Ciliary photoreceptors with a vertebrate-type opsin in an invertebrate brain
| Autor: | Heidi Snyman, Joachim Wittbrodt, Detlev Arendt, Kristin Tessmar-Raible, Adriaan Dorresteijn |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Most recent common ancestor
Retinal Ganglion Cells Cell type Opsin Evolution of the eye genetic structures media_common.quotation_subject Molecular Sequence Data Zoology Insect Biology Eye biology.animal Gene Duplication medicine Animals Photopigment Amino Acid Sequence Cilia Cloning Molecular Conserved Sequence Phylogeny media_common Retina Multidisciplinary Cilium Genes Homeobox Rod Opsins Vertebrate Brain Polychaeta biology.organism_classification Biological Evolution eye diseases Cell biology Circadian Rhythm medicine.anatomical_structure Rhodopsin biology.protein Photoreceptor Cells Invertebrate sense organs Platynereis Photoreceptor Cells Vertebrate |
| Zdroj: | Science (New York, N.Y.). 306(5697) |
| ISSN: | 1095-9203 |
| Popis: | For vision, insect and vertebrate eyes use rhabdomeric and ciliary photoreceptor cells, respectively. These cells show distinct architecture and transduce the light signal by different phototransductory cascades. In the marine rag-worm Platynereis , we find both cell types: rhabdomeric photoreceptor cells in the eyes and ciliary photoreceptor cells in the brain. The latter use a photopigment closely related to vertebrate rod and cone opsins. Comparative analysis indicates that both types of photoreceptors, with distinct opsins, coexisted in Urbilateria, the last common ancestor of insects and vertebrates, and sheds new light on vertebrate eye evolution. |
| Databáze: | OpenAIRE |
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