Global analysis of circadian expression in the cyanobacterium Synechocystis sp. strain PCC 6803.

ABSTRACT: Cyanobacteria are the only bacterial species found to have a circadian clock. We used DNA microarrays to examine circadian expression patterns in the cyanobacterium Synechocystis sp. strain PCC 6803. Our analysis identified 54 (2%) and 237 (9%) genes that exhibited circadian rhythms under stringent and relaxed filtering conditions, respectively. The expression of most cycling genes peaked around the time of transition from subjective day to night, suggesting that the main role of the circadian clock in Synechocystis is to adjust the physiological state of the cell to the upcoming night environment. There were several chromosomal regions where neighboring genes were expressed with similar circadian patterns. The physiological functions of the cycling genes were diverse and included a wide v

SUBMITTER: Kucho K 

PROVIDER: S-EPMC1064041 | biostudies-literature | 2005 Mar

REPOSITORIES: biostudies-literature