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Retracted: The circadian rhythm regulator RpaA modulates photosynthetic electron transport and alters the preferable temperature range for growth in a cyanobacterium
Author(s) -
Hasegawa Hazuki,
Tsurumaki Tatsuhiro,
Imamura Sousuke,
Sonoike Kintake,
Tanaka Kan
Publication year - 2021
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1002/1873-3468.14075
Subject(s) - regulator , circadian rhythm , electron transport chain , cyanobacteria , photosynthesis , mutant , biophysics , synechococcus , strain (injury) , photosystem ii , biology , microbiology and biotechnology , chemistry , botany , biochemistry , gene , genetics , bacteria , neuroscience , anatomy
Cyanobacterial strains can grow within a specific temperature range that approximately corresponds to their natural habitat. However, how the p referable t emperature r ange for g rowth (PTRG) is determined at the molecular level remains unclear. In this study, we detected a PTRG upshift in a mutant strain of Synechococcus elongatus PCC 7942 lacking the circadian rhythm regulator RpaA. Subsequent analyses revealed that RpaA decreases the electron transport from photosystem I to NADPH. The change in electron transport likely inhibits H 2 O 2 generation under high‐temperature conditions and contributes to the observed PTRG upshift in rpaA ‐deficient cells. The importance of the effects of the circadian rhythm regulator on the PTRG is discussed.