| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2012: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Research Abstract |
We have investigated the molecular mechanism of photosynthetic water oxidation using light-induced Fourier transform infrared difference spectroscopy and revealed the number of protons released upon individual intermediate transitions, the efficiencies of transitions, the structures and the roles of amino-acids coupled to the Mn cluster, the effect of an inhibitor on water oxidation reactions, and the regulation mechanism by extrinsic proteins. We also studied proton-coupled electron transfer in the water oxidation reaction using time-resolved infrared spectroscopy and obtained experimental evidence that proton is released before the electron transfer in the S3→S0transition, in which molecular oxygen is evolved.
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