2017 Fiscal Year Final Research Report
Characterization of a novel aqueous astaxanthin binding protein found in microalgae
| Project/Area Number |
26440155
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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 molecular biology/Plant physiology
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| Research Institution | Tokyo University of Agriculture |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 微細藻類 / 極限環境 / カロテノイド / アスタキサンチン / 強光ストレス / 光酸化ストレス / 活性酸素 / 有用物質生産 |
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| Outline of Final Research Achievements |
Under extreme environmental conditions such as desiccation and high salinity combined with high light irradiation, it is difficult for higher plants to survive because light energy, in combination with oxygen, leads to the generation of reactive oxygen species under water stress conditions. A microalga, strain Ki-4 was previously isolated from asphalt in midsummer, and a novel water-soluble astaxanthin binding protein, named AstaP, was identified from this microalga. AstaP is thought to enable the microalga to survive under the extreme photooxidative stress conditions. We have identified the function of AstaP as a novel functional molecule to protect photooxidative stresses in the strain Ki-4. We concluded that AstaP functions at the cell surface of the strain Ki-4 to protect the single cells under severe photooxidative stress conditions.
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| Free Research Field |
Microbiology
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