2013 Fiscal Year Final Research Report
Mechanisms to detoxify hydrogen sulfide using special amino acids in deep-sea organisms
| Project/Area Number |
22380107
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | The University of Tokyo |
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Principal Investigator |
INOUE Koji 東京大学, 大気海洋研究所, 准教授 (60323630)
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| Co-Investigator(Renkei-kenkyūsha) |
TOYOHARA Haruhiko 京都大学, 農学研究科, 准教授 (90183079)
MARUYAMA Tadashi 独立行政法人海洋研究開発機構, 海洋・極限環境生物圏領域, プログラムディレクター (90373464)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Keywords | 適応 / 特殊環境 / 深海 / 熱水噴出域 / 硫化水素 / 生理学 / 共生 / 無脊椎動物 |
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| Research Abstract |
We studied the adaptation mechanisms to toxic hydrogen sulfide in deep-sea hydrothermal vent-specific animals through the analysis of the synthetic pathway of hypotaurine, which is a precursor of taurine and can bind to hydrogen sulfide and generate non-toxic thiotaurine. We identified the hypotaurine synthesis pathway, which has not been reported in any marine invertebrates, in the deep-sea mussel Bathymodiolus septemdierum. We also revealed that the genes of the enzymes involved in the hypotaurine synthesis actively expressed in the gill regardless of the sulfide concentration in the rearing water. We also analyzed the free amino acids including hypotaurine and its precursors to confirm the activity of the pathway. Bivalves may have acquired the habitat of hydrothermal vent area by utilizing a part of the taurine synthesis pathway.
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[Journal Article] Influence of water temperature on the larval development of Neoverruca sp. and Ashinkailepas seepiophila - implications for larval dispersal and settlement in the vent and seep environments2013
Author(s)
Yorusue, T., Kado, R., Watanabe, H., Høeg, J.T., Inoue, K., Kojima, S., Chan, B.K.K.
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Journal Title
Deep-Sea Res
Volume: 71
Pages: 33-37
DOI
Peer Reviewed
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[Journal Article] Comparison of the amount of thiotrophic symbionts in the deep-sea mussel Bathymodiolus septemdierum under different sulfide levels by using fluorescent in situ hybridization2012
Author(s)
Fujinoki, M., Koito, T., Nemoto, S., Kitada, M., Yamaguchi, Y., Hyodo, S., Numanami, H., Miyazaki, N., and Inoue, K.
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Journal Title
Fish. Sci
Volume: 78
Pages: 139-146
DOI
Peer Reviewed
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[Journal Article] Whole-mount fluorescence in situ hybridization to visualize symbiotic bacteria in the gills of deep-sea mussels2012
Author(s)
Fujinoki, M., Koito, T., Fujiwara, Y., Kawato M., Tada, Y., Hamasaki, K., Jimbo, M., and Inoue, K.
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Journal Title
Aquatic Biol
Volume: 14
Pages: 134-140
DOI
Peer Reviewed
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[Journal Article] New distribution record of deep-sea mussel, Bathymodiolus aduloides Hashimoto & Okutani 1994 [Mollusca : Bivalvia: Mytilidae] from a hydrothermal vent, Myojinsho2012
Author(s)
Koito, T., Hashimoto, J., Nemoto, S., Kitajima, M., Kitada, M., Inoue, K.
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Journal Title
Marine Biodiversity Records
Volume: 5
Pages: e38
DOI
Peer Reviewed
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[Journal Article] Nematode community composition in hydrothermal vent and adjacent non-vent fields around Myojin Knoll, a seamount on the Izu-Ogasawara Arc in the western North Pacific Ocean
Author(s)
Setoguchi, Y., Nomaki, H., Kitahashi, T., Watanabe, H., Inoue, K., Ogawa, NO, Shimanaga, M.
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Journal Title
Mar. Biol
Volume: (in press)
DOI
Peer Reviewed
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