| Literature DB >> 22688245 |
Kei Matsui1, Ehsan Nazifi, Yosuke Hirai, Naoki Wada, Seiichi Matsugo, Toshio Sakamoto.
Abstract
Scytonemin is a 544-Da hydrophobic pigment that can absorb UV-A radiation. It is present in cyanobacterial sheaths and is thought to function as a UV protectant. In this study, scytonemin was purified from the terrestrial cyanobacterium Nostoc commune, and its radical-scavenging activity was characterized. The purified scytonemin quenched an organic radical in vitro and accounted for up to 10% of the total activity of an ethanol extract of N. commune. These results suggest that the extracellular UV-absorbing pigment scytonemin has multiple roles, functioning as a UV sunscreen and an antioxidant relevant to anhydrobiosis in N. commune.Entities:
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Year: 2012 PMID: 22688245 DOI: 10.2323/jgam.58.137
Source DB: PubMed Journal: J Gen Appl Microbiol ISSN: 0022-1260 Impact factor: 1.452