The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
Origin and evolution of circadian clock genes in prokaryotes
Open accessAbstract
Regulation of physiological functions with approximate daily periodicity, or circadian rhythms, is a characteristic feature of eukaryotes. Until recently, cyanobacteria were the only prokaryotes reported to possess circadian rhythmicity. It is controlled by a cluster of three genes: kaiA , kaiB , and kaiC . Using sequence data of ≈70 complete prokaryotic genomes from the various public depositories, we show here that the kai genes and their homologs have quite a different evolutionary history and occur in Archaea and Proteobacteria as well. Among the three genes, kaiC is evolutionarily the oldest, and kaiA is the youngest and likely evolved only in cyanobacteria. Our data suggest that the prokaryotic circadian pacemakers have evolved in parallel with the geological history of the earth, and that natural selection, multiple lateral transfers, and gene duplications and losses have been the major factors shaping their evolution.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Kimura, M. (1980) · Journal of Molecular Evolution · doi:10.1007/bf01731581 · Cited by 29,778
Whelan, S., & Goldman, N. (2001) · Molecular Biology and Evolution · doi:10.1093/oxfordjournals.molbev.a003851 · Cited by 2,849
Quartet Puzzling: A Quartet Maximum-Likelihood Method for Reconstructing Tree Topologies
Strimmer, K., & von Haeseler, A. (1996) · Molecular Biology and Evolution · doi:10.1093/oxfordjournals.molbev.a025664 · Cited by 2,531
Estimation of primate speciation dates using local molecular clocks.
Yoder, A. D., & Yang, Z. (2000) · Molecular Biology and Evolution · doi:10.1093/oxfordjournals.molbev.a026389 · Cited by 494
Cited by
The role of the gut microbiota in NAFLD
Leung, C., Rivera, L., Furness, J. B., & Angus, P. W. (2016) · Nature Reviews Gastroenterology & Hepatology · doi:10.1038/nrgastro.2016.85 · Cited by 1,020
Circadian disorganization alters intestinal microbiota
Voigt, R. M., Forsyth, C. B., Green, S. J., Mutlu, E., Engen, P., Vitaterna, M. H., Turek, F. W., & Keshavarzian, A. (2014) · PLoS ONE · doi:10.1371/journal.pone.0097500 · Cited by 439
Tan, D.-X., Zheng, X., Kong, J., Manchester, L., Hardeland, R., Kim, S., Xu, X., & Reiter, R. (2014) · International Journal of Molecular Sciences · doi:10.3390/ijms150915858 · Cited by 188
Timing the day: what makes bacterial clocks tick?
Johnson, C. H., Zhao, C., Xu, Y., & Mori, T. (2017) · Nature Reviews Microbiology · doi:10.1038/nrmicro.2016.196 · Cited by 123
Mechanisms of Carbon Fixation and Engineering for Increased Carbon Fixation in Cyanobacteria
Durall, C., & Lindblad, P. (2015) · Algal Research · doi:10.1016/j.algal.2015.07.002 · Cited by 76
Metadata
- Authors
- Dvornyk, V., Vinogradova, O., & Nevo, E.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2003-02-25
- Volume
- 100
- Issue
- 5
- Pages
- 2495-2500
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2074937753
- Cited by
- 271
- References
- 4
- FWCI
- 4.20
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Origin and evolution of circadian clock genes in prokaryotes. https://app.cochat.ai/papers/10.1073/pnas.0130099100
- The paper
- Dvornyk, V., Vinogradova, O., & Nevo, E. (2003). Origin and evolution of circadian clock genes in prokaryotes. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0130099100
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.