| Project/Area Number |
15K07037
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biophysics
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| Research Institution | Kindai University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
鷹野 優 広島市立大学, 情報科学研究科, 教授 (30403017)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAGAWA Atushi 大阪大学, 蛋白質研究所, 教授 (20188890)
OKAMURA Yasushi 大阪大学, 医学研究科, 教授 (80201987)
TAKESITA Kouhei 大阪大学, 蛋白質研究所, 特任助教 (80346808)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 生体膜間物質輸送 / 分子動力学シミュレーション / プロトン透過 / 膜輸送機構 / 膜タンパク質 / 分子シミュレーション / 膜蛋白質 |
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| Outline of Final Research Achievements |
Voltage Sensor Only Protein (VSOP) having simple and small structure would be a superior model system than the Kv-channel protein to elucidate a material transport molecular mechanism across bio-membrane.
We studied the mechanism of VSOP using molecular dynamics simulation method. We then focused the voltage-dependent proton conduction mechanism. On the basis of the hypothesis where for activation, S4 helix vertically moves against membrane, we constructed a lots of VSOP structures with different S4 configurations by molecular modeling and long-time molecular dynamics simulations. We then obtained several important structures. An open structure candidate of VSOP which shows proton conduction pass along with typical salt-bridges between Arginine and Glutamine, also a structure candidate of closed VSOP which indicates completely inhibition of water transporting. Those structures should be useful to investigate the intrinsic transporting mechanism of membrane proteins.
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