Circadian programming in cyanobacteria.

Mori T, Johnson CH
Semin Cell Dev Biol. 2001 12 (4): 271-8

PMID: 11463211 · DOI:10.1006/scdb.2001.0254

Prokaryotic cyanobacteria express robust circadian (daily) rhythms under the control of a timing mechanism that is independent of the cell division cycle. This biological clock orchestrates global regulation of gene expression. Competition experiments demonstrate that fitness is enhanced when the circadian period is consonant with the period of the environmental cycle. Mutational analyses have identified three clock genes in the organism, one of which is related to DNA recombinases and helicases. We propose a new model for the core 'clockwork' that implicates rhythmic changes in the status of the chromosome that underly the rhythms of gene expression.

Copyright 2001 Academic Press.

MeSH Terms (8)

Biological Clocks Cell Division Circadian Rhythm Cyanobacteria Gene Expression Regulation, Bacterial Luminescent Measurements Models, Biological Photoperiod

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