2, Autor           
Zaccai, G.1, Autor
Moulin, M.1, Autor
Haertlein, M.1, Autor
De Francesco, A.1, Autor
Petrillo, C.1, Autor
Sacchetti, F.1, Autor
Affiliations:
1external, ou_persistent22              
2Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565142              

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Schlagwörter: BRILLOUIN NEUTRON SPECTROSCOPY; IN-VIVO; NMR-SPECTROSCOPY; HYDRATION WATER; LIQUID WATER; SCATTERING; PROTEINS; STABILITY; SOUND; SPECTROMETERIn vivo biomolecular dynamics; Picosecond collective density fluctuations; Brillouin neutron scattering;
 Zusammenfassung: We have employed neutron Brillouin spectroscopy to study coherent collective density fluctuations in the biological macromolecular components of living Escherichia coli cells. To highlight the contribution of the macromolecular material alone, a suitably prepared mixture of light and heavy water was exploited to cancel the scattering length of intracellular water. The present results indicate that the cellular biomaterial sustains THz coherent density fluctuations, characterised by a propagating mode travelling at about 3600 m/s and by a localised mode at energies between 4 and 7 meV. A comparison with both hydration water and simpler biomolecules, such as proteins or DNA, brings further support to the idea that the dynamical coupling between biomolecular structures and biological water provides the delicate dynamical adaptation needed to achieve a full biological functionality. Finally, the behaviour of the damping factors of the observed collective modes strengthens the dynamical similarity of biological systems with glass-forming materials. (C) 2013 Elsevier B. V. All rights reserved.

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Sprache(n): eng - English
 Datum: 2013
 Publikationsstatus: Erschienen
 Seiten: 5
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000326983700016
DOI: 10.1016/j.chemphys.2013.06.020
 Art des Abschluß: -

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Titel: CHEMICAL PHYSICS
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS : ELSEVIER SCIENCE BV
Seiten: - Band / Heft: 424 Artikelnummer: - Start- / Endseite: 84 - 88 Identifikator: ISSN: 0301-0104