期刊
CELLULAR AND MOLECULAR LIFE SCIENCES
卷 66, 期 23, 页码 3697-3710出版社
SPRINGER BASEL AG
DOI: 10.1007/s00018-009-0103-6
关键词
Adaptation; Cyanobacteria; Cyanophage; D1 protein; psbA gene; Regulation of gene expression; Stress responses
资金
- Academy of Finland [110099, 118637]
- Nordic Energy Research Program (BioH2)
- European FP7 SOLAR-H2 Program [212508]
- Maj and Tor Nessling Foundation
- Academy of Finland (AKA) [110099, 110099] Funding Source: Academy of Finland (AKA)
The D1 protein of Photosystem II (PSII), encoded by the psbA genes, is an indispensable component of oxygenic photosynthesis. Due to strongly oxidative chemistry of PSII water splitting, the D1 protein is prone to constant photodamage requiring its replacement, whereas most of the other PSII subunits remain ordinarily undamaged. In cyanobacteria, the D1 protein is encoded by a psbA gene family, whose members are differentially expressed according to environmental cues. Here, the regulation of the psbA gene expression is first discussed with emphasis on the model organisms Synechococcus sp. and Synechocystis sp. Then, a general classification of cyanobacterial D1 isoforms in various cyanobacterial species into D1(m), D1:1, D1:2, and D1' forms depending on their expression pattern under acclimated growth conditions and upon stress is discussed, taking into consideration the phototolerance of different D1 forms and the expression conditions of respective members of the psbA gene family.
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