| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2009: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2008: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2007: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Research Abstract |
Archaeal-type rhodopsins were found in Archaea, but the recent genome sequencing projects have revealed that archaeal rhodopsins also exist in Eukarya and Eubacteria. In this grant project, we investigated molecular mechanism of light-energy and light-signal conversions in newly discovered archaeal-type rhodopsins. Comprehensive Fourier-transform infrared (FTIR) analysis led to a finding that proton-pumping rhodopsins possess strongly hydrogen-bonded water molecules, suggesting that such an internal water is the functional determinant of light-driven proton pump.
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