2014 Fiscal Year Final Research Report
Physiological function and metabolism of D-aspartate in Sargassum fusiforme
| Project/Area Number |
24580307
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fisheries chemistry
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| Research Institution | Kitasato University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | D-アスパラギン酸 / ヒジキ |
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| Outline of Final Research Achievements |
Although only L-amino acids were thought to occur naturally, recent advances in analytical techniques have led to the identification of various free D-amino acids in eukaryotic organisms, including seaweeds. We detected high levels of D-aspartate in Sargassum fusiforme, and the functional significance of this amino acid is supported by its specific localization in the medullary layer of blades and quantitative variation due to changes in environmental conditions. We examined changes in the contents of several amino acids, including D-aspartate, in the brown alga S. fusiforme under hypoxic stress as well as their subsequent recovery from the stress. Of the amino acids examined, only D- and L-aspartate showed changes in concentrations during hypoxia in a parallel manner. These observations suggest that aspartate in S. fusiforme may be involved in anaerobic energy metabolism during the initial stages of anoxia.
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| Free Research Field |
水産化学
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