2016 Fiscal Year Final Research Report
Analysis of the mechanism to prevent the inactivation of Rubisco by oxygen oxidation
| Project/Area Number |
26450081
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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 |
Plant nutrition/Soil science
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 光合成 / ルビスコ / 炭酸固定 / BSD2 / CYO2 |
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| Outline of Final Research Achievements |
Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) is the key enzyme for atmospheric CO2 fixation. The Arabidopsis bsd2 mutant showed a significant reduction in photosynthetic capacity and was unable to grow autotrophically. BSD2 directly interacts with Rubisco, and recombinant BSD2 could reduce the oxidized form of Rubisco in vitro via disulfide reductase activity. A role for BSD2 in maintaining Rubisco activity was further supported in Arabidopsis BSD2-overexpression lines where Rubisco activation status and photosynthetic activity were higher than wild type. Our results demonstrate that BSD2 is key in the mechanisms that regulates the reactivation of oxidized Rubisco, thereby maintaining functional photosynthesis in plants.
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| Free Research Field |
光合成
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