| Project/Area Number |
24870005
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Evolutionary biology
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| Research Institution | University of Tsukuba |
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Principal Investigator |
MINODA Ayumi 筑波大学, 生命環境系, 助教 (10597280)
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| Project Period (FY) |
2012-08-31 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | ルビスコ / 紅藻 / YCf30 / 葉緑体 / 転写制御 / Ycf30 / 光合成 / CO2 / 光 / 進化 / 転写因子 |
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| Research Abstract |
During evolution, ancestral plastids arose from a single endosymbiosis and have lost their autonomy through integration into the eukaryotic cell. However, a transcription factor, Ycf30 is retained in currently known plastid genomes of red algal and Glaucophyte lineages. Previously, we suggested transcriptional activation model of Rubisco operon by Ycf30 through sensing of photosynthetic metabolites in response to the environmental changes.
In this report, to test the model in vivo, we analyzed metabolites in response to the environmental changes. During the shift from high CO2 condition to air condition, 3-PGA and RuBP were specially accumulated. This result is agreed with the model suggested previously. Ycf30 senses the change in the accumulations of photosynthetic metabolites and activates the transcription of Rubisco operon in response to the environmental changes. Red algal plastidial transcription factors represent the last relics of the autonomy of the ancestral plastid.
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