A recessive mutant of Drosophila Clock reveals a role in circadian rhythm amplitude
| Autor: | Namrata Nandakumar, Sebastian Kadener, Michael Rosbash, Ravi Allada |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
CLOCK Proteins
Genes Recessive Biology General Biochemistry Genetics and Molecular Biology Animals Drosophila Proteins Circadian rhythm RNA Messenger Allele Molecular Biology Transcription factor Gene Alleles DNA Primers Genetics Splice site mutation General Immunology and Microbiology Base Sequence Behavior Animal General Neuroscience Articles Circadian Rhythm Phenotype RNA splicing Mutation Drosophila Drosophila Protein Transcription Factors |
| Popis: | The transcription factor Clock (Clk) plays a critical role in animal circadian rhythms. Genetic studies defining its function have relied on two dominant negative alleles, one in Drosophila and one in mice. Here we describe a novel recessive allele of Drosophila Clock, Clk(ar). Homozygous Clk(ar) flies are viable and behaviorally arrhythmic. The Clk(ar) phenotype is caused by a splice site mutation that severely disrupts splicing and reduces Clk activity. Despite the behavioral arrhythmicity, molecular oscillations are still detectable in Clk(ar) flies. Transcription analysis indicates potent effects of Clk(ar) on levels and amplitude of transcriptional oscillations. Taken together with other data, we propose that Clk makes a major contribution to the strength and amplitude of circadian rhythms. |
| Databáze: | OpenAIRE |
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