Isolation of photoprotective signal transduction mutants by systematic bioluminescence screening in Chlamydomonas reinhardtii

Scientific Reports
Ryutaro TokutsuJun Minagawa

Abstract

In photosynthetic organisms, photoprotection to avoid overexcitation of photosystems is a prerequisite for survival. Green algae have evolved light-inducible photoprotective mechanisms mediated by genes such as light-harvesting complex stress-related (LHCSR). Studies on the light-dependent regulation of LHCSR expression in the green alga Chlamydomonas reinhardtii have revealed that photoreceptors for blue light (phototropin) and ultraviolet light perception (UVR8) play key roles in initiating photoprotective signal transduction. Although initial light perception via phototropin or UVR8 is known to result in increased LHCSR3 and LHCSR1 gene expression, respectively, the mechanisms of signal transduction from the input (light perception) to the output (gene expression) remain unclear. In this study, to further elucidate the signal transduction pathway of the photoprotective response of green algae, we established a systematic screening protocol for UV-inducible LHCSR1 gene expression mutants using a bioluminescence reporter assay. Following random mutagenesis screening, we succeeded in isolating mutants deficient in LHCSR1 gene and protein expression after UV illumination. Further characterization revealed that the obtained mutan...Continue Reading

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Mar 21, 2018·Proceedings of the National Academy of Sciences of the United States of America·Kotaro KosugeJun Minagawa

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Citations

Sep 22, 2019·Journal of Plant Research·Ryo FurukawaAtsushi Takabayashi
Feb 6, 2021·Proceedings of the National Academy of Sciences of the United States of America·Roman PodolecRoman Ulm
Feb 28, 2021·Annual Review of Plant Biology·Roman PodolecRoman Ulm
Jul 10, 2021·Nature Plants·Xiaowei PanMei Li

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