Cited by 198Receptor Mechanisms and SignalingPhotoreceptor and optogenetics researchRetinal Development and Disorders

A novel Go-mediated phototransduction cascade in scallop visual cells

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Kojima, Daisuke, Terakita, Akihisa, Ishikawa, Toru, Tsukahara, Yasuo, Maeda, Akio, Shichida, Yoshinori·1997·Journal of Biological Chemistry

Abstract

Scallop retinas contain ciliary photoreceptor cells that respond to light by hyperpolarization like vertebrate rods and cones, but the response is generated by a different phototransduction cascade from those of rods and cones. To elucidate the cascade, we investigated a visual pigment and a G-protein functioning in the hyperpolarizing cell. Sequencing of cDNAs and in situ hybridization experiments showed that the hyperpolarizing cells express a novel subtype of visual pigment, which showed significant differences in amino acid sequence from other visual pigments. Cloning cDNA genes of G-protein and immunohistochemical analysis revealed the presence of an alpha subunit of a Go type G-protein, 83% identical in amino acid sequence to mammalian Go(alpha) in the nervous system, in the photoreceptive region of the cells. The results demonstrate that a novel, Go-mediated, phototransduction cascade is present in the hyperpolarizing cells. The phototransduction cascade in the scallop hyperpolarizing cell provides an alternative system to investigate Go-mediated transduction pathways in the nervous system. Molecular phylogenetic analysis strongly suggests that the Go-mediated phototransduction system emerged before the divergence of animals into vertebrate and invertebrate in the course of evolution.

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  • Sp-Opsin3.1 and Sp-Opsin3.2 form a well-supported group with the Patinopecten G_o-Opsin and two Amphioxus Opsins.

    “Strikingly, two Opsins, Sp-Opsin3.1 and Sp-Opsin3.2,form one well-supported group with the Patinopecten G o -Opsin (Kojima et al., 1997) and two Opsins from Amphioxus (Koyanagi et al., 2002) (Fig. 1A)”

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Research works printed but not linked: 2

  1. Adachi, J., and Hasegawa, M. (1996) MOLPHY: Program for Molecular Phylogenetics, Version 2.3, Institute of Statistical Mathematics, Tokyo 19. Ko ¨nig, B., Arendt, A., McDowell, J. H., Kahlert, M., Hargrave, P. A., and Hofmann, K. P. (1989) Proc. Natl. Acad. Sci. U. S. A. 86, 6878 -6882
  2. Worley, P. F., Baraban, J. M., Van Dop, C., Neer, E. J., and Snyder, S. H. (1986) Proc. Natl. Acad. Sci. U. S. A. 83, 4561-4565

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Authors
Kojima, D., Terakita, A., Ishikawa, T., Tsukahara, Y., Maeda, A., & Shichida, Y.
Affiliations
  • Kyoto University (JP)
  • RIKEN (JP)
Corresponding author
Shichida, Yoshinori
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1997-09
Volume
272
Issue
37
Pages
22979-22982
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1998748342
Cited by
198
References
27
Citations by year
2026: 5 · 2025: 3 · 2024: 13 · 2023: 10 · 2022: 7 · 2021: 7 · 2020: 5 · 2019: 15 · 2018: 8 · 2017: 5 · 2016: 5 · 2015: 8 · 2014: 5 · 2013: 8 · 2012: 2
FWCI
2.01
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Photoreceptor and optogenetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
phototransduction, Go protein, G protein alpha subunit, visual pigments, molecular phylogeny
MeSH terms
Amino Acid Sequence, Animals, Eye Proteins, Membrane Proteins, Molecular Sequence Data, Mollusca, Retina, Species Specificity, Tissue Distribution, Vision, Ocular, Sequence Homology, Amino Acid, In Situ Hybridization, Sequence Analysis, DNA, Photoreceptor Cells, Invertebrate, DNA, Complementary, Evolution, Molecular

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