ArticleBMC evolutionary biology2009
The chemoreceptor genes of the waterflea Daphnia pulex: many Grs but no Ors.
Article in BMC evolutionary biology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.
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57 citing papers in PubMed, 122 citations in OpenAlex.
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- Molecular bases of insect odorant receptor function: specificity and evolution.Biological reviews of the Cambridge Philosophical Society · 2026Review
- Patterns of Gene Family Evolution and Selection AcrossEcology and evolution · 2025Article
- Chemosensory-Related Genes in Marine Copepods.Marine drugs · 2022Article
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- Genomic regions associated with adaptation to predation inProceedings. Biological sciences · 2021Article
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- Single cell transcriptomes reveal expression patterns of chemoreceptor genes in olfactory sensory neurons of the Caribbean spiny lobster, Panulirus argus.BMC genomics · 2020Article
- The Genome of the Blind Soil-Dwelling and Ancestrally Wingless Dipluran Campodea augens: A Key Reference Hexapod for Studying the Emergence of Insect Innovations.Genome biology and evolution · 2020Article
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- Enormous expansion of the chemosensory gene repertoire in the omnivorous German cockroach Blattella germanica.Journal of experimental zoology. Part B, Molecular and developmental evolution · 2018Article
- The Toxicogenome of Hyalella azteca: A Model for Sediment Ecotoxicology and Evolutionary Toxicology.Environmental science & technology · 2018Article
- Comparative Genomics Reveals Thousands of Novel Chemosensory Genes and Massive Changes in Chemoreceptor Repertories across Chelicerates.Genome biology and evolution · 2018Article
- Access to the odor world: olfactory receptors and their role for signal transduction in insects.Cellular and molecular life sciences : CMLS · 2018Review
- The Two Main Olfactory Receptor Families inFrontiers in cellular neuroscience · 2018Review
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- Sensory Ecology of Predator-Induced Phenotypic Plasticity.Frontiers in behavioral neuroscience · 2018Review
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundChemoreception is vitally important for all animals, yet little is known about the genetics of chemoreception in aquatic organisms. The keystone species Daphnia pulex, a well known crustacean, is the first aquatic invertebrate to have its genome sequenced. This has allowed us the initial investigation of chemoreceptor genes in an aquatic invertebrate, and to begin the study of chemoreceptor evolution across the arthropod phylum.
resultsWe describe 58 Grs (gustatory receptors), belonging to the insect chemoreceptor superfamily, which were identified bioinformatically in the draft genome of the crustacean waterflea Daphnia pulex. No genes encoding proteins similar to the insect odorant receptors (Ors) were identified. These 58 Grs form 3 distinctive subfamilies of 37, 12, and 5 genes, as well as a highly divergent singleton (Gr58). In addition, Grs55-57 share distinctive amino acid motifs and cluster with the sugar receptors of insects, and may illuminate the origin of this distinctive subfamily. ESTs, tiling array, and PCR amplification results support 34 predicted gene models, and preliminary expression data comparing the sexes indicates potential female-biased expression for some genes.
conclusionThis repertoire of 58 chemoreceptors presumably mediates the many chemoperception abilities of waterfleas. While it is always possible that the entire Or gene lineage was lost at some point in the history of Daphnia pulex, we think it more likely that the insect Or lineage is indeed a relatively recently expanded gene lineage concomitant with the evolution of terrestriality in the insects or their hexapod ancestors.
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