| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
Circadian clocks are intrinsic, entrainable mechanism that generate biological rhythms with approximately a 24 h period. Circadian rhythms are widespread in many biological processes of almost all organisms including plants. A clock provides plants with an adaptive advantage to anticipate and respond to daily changes in environmental conditions such as day and night, and seasonal changes in photoperiod. Oscillator components to define the molecular mechanism of circadian clock in plants are composed of plant specific proteins. In this study, biochemical properties of central oscillator proteins, pseudo-response regulator (PRR) family were investigated. It was revealed that PRRs function as transcriptional repressors in the central oscillator circuit. In vitro phosphotransfer experiment made it possible to show that a Bryophyte PRR, which is thought to be a prototype of PRR family, has phospho-accepter activity, suggesting that PRRs were diversified from a bona fide response regulator.
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