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Expression of a Gene Cluster kaiABC as a Circadian Feedback Process in Cyanobacteria
Abstract
Cyanobacteria are the simplest organisms known to have a circadian clock. A circadian clock gene cluster kaiABC was cloned from the cyanobacterium Synechococcus. Nineteen clock mutations were mapped to the three kai genes. Promoter activities upstream of the kaiA and kaiB genes showed circadian rhythms of expression, and both kaiA and kaiBC messenger RNAs displayed circadian cycling. Inactivation of any single kai gene abolished these rhythms and reduced kaiBC -promoter activity. Continuous kaiC overexpression repressed the kaiBC promoter, whereas kaiA overexpression enhanced it. Temporal kaiC overexpression reset the phase of the rhythms. Thus, a negative feedback control of kaiC expression by KaiC generates a circadian oscillation in cyanobacteria, and KaiA sustains the oscillation by enhancing kaiC expression.
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Cites
The GTPase superfamily: conserved structure and molecular mechanism
Bourne, H. R., Sanders, D. A., & McCormick, F. (1991) · Nature · doi:10.1038/349117a0 · Cited by 3,392
Circadian oscillation of a mammalian homologue of the Drosophila period gene
Tei, H., Okamura, H., Shigeyoshi, Y., Fukuhara, C., Ozawa, R., Hirose, M., & Sakaki, Y. (1997) · Nature · doi:10.1038/39086 · Cited by 792
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Molecular Bases for Circadian Clocks
Dunlap, J. C. (1999) · Cell · doi:10.1016/s0092-8674(00)80566-8 · Cited by 2,900
Prebiotic Systems Chemistry: New Perspectives for the Origins of Life
Ruiz-Mirazo, K., Briones, C., & de la Escosura, A. (2014) · Chemical Reviews · doi:10.1021/cr2004844 · Cited by 930
Emery, P., So, W. V., Kaneko, M., Hall, J. C., & Rosbash, M. (1998) · Cell · doi:10.1016/s0092-8674(00)81637-2 · Cited by 912
Circadian rhythm disturbances in depression
Germain, A., & Kupfer, D. J. (2008) · Human Psychopharmacology: Clinical and Experimental · doi:10.1002/hup.964 · Cited by 644
Predicting multiple conformations via sequence clustering and AlphaFold2
Wayment-Steele, H. K., Ojoawo, A., Otten, R., Apitz, J. M., Pitsawong, W., Hömberger, M., Ovchinnikov, S., Colwell, L., & Kern, D. (2024) · Nature · doi:10.1038/s41586-023-06832-9 · Cited by 545
Metadata
- Authors
- Ishiura, M., Kutsuna, S., Aoki, S., Iwasaki, H., Andersson, C. R., Tanabe, A., Golden, S. S., Johnson, C. H., & Kondo, T.
- Venue
- Science
- Published
- 1998-09-04
- Volume
- 281
- Issue
- 5382
- Pages
- 1519-1523
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2038763999
- Cited by
- 769
- References
- 2
- FWCI
- 10.27
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ishiura, M., Kutsuna, S., Aoki, S., Iwasaki, H., Andersson, C. R., Tanabe, A., Golden, S. S., Johnson, C. H., & Kondo, T. (1998). Expression of a Gene Cluster kaiABC as a Circadian Feedback Process in Cyanobacteria. Science. https://doi.org/10.1126/science.281.5382.1519
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