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Novel glycosylated mycosporine-like amino acids with radical scavenging activity from the cyanobacterium Nostoc commune

Paper ID Volume ID Publish Year Pages File Format Full-Text
30777 44502 2011 9 PDF Available
Title
Novel glycosylated mycosporine-like amino acids with radical scavenging activity from the cyanobacterium Nostoc commune
Abstract

Mycosporine-like amino acids (MAAs) are UV absorbing pigments, and structurally distinct MAAs have been identified in taxonomically diverse organisms. Two novel MAAs were purified from the cyanobacterium Nostoc commune, and their chemical structures were characterized. An MAA with an absorption maximum at 335 nm was identified as a pentose-bound porphyra-334 derivative with a molecular mass of 478 Da. Another identified MAA had double absorption maxima at 312 and 340 nm and a molecular mass of 1050 Da. Its unique structure consisted of two distinct chromophores of 3-aminocyclohexen-1-one and 1,3-diaminocyclohexen and two pentose and hexose sugars. These MAAs had radical scavenging activity in vitro; the 1050-Da MAA contributed approximately 27% of the total radical scavenging activities in a water extract of N. commune. These results suggest that these glycosylated MAAs have multiple roles as a UV protectant and an antioxidant relevant to anhydrobiosis in N. commune.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Two novel glycosylated MAAs were found in Nostoc commune. ► The 478-Da MAA was identified as a pentose-bound porphyra-334 derivative. ► The 1050-Da MAA consisted of two distinct chromophores, pentose and hexose. ► These MAAs had radical scavenging activity.

Keywords
Anhydrobiosis; Antioxidant; Glycosylation; Porphyra-334; UV protectant
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Novel glycosylated mycosporine-like amino acids with radical scavenging activity from the cyanobacterium Nostoc commune
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 105, Issue 1, 5 October 2011, Pages 81–89
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us