The mutant of sll1961, which encodes a putative transcriptional regulator, has a defect in regulation of photosystem stoichiometry in the cyanobacterium Synechocystis sp. PCC 6803

Tamaki Fujimori, Mieko Higuchi, Hanayo Sato, Hiroshi Aiba, Masayuki Muramatsu, Yukako Hihara, Kintake Sonoike*

*この研究の対応する著者

研究成果: Review article査読

40 被引用数 (Scopus)

抄録

In acclimation to changing light environments, photosynthetic organisms modulate the ratio of two photosynthetic reaction centers (photosystem I [PSI] and photosystem II). One mutant, which could not modulate photosystem stoichiometry upon the shift to high light, was isolated from mutants created by random transposon mutagenesis. Measurements of chlorophyll fluorescence and analysis of the reaction center subunits of PSI through western blotting in this mutant revealed that the content of PSI could not be suppressed under high-light condition. In the mutant, transposon was inserted to the sll1961 gene encoding a putative transcriptional regulator. DNA microarray analysis revealed that the expression of sll1773 was drastically induced in the sll1961 mutant upon exposure to high light for 3 h. Our results demonstrate that a transcriptional regulator, Sll1961, and its possible target proteins, including Sll1773, may be responsible for the regulation of photosystem stoichiometry in response to high light.

本文言語English
ページ(範囲)408-416
ページ数9
ジャーナルPlant Physiology
139
1
DOI
出版ステータスPublished - 2005
外部発表はい

ASJC Scopus subject areas

  • 生理学
  • 遺伝学
  • 植物科学

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