國家衛生研究院 NHRI:Item 3990099045/11578
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    題名: The cone opsin repertoire of osteoglossomorph fishes: Gene loss in mormyrid electric fish and a long wave-length sensitive cone opsin that survived 3R
    作者: Liu, DW;Wang, FY;Lin, JJ;Thompson, A;Lu, Y;Vo, D;Yan, HY;Zakon, H
    貢獻者: Institute of Molecular and Genomic Medicine
    摘要: Vertebrates have four classes of cone opsin genes derived from two rounds of genome duplication. These are short wavelength sensitive 1 (SWS1), short wavelength-sensitive 2 (SWS2), medium wavelength-sensitive (RH2), and long wavelength-sensitive (LWS). Teleosts had another genome duplication at their origin and it is believed that only one of each cone opsin survived the ancestral teleost duplication event. We tested this by examining the retinal cones of a basal teleost group, the osteoglossomorphs. Surprisingly, this lineage has lost the typical vertebrate green-sensitive RH2 opsin gene and, instead, has a duplicate of the LWS opsin that is green-sensitive. This parallels the situation in mammalian evolution in which the RH2 opsin gene was lost in basal mammals and a green-sensitive opsin re-evolved in Old World, and independently in some New World, primates from an LWS opsin gene. Another group of fish, the characins, possess green-sensitive LWS cones. Phylogenetic analysis shows that the evolution of green-sensitive LWS opsins in these two teleost groups derives from a common ancestral LWS opsin that acquired green-sensitivity. Additionally, the nocturnally-active African weakly electric fish (Mormyroideae), which are osteoglossomorphs, show a loss of the SWS1 opsin gene. In comparison with the independently evolved nocturnally-active South American weakly electric fish (Gymnotiformes) with a functionally monochromatic LWS opsin cone retina, the presence of SWS2, LWS, and LWS2 cone opsins in mormyrids suggests the possibility of color vision.
    日期: 2019-03
    關聯: Molecular Biology and Evolution. 2019 Mar;36(3):447-457.
    Link to: http://dx.doi.org/10.1093/molbev/msy241
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0737-4038&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000462585100002
    Cited Times(Scopus): https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85062193623
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