RRC ID 59259
著者 Ikehara T, Kuniyoshi K, Yamaguchi H, Tanabe Y, Sano T, Yoshimoto M, Oshiro N, Nakashima S, Yasumoto-Hirose M.
タイトル First Report of Microcystis Strains Producing MC-FR and -WR Toxins in Japan.
ジャーナル Toxins (Basel)
Abstract Microcystins (MCs) are a group of cyclic heptapeptide hepatotoxins produced by Microcystis and several other genera of cyanobacteria. Many structural variants have been characterized using various methods such as liquid chromatography-mass spectrometry (LC-MS) analysis, enzyme-linked immunosorbent assay (ELISA) and protein phosphatase 2A (PP2A) inhibition assay. The representative MC, MC-LR, and related cyanobacterial toxins strongly inhibit PP2A activity and can therefore be assayed by measuring the extent of PP2A inhibition. However, these methods require reference toxin standards for the quantification and identification of known MCs. To obtain various MC-producing cyanobacterial strains, we surveyed and collected MC-producing cyanobacteria from environmental sources of water in Okinawa, Japan. Using a dual assay (LC-MS analysis and PP2A inhibition assay), we identified and isolated Microcystis strains producing five MC variants (MC-LR, -RR, -LA, -FR and -WR). Approximately 4 mg of MC-WR and -FR toxins were purified from the laboratory culture of the Microcystis isolate NIES-4344. Pure MC-WR and -FR variants were prepared for future use as toxin standards in LC-MS analysis. Phylogenetic analysis based on ftsZ revealed that the NIES-4344 strain belongs to the identified groups in Microcystis aeruginosa. This is the first report of Microcystis strains producing mainly MC-WR and -FR toxins in Japan.
巻・号 11(9)
公開日 2019-9-9
DOI 10.3390/toxins11090521
PII toxins11090521
PMID 31505765
PMC PMC6784158
MeSH Animals Cell Line Environmental Monitoring Eutrophication Fresh Water / microbiology Insecta Japan Microcystins / analysis* Microcystins / genetics Microcystins / metabolism Microcystis / isolation & purification* Microcystis / metabolism Phylogeny Protein Phosphatase 2 / antagonists & inhibitors Protein Phosphatase 2 / genetics Protein Phosphatase 2 / metabolism Water Pollutants / isolation & purification*
IF 3.895
引用数 1
リソース情報
藻類 NIES-4344 NIES-4345