13(2),17(3)-Cyclopheophorbide b enol as a catabolite of chlorophyll b in phycophagy by protists.
, Yokoyama A
, Shiratori T
, Inouye I
, Kinoshita Y
, Mizoguchi T
, Tamiaki H
Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan; Department of Environmental and Biological Chemistry, Fukui University of Technology, Fukui, Fukui 910-8505, Japan; Precursory Research for Embryonic Science and Tec
Both 13(2),17(3)-cyclopheophorbide a and b enols were produced along with ingestion of green microalgae containing chlorophylls a and b by a centrohelid protist (phycophagy). The results suggest that chlorophyll b as well as chlorophyll a were directly degraded to colored yet non-phototoxic catabolites in the protistan phycophagic process. Such a simple process by the predators makes a contrast to the much sophisticated chlorophyll degradation process of land plants and some algae, where phototoxicity of chlorophylls was cancelled through the multiple enzymatic steps resulting in colorless and non-phototoxic catabolites.
PMID: 23831061 [PubMed - as supplied by publisher]