Internal daily clock system in cyanobacteria

Cyanobacteria demonstrate complex circadian rhythms through multiple feedback processes.

• Cyanobacteria are the simplest organisms known to exhibit circadian rhythms.
• The molecular and genetic mechanisms involved in circadian rhythm generation in cyanobacteria are explored.
• Recent findings have identified multiple feedback processes within the prokaryotic circadian system.
• A novel molecular oscillator model has been proposed based on these analyses.
• Current understanding and open questions regarding the cyanobacterial oscillator are summarized.

Simplified