Studies on paralytic shellfish poisoning in tropical waters. Part IV. Structures of two paralytic shellfish toxins, gonyautoxins V and VI, isolated from a tropical dinoflagellate, Pyrodinium bahamense var. compressa.
摘要:
从一种名为巴哈马热鞭毛藻(pyrodinium bahamense var. compressa)的热带鞭毛藻中分离出的两种麻痹性贝类毒素——戈尼亚毒素V和戈尼亚毒素VI,分别被鉴定为含有磺酰胺基氨基甲酰基部分的石房蛤毒素和新型石房蛤毒素的衍生物。
DOI:
10.1271/bbb1961.46.1861
作为产物:
描述:
Protogonyautoxin II 在
2-巯基乙醇 作用下,
反应 2.0h,
以48%的产率得到膝沟藻毒素 V
参考文献:
名称:
Preparation of Calibration Standards of N1-H Paralytic Shellfish Toxin Analogues by Large-Scale Culture of Cyanobacterium Anabaena circinalis (TA04)
Toxins B1 and B2 from cultured dinoflagellates of the genus Protogonyaulax are shown to be the carbamoyl-N-sulfo derivatives of saxitoxin and neosaxitoxin, the structures confirmed by synthesis from the corresponding decarbamoyl toxins.
Studies on paralytic shellfish poisoning in tropical waters. Part IV. Structures of two paralytic shellfish toxins, gonyautoxins V and VI, isolated from a tropical dinoflagellate, Pyrodinium bahamense var. compressa.
Two paralytic shellfish toxins, gonyautoxin V and gonyautoxin VI, isolated from a tropical dinoflagellate, pyrodinium bahamense var. compressa, were identified respectively to be derivatives of saxitoxin and neosaxitoxin with a sulfonatocarbamoyl moiety.
从一种名为巴哈马热鞭毛藻(pyrodinium bahamense var. compressa)的热带鞭毛藻中分离出的两种麻痹性贝类毒素——戈尼亚毒素V和戈尼亚毒素VI,分别被鉴定为含有磺酰胺基氨基甲酰基部分的石房蛤毒素和新型石房蛤毒素的衍生物。
Preparation of Calibration Standards of N1-H Paralytic Shellfish Toxin Analogues by Large-Scale Culture of Cyanobacterium Anabaena circinalis (TA04)
Mouse bioassay is the official testing method to quantify paralytic shellfish toxins (PSTs) in bivalves. A number of alternative analytical methods have been reported. Some methods have been evaluated by a single laboratory validation. Among the different types of methods, chemical analyses are capable of identifying and quantifying the toxins, however a shortage of the necessary calibration standards hampers implementation of the chemical analyses in routine monitoring of PSTs in bivalves. In our present study, we studied preparation of major PST analogues as calibrants by large-scale cultivation of toxic freshwater cyanobacteria Anabaena circinalis TA04. The cells were steadily grown in 10 L bottle for 28 days. The primary N1-H toxins, C1/C2, were produced at a concentration of 1.3 ± 0.1 µmol/L. The intracellular and extracellular toxins occupied 80% and 20%, respectively. Over 220 µmol of the toxins was obtained from approximately 200 L of the culture over six months, demonstrating that it is sufficient to prepare saxitoxin analogues. The toxins were chemically converted to six N1-H analogues. Preparation of the analogues was carried out at relatively high yields (50–90%). The results indicate that our preparation method is useful to produce N1-H toxins. In our present study, detailed conditions for preparation of one of the rare N1-H analogues, gonyautoxin-5, were investigated.