2012 Fiscal Year Final Research Report
Deformation ofwater originated byasolutemolecuIeand response from water
| Project Area | Water plays a key role in ATP hydrolysis and ATP-driven functions of proteins |
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| Project/Area Number |
20118007
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Complex systems
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| Research Institution | Kyushu University |
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Principal Investigator |
AKIYAMA Ryo 九州大学, 大学院・理学研究院, 准教授 (60363347)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIMORI Akira 九州大学, 大学院・理学研究院, 准教授 (90260588)
TOKUNAGA Ken 工学院大学, 基礎・教養教育部門, 助教 (30467873)
KUBOTA Yoji 九州大学, 大学院・理学研究院, 特任助教 (20639033)
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| Project Period (FY) |
2008 – 2012
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| Keywords | 化学物理 / 生物物理 / 液体論 / 分子認識 / 多成分系の熱力学 |
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| Research Abstract |
Existence of hyper-mobile water, whose motion is faster than that of bulk water, has been expected on the basis of the dielectric spectroscopy for the aqueous solution of molecular motors driven by ATP hydrolysis. The relation between the function of molecular motor and the hyper-mobile water has been discussed. We calculated the rotational and the dielectric time correlation functions of water around an ion on the basis of the trajectory of molecular dynamics simulation. The results showed that the water near by the ion gave fast dielectric relaxation although the rotational relaxation was slow. A new picture for hyper-mobile water was proposed. And we also calculated strong attractive interaction between two like-charged macroions immersed in electrolyte solution. The relation between ATP hydrolysis and treadmill motion of actins was discussed.
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