Opsins mediate light detection in most animals, and understanding their evolution is key to clarify the origin of vision. Despite the public availability of a substantial collection of well-characterized opsins, early opsin evolution has yet to be fully understood, in large part because of the high level of divergence observed among opsins belonging to different subfamilies. As a result, different studies have investigated deep opsin evolution using alternative data sets and reached contradictory results. Here, we integrated the data and methods of three, key, recent studies to further clarify opsin evolution. We show that the opsin relationships are sensitive to outgroup choice; we generate new support for the existence of Rhabdomeric opsins in Cnidaria (e.g., corals and jellyfishes) and show that all comb jelly opsins belong to well-recognized opsin groups (the Go-coupled opsins or the Ciliary opsins), which are also known in Bilateria (e.g., humans, fruit flies, snails, and their allies) and Cnidaria. Our results are most parsimoniously interpreted assuming a traditional animal phylogeny where Ctenophora are not the sister group of all the other animals.

Feuda, R.; Rota Stabelli, O.; Oakley, T.H.; Pisani, D. (2014). The comb jelly opsins and the origins of animal phototransduction. GENOME BIOLOGY AND EVOLUTION, 6 (8): 1964-1971. doi: 10.1093/gbe/evu154 handle: http://hdl.handle.net/10449/33227

The comb jelly opsins and the origins of animal phototransduction

Rota Stabelli, Omar;
2014-01-01

Abstract

Opsins mediate light detection in most animals, and understanding their evolution is key to clarify the origin of vision. Despite the public availability of a substantial collection of well-characterized opsins, early opsin evolution has yet to be fully understood, in large part because of the high level of divergence observed among opsins belonging to different subfamilies. As a result, different studies have investigated deep opsin evolution using alternative data sets and reached contradictory results. Here, we integrated the data and methods of three, key, recent studies to further clarify opsin evolution. We show that the opsin relationships are sensitive to outgroup choice; we generate new support for the existence of Rhabdomeric opsins in Cnidaria (e.g., corals and jellyfishes) and show that all comb jelly opsins belong to well-recognized opsin groups (the Go-coupled opsins or the Ciliary opsins), which are also known in Bilateria (e.g., humans, fruit flies, snails, and their allies) and Cnidaria. Our results are most parsimoniously interpreted assuming a traditional animal phylogeny where Ctenophora are not the sister group of all the other animals.
Settore BIO/05 - ZOOLOGIA
2014
Feuda, R.; Rota Stabelli, O.; Oakley, T.H.; Pisani, D. (2014). The comb jelly opsins and the origins of animal phototransduction. GENOME BIOLOGY AND EVOLUTION, 6 (8): 1964-1971. doi: 10.1093/gbe/evu154 handle: http://hdl.handle.net/10449/33227
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/33227
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