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ID 116638
Inoue, Rintaro Kyoto University
Oda, Takashi Yokohama City University|Rikkyo University
Nakagawa, Hiroshi Japan Atomic Energy Agency
Tominaga, Taiki Comprehensive Research Organization for Science and Society
Kawakita, Yukinobu Japan Atomic Energy Agency
Shimizu, Masahiro Kyoto University
Okuda, Aya Kyoto University
Morishima, Ken Kyoto University
Sato, Nobuhiro Kyoto University
Urade, Reiko Kyoto University
Sato, Mamoru Yokohama City University
Sugiyama, Masaaki Kyoto University
Content Type
Journal Article
Incoherent quasielastic neutron scattering (iQENS) is a fascinating technique for investigating the internal dynamics of protein. However, low flux of neutron beam, low signal to noise ratio of QENS spectrometers and unavailability of well-established analyzing method have been obstacles for studying internal dynamics under physiological condition (in solution). The recent progress of neutron source and spectrometer provide the fine iQENS profile with high statistics and as well the progress of computational technique enable us to quantitatively reveal the internal dynamic from the obtained iQENS profile. The internal dynamics of two proteins, globular domain protein (GDP) and intrinsically disordered protein (IDP) in solution, were measured with the state-of-the art QENS spectrometer and then revealed with the newly developed analyzing method. It was clarified that the average relaxation rate of IDP was larger than that of GDP and the fraction of mobile H atoms of IDP was also much higher than that of GDP. Combined with the structural analysis and the calculation of solvent accessible surface area of amino acid residue, it was concluded that the internal dynamics were related to the highly solvent exposed amino acid residues depending upon protein’s structure.
Journal Title
Scientific Reports
Springer Nature
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Institute of Advanced Medical Sciences