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Transcriptional and post-transcriptional regulation of the circadian clock of cyanobacteria and Neurospora.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Brunner, Michael Schafmeier, Tobias |
| Copyright Year | 2006 |
| Abstract | Circadian clocks are self-sustained oscillators modulating rhythmic transcription of large numbers of genes. Clock-controlled gene expression manifests in circadian rhythmicity of many physiological and behavioral functions. In eukaryotes, expression of core clock components is organized in a network of interconnected positive and negative feedback loops. This network is thought to constitute the pacemaker that generates circadian rhythmicity. The network of interconnected loops is embedded in a supra-net via a large number of interacting factors that affect expression and function of core clock components on transcriptional and post-transcriptional levels. In particular, phosphorylation and dephosphorylation of clock components are critical processes ensuring robust self-sustained circadian rhythmicity and entrainment of clocks to external cues. In cyanobacteria, three clock proteins have the capacity to generate a self-sustained circadian rhythm of autophosphorylation and dephosphorylation independent of transcription and translation. This phosphorylation rhythm regulates the function of these clock components, which then facilitate rhythmic gene transcription, including negative feedback on their own genes. In this article, we briefly present the mechanism of clock function in cyanobacteria. We then discuss in detail the contribution of transcriptional feedback and protein phosphorylation to various functional aspects of the circadian clock of Neurospora crassa. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://genesdev.cshlp.org/content/20/9/1061.full.pdf |
| Alternate Webpage(s) | http://ifc.unam.mx/curso_ritmos/capitulo5/neurospora_cyanobacteria.pdf |
| PubMed reference number | 16651653v1 |
| Volume Number | 20 |
| Issue Number | 9 |
| Journal | Genes & development |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | ARNTL gene CLK1 gene Carbamoyl Phosphate Synthetase 1 Activators [MoA] Circadian Clocks Circadian Rhythms Cyanobacteria Diptera Embedding Ephrin Type-B Receptor 1, human Gene Expression Genetic Translation Process HAVCR1 protein, human Histones Neurospora sitophila Ab.IgE:ACnc:Pt:Ser:Qn Nitrates Oscillator Device Component Phosphoric Monoester Hydrolases Protein Phosphatase 2A Protein dephosphorylation Sleep Disorders, Circadian Rhythm Transcription, Genetic Transcriptional Regulation Unstable Medical Device Problem Urokinase alteplase cell growth chromatin remodeling mutant |
| Content Type | Text |
| Resource Type | Article |
