TY - JOUR
T1 - 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
AU - Fujimori, Tamaki
AU - Higuchi, Mieko
AU - Sato, Hanayo
AU - Aiba, Hiroshi
AU - Muramatsu, Masayuki
AU - Hihara, Yukako
AU - Sonoike, Kintake
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
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U2 - 10.1104/pp.105.064782
DO - 10.1104/pp.105.064782
M3 - Review article
C2 - 16113218
AN - SCOPUS:33644807795
VL - 139
SP - 408
EP - 416
JO - Plant Physiology
JF - Plant Physiology
SN - 0032-0889
IS - 1
ER -