Extreme conservation and non-neutral evolution of the cpmA Circadian locus in a globally distributed Chroococcidiopsis sp. from naturally stressful habitats.

Abstract excerpt

Cyanobacteria are among the most ancient organisms known to have circadian rhythms. The cpmA gene is involved in controlling the circadian output signal. We studied polymorphism and divergence of this gene in six populations of a stress-tolerant cyanobacterium, Chroococcidiopsis sp., sampled in extreme habitats across the globe. Despite high haplotype diversity (0.774), nucleotide diversity of cpmA is very low (π...

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