An ultraviolet (UV-A) absorbing biopterin glucoside from the marine planktonic cyanobacterium Oscillatoria sp. |
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| Authors: | Tadashi Matsunaga J Grant Burgess Noriko Yamada Kazuo Komatsu Seeichi Yoshida Youji Wachi |
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| Institution: | (1) Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, 184 Tokyo, Japan;(2) Research and Development Headquarters, Shiseido Research Center, Kohoku-ku, Yokohama, Japan |
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| Abstract: | We have investigated the physiological response of marine planktonic cyanobacteria to UV-A (320–390 nm) irradiation. Here, we report the isolation of a UV-A absorbing pigment from a UV-A resistant strain of Oscillatoria. This pigment has been purified, and its structure determined to be biopterin glucoside (BG), a compound chemically related to the pteridine pigments found in butterfly wings. A UV-A sensitive isolate did not produce significant levels of this chromophore. UV-A radiation was very effective in eliciting synthesis of BG. In addition, increased UV-A radiation, increased intracellular levels of BG. These data suggest that BG may protect the cyanobacterium from adverse effects of UV-A radiation.
Correspondence to: T. Matsunaga |
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