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Vision using multiple distinct rod opsins in deep-sea fishes


Abstract

Vertebrate vision is accomplished through light-sensitive photopigments consisting of an opsin protein bound to a chromophore. In dim light, vertebrates generally rely on a single rod opsin [rhodopsin 1 (RH1)] for obtaining visual information. By inspecting 101 fish genomes, we found that three deep-sea teleost lineages have independently expanded their <jats:italic>RH1</jats:italic> gene repertoires. Among these, the silver spinyfin (<jats:italic>Diretmus argenteus</jats:italic>) stands out as having the highest number of visual opsins in vertebrates (two cone opsins and 38 rod opsins). Spinyfins express up to 14 <jats:italic>RH1</jats:italic>s (including the most blueshifted rod photopigments known), which cover the range of the residual daylight as well as the bioluminescence spectrum present in the deep sea. Our findings present molecular and functional evidence for the recurrent evolution of multiple rod opsin–based vision in vertebrates.

Abstract

Vertebrate vision is accomplished through light-sensitive photopigments consisting of an opsin protein bound to a chromophore. In dim light, vertebrates generally rely on a single rod opsin [rhodopsin 1 (RH1)] for obtaining visual information. By inspecting 101 fish genomes, we found that three deep-sea teleost lineages have independently expanded their <jats:italic>RH1</jats:italic> gene repertoires. Among these, the silver spinyfin (<jats:italic>Diretmus argenteus</jats:italic>) stands out as having the highest number of visual opsins in vertebrates (two cone opsins and 38 rod opsins). Spinyfins express up to 14 <jats:italic>RH1</jats:italic>s (including the most blueshifted rod photopigments known), which cover the range of the residual daylight as well as the bioluminescence spectrum present in the deep sea. Our findings present molecular and functional evidence for the recurrent evolution of multiple rod opsin–based vision in vertebrates.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Uncontrolled Keywords:Multidisciplinary
Language:English
Date:10 May 2019
Deposited On:16 May 2019 12:58
Last Modified:25 Sep 2019 00:35
Publisher:American Association for the Advancement of Science
ISSN:0036-8075
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1126/science.aav4632
Project Information:
  • : FunderFP7
  • : Grant ID222378
  • : Project TitleSONOPLAST - New Process and Machinery for Microparts Moulding based on Ultrasound excitation

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