Molecular and phylogenetic analyses reveal mammalian-like clockwork in the honey bee (Apis mellifera) and shed new light on the molecular evolution of the circadian clock
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The circadian clock of the honey bee is implicated in ecologically relevant complex behaviors. These include time sensing, time-compensated sun-compass navigation, and social behaviors such as coordination of activity, dance language communication, and division of labor. The molecular underpinnings of the bee circadian clock are largely unknown. We show that clock gene structure and expression pattern in the honey bee are more similar to the mouse than to Drosophila. The honey bee genome does not encode an ortholog of Drosophila Timeless (Tim1), has only the mammalian type Cryptochrome (Cry-m), and has a single ortholog for each of the other canonical "clock genes." In foragers that typically have strong circadian rhythms, brain mRNA levels of amCry, but not amTim as in Drosophila, consistently oscillate with strong amplitude and a phase similar to amPeriod (amPer) under both light-dark and constant darkness illumination regimes. In contrast to Drosophila, the honey bee amCYC protein contains a transactivation domain and its brain transcript levels oscillate at virtually an anti-phase to amPer, as it does in the mouse. Phylogenetic analyses indicate that the basal insect lineage had both the mammalian and Drosophila types of Cry and Tim. Our results suggest that during evolution, Drosophila diverged from the ancestral insect clock and specialized in using a set of clock gene orthologs that was lost by both mammals and bees, which in turn converged and specialized in the other set. These findings illustrate a previously unappreciated diversity of insect clockwork and raise critical questions concerning the evolution and functional significance of species-specific variation in molecular clockwork.
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Three ancient bilaterian cryptochrome families have been reported in the sea urchin.
“has also been reported to contain three ancient bilaterian families of Cryptochromes (Rubin et al., 2006).”
From Opsins and clusters of sensory G-protein-coupled receptors in the sea urchin genome (2006) · cites this paper as Rubin et al., 2006
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Functional and Structural Analyses of Cryptochrome
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Flagged first, then by citations
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- Authors
- Rubin, E. B., Shemesh, Y., Cohen, M., Elgavish, S., Robertson, H. M., & Bloch, G.
- Affiliations
- Hebrew University of Jerusalem (IL)
- University of Illinois Urbana-Champaign (US)
- Venue
- Genome Research
- Publisher
- Cold Spring Harbor Laboratory
- Published
- 2006-10-25
- Volume
- 16
- Issue
- 11
- Pages
- 1352-1365
- ISSN
- 1088-9051 (ISSN-L)
- PMC
- PMC1626637
- OpenAlex
- W2114427883
- Cited by
- 257
- References
- 117
- Citations by year
- 2026: 6 · 2025: 8 · 2024: 15 · 2023: 15 · 2022: 12 · 2021: 10 · 2020: 11 · 2019: 11 · 2018: 13 · 2017: 22 · 2016: 12 · 2015: 9 · 2014: 15 · 2013: 7 · 2012: 19
- Type
- posted content
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- other-oa
- Locations
- Genome Research (publishedVersion, other-oa)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed (publishedVersion)
- HighWire Press Open Archive (submittedVersion)
- Funders
- Israel Science Foundation
- National Institutes of Health
- National Institute of Allergy and Infectious Diseases (AI56081, R01AI056081)
- Topics
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Insect and Arachnid Ecology and Behavior
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
- Keywords
- Apis mellifera, clock genes, cryptochrome, TIMELESS, period, cycles, insect circadian rhythms, foraging behavior
- MeSH terms
- Amino Acid Sequence, Animals, Bees, Brain, Circadian Rhythm, Drosophila, Molecular Sequence Data, Nuclear Proteins, Phylogeny, Species Specificity, Gene Expression, Genes, Insect, Sequence Homology, Amino Acid, Protein Structure, Tertiary, Evolution, Molecular, Insect Proteins, Amino Acid Motifs, Drosophila Proteins, Mice, Period Circadian Proteins
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 ›
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