| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Ion selectivity and ion transports through ion channels are essential for life: Living cells generate electrical signals by utilizing selective ion permeation through channels. The aim of this study is to reveal the relationship between ion selectivity and ion permeation. The electrophysiological measurement employing the punch through method implies that the shape of the current-voltage (i-V) curve differs among ion species. In order to explain this difference, the relationship between the shape of i-V curve and the rate-determining step of ion permeation was analyzed by using the molecular dynamics simulation. The shape of the i-V curve of sodium ions through the potassium channel was predicted to be superlinear, which is considered to contribute to the selectivity for potassium over sodium at low voltage.
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