Glycosyl-[60]fullerenes were first used as decontaminants against ricin, a lactose recognition proteotoxin in the Ricinus communis family. A fullerene glycoconjugate carrying two lactose units was synthesized by a [3 + 2] cycloaddition reaction between C60 and the azide group in 6-azidohexyl β-lactoside per-O-acetate. A colloidal aqueous solution with brown color was prepared from deprotected bis(lactosyl)-C60 and was found stable for more than 6 months keeping its red color. Upon mixing with an aqueous solution of Ricinus communis agglutinin (RCA120), the colloidal solution soon caused precipitations, while becoming colorless and transparent. In contrast, a solution of concanavalin A (Con A) caused no apparent change, indicating that the precipitation was caused specifically by carbohydrate–protein interactions. This notable phenomenon was quantified by means of sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), and the results were discussed in terms of detection and decontamination of the deadly biological toxin in the Ricinus communis family.
糖基化[60]
富勒烯首次被用作对蓖麻毒素的污染剂,蓖麻属中的一种
乳糖识别蛋白毒素。通过C60和6-azidohexyl β-lactoside per-O-acetate中的偶氮基团之间的[3+2]环加成反应合成了携带两个
乳糖单位的
富勒烯糖共轭物。从去保护的双(
乳糖基)-C60制备了棕色胶体
水溶液,并发现其保持红色稳定超过6个月。与蓖麻凝集素(RC
A120)的
水溶液混合后,胶体溶液很快引起沉淀,同时变成无色透明。相反,卡纳瓦林A(Con A)的溶液没有明显的变化,表明沉淀是由
碳水化合物-蛋白质相互作用引起的。这个显著的现象通过
十二烷基硫酸钠聚
丙烯酰胺凝胶电泳(
SDS-PAGE)进行了量化,并讨论了在蓖麻属中检测和清除致命的
生物毒素的结果。