Glycosylated porphyra-334 and palythine-threonine from the terrestrial cyanobacterium nostoc commune

フォーマット:

論文

責任表示:

Nazifi, Ehsan ; Wada, Naoki ; Yamaba, Minami ; Asano, Tomoya ; Nishiuchi, Takumi ; Matsugo, Seiichi ; Sakamoto, Toshio

言語:

英語

出版情報:

Ocean University of China, MDPI, 2013-01-01

著者名:

Nazifi, Ehsan

Wada, Naoki

Yamaba, Minami

Asano, Tomoya

Nishiuchi, Takumi

Matsugo, Seiichi

Sakamoto, Toshio

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掲載情報:

Marine Drugs

ISSN:

1660-3397      

巻:

11

通号:

9

開始ページ:

3124

終了ページ:

3154

バージョン:

publisher

概要:

Mycosporine-like amino acids (MAAs) are water-soluble UV-absorbing pigments, and structurally different MAAs have been identified in eukaryotic algae and cyanobacteria. In this study novel glycosylated MAAs were found in the terrestrial cyanobacterium Nostoc commune (N. commune). An MAA with an absorption maximum at 334 nm was identified as a hexose-bound porphyra-334 derivative with a molecular mass of 508 Da. Another MAA with an absorption … maximum at 322 nm was identified as a two hexose-bound palythine-threonine derivative with a molecular mass of 612 Da. These purified MAAs have radical scavenging activities in vitro, which suggests multifunctional roles as sunscreens and antioxidants. The 612-Da MAA accounted for approximately 60% of the total MAAs and contributed approximately 20% of the total radical scavenging activities in a water extract, indicating that it is the major water-soluble UV-protectant and radical scavenger component. The hexose-bound porphyra-334 derivative and the glycosylated palythine-threonine derivatives were found in a specific genotype of N. commune, suggesting that glycosylated MAA patterns could be a chemotaxonomic marker for the characterization of the morphologically indistinguishable N. commune. The glycosylation of porphyra-334 and palythine-threonine in N. commune suggests a unique adaptation for terrestrial environments that are drastically fluctuating in comparison to stable aquatic environments. © 2013 by the authors. 続きを見る

URL:

http://hdl.handle.net/2297/36264