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Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments
Daylight vision in most mammals is mediated predominantly by a middle/long wavelength-sensitive (M/LWS) pigment. Although spectral sensitivity and associated shifts in M/LWS are mainly determined by five critical sites, predicted phenotypic variation is rarely validated, and its ecological significa...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7165416/ https://www.ncbi.nlm.nih.gov/pubmed/32241894 http://dx.doi.org/10.1073/pnas.2002235117 |
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author | Chi, Hai Cui, Yimeng Rossiter, Stephen J. Liu, Yang |
author_facet | Chi, Hai Cui, Yimeng Rossiter, Stephen J. Liu, Yang |
author_sort | Chi, Hai |
collection | PubMed |
description | Daylight vision in most mammals is mediated predominantly by a middle/long wavelength-sensitive (M/LWS) pigment. Although spectral sensitivity and associated shifts in M/LWS are mainly determined by five critical sites, predicted phenotypic variation is rarely validated, and its ecological significance is unclear. We experimentally determine spectral tuning of M/LWS pigments and show that two highly divergent taxa, the gerbil and the elephant-shrew, have undergone independent dramatic blue-green shifts to 490 nm. By generating mutant proteins, we identify additional critical sites contributing to these shifts. Our results, which extend the known range of spectral tuning of vertebrate M/LWS, provide a compelling case of functional convergence, likely related to parallel adaptive shifts from nocturnal to brighter light conditions in similar habitats. |
format | Online Article Text |
id | pubmed-7165416 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-71654162020-04-23 Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments Chi, Hai Cui, Yimeng Rossiter, Stephen J. Liu, Yang Proc Natl Acad Sci U S A Biological Sciences Daylight vision in most mammals is mediated predominantly by a middle/long wavelength-sensitive (M/LWS) pigment. Although spectral sensitivity and associated shifts in M/LWS are mainly determined by five critical sites, predicted phenotypic variation is rarely validated, and its ecological significance is unclear. We experimentally determine spectral tuning of M/LWS pigments and show that two highly divergent taxa, the gerbil and the elephant-shrew, have undergone independent dramatic blue-green shifts to 490 nm. By generating mutant proteins, we identify additional critical sites contributing to these shifts. Our results, which extend the known range of spectral tuning of vertebrate M/LWS, provide a compelling case of functional convergence, likely related to parallel adaptive shifts from nocturnal to brighter light conditions in similar habitats. National Academy of Sciences 2020-04-14 2020-04-02 /pmc/articles/PMC7165416/ /pubmed/32241894 http://dx.doi.org/10.1073/pnas.2002235117 Text en Copyright © 2020 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
spellingShingle | Biological Sciences Chi, Hai Cui, Yimeng Rossiter, Stephen J. Liu, Yang Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments |
title | Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments |
title_full | Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments |
title_fullStr | Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments |
title_full_unstemmed | Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments |
title_short | Convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate M/LWS pigments |
title_sort | convergent spectral shifts to blue-green vision in mammals extends the known sensitivity of vertebrate m/lws pigments |
topic | Biological Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7165416/ https://www.ncbi.nlm.nih.gov/pubmed/32241894 http://dx.doi.org/10.1073/pnas.2002235117 |
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