By Jayna L. Ditty, Shannon R. Mackey, Carl H. Johnson
Since the invention of circadian rhythms in cyanobacteria within the overdue Eighties, the sector has exploded with new details. The cyanobacterial version process for learning circadian rhythms, "Synechococcus elongatus", has allowed a close genetic dissection of the bacterial clock as a result of tools at the moment on hand in molecular, structural, and evolutionary biology.
This booklet addresses a number of elements of bacterial circadian courses: the historical past and historical past of the cyanobacteria and circadian rhythms in microorganisms, the molecular foundation, constitution, and evolution of the circadian clock, entrainment of the oscillator with the surroundings and the keep an eye on of downstream strategies by way of the clock, the demonstration of adaptive importance and the prokaryotic clock’s awesome balance, and mathematical and artificial oscillator types for clock function.
Experts within the box supply a well timed and accomplished assessment and a stepping-stone for destiny paintings in this outstanding workforce of microorganisms and timing.
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Extra resources for Bacterial Circadian Programs
Marinus MIT 9215 P. marinus MIT 9301 P. marinus MIT 9303 P. marinus MIT 9312 P. marinus MIT 9313 P. marinus MIT 9515 P. marinus NATL1A P. marinus NATL2A Synechococcus sp. BL107 Synechococcus sp. CC 9311 Synechococcus sp. CC 9605 Synechococcus sp. CC 9902 Synechococcus sp. JA-2-3B’ Synechococcus sp. JA-3-3-Ab Synechococcus sp. RCC 307 Synechococcus sp. RS9916 Synechococcus sp. RS9917 Synechococcus sp. WH 5701 Synechococcus sp. WH 7803 Synechococcus sp. WH 7805 Synechococcus sp. B. Williams 519 (81); 505 (55); 568 (36) 518 (81) 519 (83) – F; u Hot spring; u M; N, u T, rock; u Synechocystis sp.
If one is interested in a mechanistic, biochemical description of how the Kai proteins interact to keep time, then one system is probably as good as another. 1 – must be understood in the context of that cyanobacterium’s interactions with its particular environment. And, because much of the variability seems to be on the input side of the system, the organism’s ability to sense the environment determines the molecular details of circadian timing input. Thus, understanding the ecology and evolutionary history of a particular organism, as hinted at above, is paramount to understanding that organism’s circadian timing mechanism.
Typical aquatic Synechococcus species have doubling times of 6–8 h, whereas those of the Prochlorococcus genera tend to be around 20–30 h (Vaulot et al. 1995; Shalapyonok et al. 1998; Jacquet et al. 2001). Amazingly, it has been estimated that some cyanobacterial populations in the cold, oligotrophic, dry deserts of Antarctica may have doubling times of nearly 10,000 years (Friedmann et al. 1993; Nienow and Friedmann 1993). Carbon dating of samples from these polar regions supports one implication of this slow growth rate estimate by showing that living cyanobacterial cells may be over 1000 years old (Bonani et al.
Bacterial Circadian Programs by Jayna L. Ditty, Shannon R. Mackey, Carl H. Johnson