| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Outline of Final Research Achievements |
In photosynthesis of higher plants and algae, the photosystem II (PSII) protein catalyzes a water-splitting reaction where two water molecules are split into one oxygen molecule and four protons by using light energy. We clarified the reaction mechanism of the water-splitting reaction by using quantum chemical calculations. The reaction is composed of four steps. In the first step, one proton is transferred through a water chain near the active site (the Mn4CaO5 cluster) of PSII. In the third step, other proton is transferred via the asparagine side chain (D1-Asp61) located at the vicinity of the Mn4CaO5 cluster. The remaining protons are released when turning over from the fourth step to the first step.
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