論文

査読有り 国際誌
2017年3月

CSL encodes a leucine-rich-repeat protein implicated in red/violet light signaling to the circadian clock in Chlamydomonas.

PLoS Genetics
  • Ayumi Kinoshita
  • ,
  • Yoshimi Niwa
  • ,
  • Kiyoshi Onai
  • ,
  • Takashi Yamano
  • ,
  • Hideya Fukuzawa
  • ,
  • Masahiro Ishiura
  • ,
  • Takuya Matsuo

13
3
開始ページ
e1006645
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1371/journal.pgen.1006645

The green alga Chlamydomonas reinhardtii shows various light responses in behavior and physiology. One such photoresponse is the circadian clock, which can be reset by external light signals to entrain its oscillation to daily environmental cycles. In a previous report, we suggested that a light-induced degradation of the clock protein ROC15 is a trigger to reset the circadian clock in Chlamydomonas. However, light signaling pathways of this process remained unclear. Here, we screened for mutants that show abnormal ROC15 diurnal rhythms, including the light-induced protein degradation at dawn, using a luciferase fusion reporter. In one mutant, ROC15 degradation and phase resetting of the circadian clock by light were impaired. Interestingly, the impairments were observed in response to red and violet light, but not to blue light. We revealed that an uncharacterized gene encoding a protein similar to RAS-signaling-related leucine-rich repeat (LRR) proteins is responsible for the mutant phenotypes. Our results indicate that a previously uncharacterized red/violet light signaling pathway is involved in the phase resetting of circadian clock in Chlamydomonas.

リンク情報
DOI
https://doi.org/10.1371/journal.pgen.1006645
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28333924
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5363811

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