| Project/Area Number |
26410183
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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 |
Bio-related chemistry
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| Research Institution | Osaka City University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
勝村 成雄 大阪市立大学, 大学院理学研究科, 客員教授 (70047364)
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| Co-Investigator(Renkei-kenkyūsha) |
HASHIMOTO HIDEKI 大阪市立大学, 複合先端研究機構, 教授 (50222211)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | フコキサンチン / 海洋光合成初期過程 / 超分子複合体 / ICT準位 / 超効率的エネルギー伝達 / パラセントロン / 光合成初期過程 / 両官能性C5ジエン / クロスカップリング / スフェロイデノン / 両官能性C5ジエンユニット / クロスカップリング反応 / 両官能性ジエン / カロテノイド / エネルギー伝達 |
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| Outline of Final Research Achievements |
The highly oxidized marine carotenoid fucoxanthin is a representative light-harvesting pigment for photosynthesis in the sea. This carotenoid exhibits exceptionally high-energy transfer efficiency (>85%) in the fucoxanthin -chlorophyll a-protein (FCP) complex. In this project, we succeeded in the synthesis of natural apocarotenoid paracentrone, which was a one cyclohexane-moiety free analogue of fucoxanthin, and its derivatives by the sequential cross coupling reactions of novel bifunctional C5 diene units as key building brocks. The ultrafast time resolved spectra measurement of paracentrone revealed that this carotenoid possessed the intramolecular charge transfer (ICT) state, which contributed to the remarkably high light-harvesting efficiency in marine photosynthesis. Toward elucidation of the mechanism of this super function by marine photosynthetic organisms, reconstitution of the corresponding super complex containing paracentrone is in progress.
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