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Proceedings Paper

Low-frequency dynamics of proteins and aqueous solutions studied by terahertz time-domain spectroscopy
Author(s): Naoki Yamamoto; Akané Ishihara; Azusa Kaneko; Haruka Iguchi; Ohki Kambara; Atsuo Tamura; Keisuke Tominaga
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Paper Abstract

We studied low-frequency spectra of hydration water molecules around the hydrophobic probe in an aqueous solution by using tetraalkylammonium cation as a probe and terahertz time-domain spectroscopic technique. The phenomenon, called dynamical transition, has been known to be universally observed among proteins and polypeptides. In this work we investigated temperature and hydration dependence of low-frequency dynamics to clarify relationships between the dynamical transition and protein structures, and its functional states. We also mention general behaviors of the lowfrequency spectra of globular proteins.

Paper Details

Date Published: 14 March 2013
PDF: 9 pages
Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 862306 (14 March 2013); doi: 10.1117/12.2007253
Show Author Affiliations
Naoki Yamamoto, Kobe Univ. (Japan)
Akané Ishihara, Kobe Univ. (Japan)
Azusa Kaneko, Kobe Univ. (Japan)
Haruka Iguchi, Kobe Univ. (Japan)
Ohki Kambara, Kobe Univ. (Japan)
Atsuo Tamura, Kobe Univ. (Japan)
Keisuke Tominaga, Kobe Univ. (Japan)

Published in SPIE Proceedings Vol. 8623:
Ultrafast Phenomena and Nanophotonics XVII
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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