New models for circadian systems in microorganisms

Abstract Microorganisms provide important model systems for studying circadian rhythms, and they are overturning established ideas about the molecular mechanisms of rhythmicity. The transcription/translation feedback model that has been accepted as the basis of circadian clock mechanisms in eukaryot...

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Bibliographic Details
Published in:FEMS microbiology letters 2006-06, Vol.259 (1), p.1-6
Main Author: Lakin-Thomas, Patricia L.
Format: Article
Language:English
Subjects:
Acetabularia
Acetabularia - genetics
Acetabularia - physiology
Algae
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Bacteriology
Biological and medical sciences
Biological clocks
Circadian rhythm
Circadian Rhythm - physiology
Circadian rhythms
Clock gene
cyanobacteria
Eukaryotes
Fundamental and applied biological sciences. Psychology
Fungal Proteins - genetics
Fungal Proteins - metabolism
Fungi
Gene Expression Regulation, Bacterial
Gene Expression Regulation, Fungal
Growth, nutrition, cell differenciation
Growth, nutrition, metabolism, transports, enzymes. Molecular biology
KaiC protein
Microbiology
Microorganisms
Models, Biological
Molecular modelling
Mutation
Mycology
Neurospora
Neurospora - genetics
Neurospora - physiology
Phosphorylation
Plant cytology, morphology, systematics, chorology and evolution
Synechococcus
Synechococcus - genetics
Synechococcus - physiology
Thallophyta
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Summary:Abstract Microorganisms provide important model systems for studying circadian rhythms, and they are overturning established ideas about the molecular mechanisms of rhythmicity. The transcription/translation feedback model that has been accepted as the basis of circadian clock mechanisms in eukaryotes does not account for old data from the alga Acetabularia demonstrating that transcription is not required for rhythmicity. Moreover, new results showing in vitro rhythmicity of KaiC protein phosphorylation in the cyanobacterium Synechococcus, and rhythmicity in strains of the fungus Neurospora carrying clock gene null mutations, require new ways of looking at circadian systems.
ISSN:0378-1097
1574-6968
DOI:10.1111/j.1574-6968.2006.00211.x