| Color vision of the coelacanth (Latimeria chalumnae) and adaptive evolution of rhodopsin (RH1) and rhodopsin-like (RH2) pigments. | |
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MedLine Citation:
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PMID: 10833047 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The coelacanth, a "living fossil," lives at a depth of about 200 m near the coast of the Comoros archipelago in the Indian Ocean and receives only a narrow range of light at about 480 nm. To see the entire range of "color" the Comoran coelacanth appears to use only rod-specific RH1 and cone-specific RH2 visual pigments, with the optimum light sensitivities (lambda max) at 478 nm and 485 nm, respectively. These blue-shifted lambda max values of RH1 and RH2 pigments are fully explained by independent double amino acid replacements E122Q/A292S and E122Q/M207L, respectively. More generally, currently available mutagenesis experiments identify only 10 amino acid changes that shift the lambda max values of visual pigments more than 5 nm. Among these, D83N, E1220, M207L, and A292S are associated strongly with the adaptive blue shifts in the lambda max values of RH1 and RH2 pigments in vertebrates. |
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Authors:
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S Yokoyama |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of heredity Volume: 91 ISSN: 0022-1503 ISO Abbreviation: J. Hered. Publication Date: 2000 May-Jun |
Date Detail:
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Created Date: 2000-08-23 Completed Date: 2000-08-23 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0375373 Medline TA: J Hered Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 215-20 Citation Subset: IM; S |
Affiliation:
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Department of Biology, Syracuse University, NY 13244-1220, USA. syokoyam@mailbox.syr.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological Amino Acid Substitution Animals Color Perception / genetics* Evolution, Molecular* Fishes / genetics* Humans Models, Molecular Phylogeny Retinal Cone Photoreceptor Cells / metabolism Retinal Rod Photoreceptor Cells / metabolism Rhodopsin / chemistry, genetics* |
| Grant Support | |
ID/Acronym/Agency:
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GM-42379/GM/NIGMS NIH HHS |
| Chemical | |
Reg. No./Substance:
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9009-81-8/Rhodopsin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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