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Ultrafast Anisotropy Measurements on Charge Transfer Dynamics in Plastocyanin
Author(s) -
Nakashima Satoru,
Seike Kazushige,
Nagasawa Yutaka,
Okada Tadashi,
Sato Maki,
Kohzuma Takamitsu
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000094
Subject(s) - plastocyanin , chemistry , charge (physics) , copper protein , ultrashort pulse , excitation , protein dynamics , chemical physics , dynamics (music) , anisotropy , photosynthetic reaction centre , molecular physics , atomic physics , copper , electron transfer , photochemistry , molecular dynamics , computational chemistry , optics , physics , quantum mechanics , laser , biochemistry , photosystem i , chloroplast , organic chemistry , acoustics , gene
Using a blue copper protein, plastocyanin, we have studied protein dynamics associated with optical excitation of the charge‐transfer band of plastocyanin by ultrafast pump‐probe measurements. In this study we show the first clear evidence of a coherency of the protein motion that is induced by the charge‐transfer reaction. The formerly observed low‐frequency vibrational mode (33 cm −1 ) is attributed to the coherent motion of the protein by the anisotropy measurement. In this charge‐transfer reaction, not only stochastic process, but coherent motion of protein is revealed to play a key role in the reaction.