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Neuropsin (OPN5): A Non-visual UV Sensitive Photoreceptor Gene Expression Pattern Among Mega and Micro Bats

Received: 20 January 2022    Accepted: 11 February 2022    Published: 19 February 2022
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Abstract

Bats are nocturnal animals with functional eyes and M/L and S opsin genes in the majority of the species. These genes are prerequisite for daylight, UV and dichromatic colour vision. Several studies suggest that other non-visual light-sensitive pigments are also involved in the UV light perception in animals. Recent behavioural, molecular and immunohistochemical evidence supports that the opsin-like gene, neuropsin (OPN5), is identified in humans, mice and birds, where it serves as a G protein-coupled UV-sensitive photoreceptor. Based on its low sequence homology with other opsin groups, OPN5 is classified as an independent group. While the roles of non-visual light-sensitive pigment OPN5 in bats remain an open question, here we report that bat’s neuropsin (OPN5) encoded by OPN5 gene shares 89-96% amino acid identity and similar domain organization with human and mouse OPN5. By PCR amplification, we confirm that all the mega and micro bats express the OPN5 gene in their genome. The expression of OPN5 is detectable only in the brain, eye and retina and not in the heart, kidney, liver, lungs and testis. This result suggests that OPN5 gene expression is neural specific in bats. OPN5 gene expression level is significantly higher in tree-roosting bats compared to cave-roosting bats. Since, the tree-roosting bats received slightly more sunlight every day when compared to cave-roosting bats. In captive conditions, the expression levels of OPN5 in the neural tissues are significantly lower than those of wild bats. Our preliminary results suggest that the opsin-like gene, neuropsin (OPN5) is involved in UV light perception in bats.

Published in International Journal of Genetics and Genomics (Volume 10, Issue 1)
DOI 10.11648/j.ijgg.20221001.14
Page(s) 21-31
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Bats, UV-vision, Opsin Genes, Non-visual Pigments, Neuropsin (OPN5)

References
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Cite This Article
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    Steffi Christiane Ramesh, Subbian Baskaran, Uthandakalaipandian Ramesh, Thangavel Karuppudurai. (2022). Neuropsin (OPN5): A Non-visual UV Sensitive Photoreceptor Gene Expression Pattern Among Mega and Micro Bats. International Journal of Genetics and Genomics, 10(1), 21-31. https://doi.org/10.11648/j.ijgg.20221001.14

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    ACS Style

    Steffi Christiane Ramesh; Subbian Baskaran; Uthandakalaipandian Ramesh; Thangavel Karuppudurai. Neuropsin (OPN5): A Non-visual UV Sensitive Photoreceptor Gene Expression Pattern Among Mega and Micro Bats. Int. J. Genet. Genomics 2022, 10(1), 21-31. doi: 10.11648/j.ijgg.20221001.14

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    AMA Style

    Steffi Christiane Ramesh, Subbian Baskaran, Uthandakalaipandian Ramesh, Thangavel Karuppudurai. Neuropsin (OPN5): A Non-visual UV Sensitive Photoreceptor Gene Expression Pattern Among Mega and Micro Bats. Int J Genet Genomics. 2022;10(1):21-31. doi: 10.11648/j.ijgg.20221001.14

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  • @article{10.11648/j.ijgg.20221001.14,
      author = {Steffi Christiane Ramesh and Subbian Baskaran and Uthandakalaipandian Ramesh and Thangavel Karuppudurai},
      title = {Neuropsin (OPN5): A Non-visual UV Sensitive Photoreceptor Gene Expression Pattern Among Mega and Micro Bats},
      journal = {International Journal of Genetics and Genomics},
      volume = {10},
      number = {1},
      pages = {21-31},
      doi = {10.11648/j.ijgg.20221001.14},
      url = {https://doi.org/10.11648/j.ijgg.20221001.14},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijgg.20221001.14},
      abstract = {Bats are nocturnal animals with functional eyes and M/L and S opsin genes in the majority of the species. These genes are prerequisite for daylight, UV and dichromatic colour vision. Several studies suggest that other non-visual light-sensitive pigments are also involved in the UV light perception in animals. Recent behavioural, molecular and immunohistochemical evidence supports that the opsin-like gene, neuropsin (OPN5), is identified in humans, mice and birds, where it serves as a G protein-coupled UV-sensitive photoreceptor. Based on its low sequence homology with other opsin groups, OPN5 is classified as an independent group. While the roles of non-visual light-sensitive pigment OPN5 in bats remain an open question, here we report that bat’s neuropsin (OPN5) encoded by OPN5 gene shares 89-96% amino acid identity and similar domain organization with human and mouse OPN5. By PCR amplification, we confirm that all the mega and micro bats express the OPN5 gene in their genome. The expression of OPN5 is detectable only in the brain, eye and retina and not in the heart, kidney, liver, lungs and testis. This result suggests that OPN5 gene expression is neural specific in bats. OPN5 gene expression level is significantly higher in tree-roosting bats compared to cave-roosting bats. Since, the tree-roosting bats received slightly more sunlight every day when compared to cave-roosting bats. In captive conditions, the expression levels of OPN5 in the neural tissues are significantly lower than those of wild bats. Our preliminary results suggest that the opsin-like gene, neuropsin (OPN5) is involved in UV light perception in bats.},
     year = {2022}
    }
    

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  • TY  - JOUR
    T1  - Neuropsin (OPN5): A Non-visual UV Sensitive Photoreceptor Gene Expression Pattern Among Mega and Micro Bats
    AU  - Steffi Christiane Ramesh
    AU  - Subbian Baskaran
    AU  - Uthandakalaipandian Ramesh
    AU  - Thangavel Karuppudurai
    Y1  - 2022/02/19
    PY  - 2022
    N1  - https://doi.org/10.11648/j.ijgg.20221001.14
    DO  - 10.11648/j.ijgg.20221001.14
    T2  - International Journal of Genetics and Genomics
    JF  - International Journal of Genetics and Genomics
    JO  - International Journal of Genetics and Genomics
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    EP  - 31
    PB  - Science Publishing Group
    SN  - 2376-7359
    UR  - https://doi.org/10.11648/j.ijgg.20221001.14
    AB  - Bats are nocturnal animals with functional eyes and M/L and S opsin genes in the majority of the species. These genes are prerequisite for daylight, UV and dichromatic colour vision. Several studies suggest that other non-visual light-sensitive pigments are also involved in the UV light perception in animals. Recent behavioural, molecular and immunohistochemical evidence supports that the opsin-like gene, neuropsin (OPN5), is identified in humans, mice and birds, where it serves as a G protein-coupled UV-sensitive photoreceptor. Based on its low sequence homology with other opsin groups, OPN5 is classified as an independent group. While the roles of non-visual light-sensitive pigment OPN5 in bats remain an open question, here we report that bat’s neuropsin (OPN5) encoded by OPN5 gene shares 89-96% amino acid identity and similar domain organization with human and mouse OPN5. By PCR amplification, we confirm that all the mega and micro bats express the OPN5 gene in their genome. The expression of OPN5 is detectable only in the brain, eye and retina and not in the heart, kidney, liver, lungs and testis. This result suggests that OPN5 gene expression is neural specific in bats. OPN5 gene expression level is significantly higher in tree-roosting bats compared to cave-roosting bats. Since, the tree-roosting bats received slightly more sunlight every day when compared to cave-roosting bats. In captive conditions, the expression levels of OPN5 in the neural tissues are significantly lower than those of wild bats. Our preliminary results suggest that the opsin-like gene, neuropsin (OPN5) is involved in UV light perception in bats.
    VL  - 10
    IS  - 1
    ER  - 

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Author Information
  • Department of Animal Behaviour & Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India

  • Department of Animal Behaviour & Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India

  • Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India

  • Department of Animal Behaviour & Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai, India

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