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学術論文

Direct observation of ultrafast collective motions in CO myoglobin upon ligand dissociation

MPS-Authors
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Barends,  Thomas R.M.
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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Foucar,  Lutz
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Ardevol,  Albert
Department of Theoretical Biophysics, Max Planck Institute of Biophysics, Max Planck Society;

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Nass,  Karol
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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Botha,  Sabine
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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Doak,  R. Bruce
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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Hartmann,  Elisabeth
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Hilpert,  Mario
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Heinz,  Marcel       
Department of Theoretical Biophysics, Max Planck Institute of Biophysics, Max Planck Society;
Institut für Physikalische und Theoretische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438 Frankfurt am Main, Germany;

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Köfinger,  Jürgen       
Department of Theoretical Biophysics, Max Planck Institute of Biophysics, Max Planck Society;

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Kovacsova,  Gabriela
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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Reinstein,  Jochen
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Roome,  Christopher M.
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Shoeman,  Robert L.
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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Hummer,  Gerhard       
Department of Theoretical Biophysics, Max Planck Institute of Biophysics, Max Planck Society;

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Schlichting,  Ilme
Coherent diffractive imaging, Max Planck Institute for Medical Research, Max Planck Society;

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引用

Barends, T. R., Foucar, L., Ardevol, A., Nass, K., Aquila, A., Botha, S., Doak, R. B., Falahati, K., Hartmann, E., Hilpert, M., Heinz, M., Hoffmann, M. C., Köfinger, J., Koglin, J. E., Kovacsova, G., Liang, M., Milathianaki, D., Lemke, H. T., Reinstein, J., Roome, C. M., Shoeman, R. L., Williams, G. J., Burghardt, I., Hummer, G., Boutet, S., & Schlichting, I. (2015). Direct observation of ultrafast collective motions in CO myoglobin upon ligand dissociation. Science, 350(6259), 445-450. doi:10.1126/science.aac5492.


引用: https://hdl.handle.net/11858/00-001M-0000-002A-40AC-E
要旨
The hemoprotein myoglobin is a model system for the study of protein dynamics. We used time-resolved serial femtosecond crystallography at an x-ray free-electron laser to resolve the ultrafast structural changes in the carbonmonoxy myoglobin complex upon photolysis of the Fe-CO bond. Structural changes appear throughout the protein within 500 femtoseconds, with the C, F, and H helices moving away from the heme cofactor and the E and A helices moving toward it. These collective movements are predicted by hybrid quantum mechanics/molecular mechanics simulations. Together with the observed oscillations of residues contacting the heme, our calculations support the prediction that an immediate collective response of the protein occurs upon ligand dissociation, as a result of heme vibrational modes coupling to global modes of the protein.