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- Title
Cooperation of group 2 σ factors, SigD and SigE for light-induced transcription in the cyanobacterium Synechocystis sp. PCC 6803
- Authors
Yoshimura, Tsutomu; Imamura, Sousuke; Tanaka, Kan; Shirai, Makoto; Asayama, Munehiko
- Abstract
Abstract: A light-inducible σ factor of RNA polymerase, SigD, can contributes to the light-induced transcription of psbA in the cyanobacterium Synechocystis sp. PCC 6803. Here, another light-induced σ factor, SigE, was characterized together with SigD. Results indicated that SigE also contributes to light-induced transcription on the cpcBACD, psbA, petBD and psaAB promoters whose potential sequences are of the Escherichia coli σ70-type. SigD and SigE interfere with each other’s expression. A rhythmic expression, in which the periodic peak of SigE exhibits a 24-h interval according to the upcoming night, was observed at the protein level. The cooperation of group 2 σ factors, SigD and SigE, for light-induced transcription was discussed.
- Subjects
GENETIC transcription; NUCLEIC acids; ESCHERICHIA; RNA polymerases
- Publication
FEBS Letters, 2007, Vol 581, Issue 7, p1495
- ISSN
0014-5793
- Publication type
Article
- DOI
10.1016/j.febslet.2007.03.010