Retina-Type Rhodopsin Gene Expressed in the Brain of a Teleost, Ayu (Plecoglossus altivelis)(Reproductive Biology)
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概要
- 論文の詳細を見る
Ayu (Plecoglossus altivelis) is a teleost whose gonadal development is stimulated by shortened daylength and is a useful model to study the mechanism of photoperiodism. However, localization and characteristics of the photoreceptor that mediates photoperiodism in gonadal development remain to be determined. To identify the photoreceptive molecule that regulates photoperiodic responses, in the present study, we have cloned and characterized the cDNA encoding an opsin gene expressed in the ayu brain, a putative site of the photoreceptor for photoperiodism. The identified opsin was rhodopsin that is identical to the rhodopsin expressed in the retina. Phylogenetic analysis demonstrated that this rhodopsin belongs to the retina-type but not to the pineal-specific rhodopsin group. Genomic polymerase chain reaction (PCR) demonstrated that the ayu rhodopsin gene is intron-less. Southern and Northern blots and reverse-transcription PCR analyses indicate that the same rhodopsin gene is expressed in the retina and the brain but not in the pineal organ of ayu. These results indicate that the rhodospin gene is expressed in the retina and brain and mediates not only visual but also nonvisual functions such as photoperiodism and entrainment of the circadian clock.
- 2003-08-25
著者
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IIGO Masayuki
Department of Applied Biochemical Science, Faculty of Agriculture, Utsunomiya University
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AIDA KATSUMI
Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Masuda Tomohiro
Department of Nephrology, Nagoya University Graduate School of Medicine
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Aida Katsumi
Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University
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Aida K
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences University Of Tok
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Iigo M
Department Of Applied Biochemistry Faculty Of Agriculture Utsunomiya University
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Iigo Masayuki
Utsunomiya Univ. Tochigi Jpn
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Ichikawa M
Mie Univ. Mie Jpn
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Iigo Masayuki
Department Of Applied Biochemistry Faculty Of Agriculture Utsunomiya University
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Iigo Masayuki
Department Of Anatomy St. Marianna University School Of Medicine
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Aida Katsumi
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Aida Katsumi
Department Of Aquatic Bioscience Graduate School Of Agricultural And Sciences The University Of Toky
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Aida Katsumi
Department Of Aquatic Biosciences Graduate School Of Agricultural And Life Sciences The University O
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Asahina K
Univ. Utrecht Utrecht Nld
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MASUDA Tomohiro
Johns Hopkins University School of Medicine
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Mizusawa Kanta
Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University
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Aida Katsumi
Laboratory Of Aquatic Animal Physiology Graduate School Of Agricultural And Life Sciences The Univer
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Mizusawa Kanta
School Of Fisheries Sciences Kitasato University
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Mizusawa Kanta
Department Of Animal Sciences Teikyo University Of Science And Technology
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Ichikawa M
Department Of Applied Biochemistry Utsunomiya University
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Aida K
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Iigo Masayuki
Department Of Biotechnology United Graduate School Of Agricultural Science Tokyo University Of Agric
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