Syntheses and Biological Activities of Joro Spider Toxin Analogs to Spidamine and Joramine.
作者:Tadashige CHIBA、Toshifumi AKIZAWA、Motomi MATSUKAWA、Nobufumi KAWAI、Yoshiaki KONO、Masanori YOSHIOKA
DOI:10.1248/cpb.45.93
日期:——
In order to study the structure-activity relationships of spidamine and joramine found in the venom of Joro spider, Nephila clavata, we attempted to synthesize various analogs. Six analogs were convergently synthesized according to our previous method for the synthesis of spidamine, N-(3-aminopropyl-β-alanyl)-N'-(2, 4-dihydroxy-phenylacetyl-L-asparaginyl)-1, 5-pentanediamine and joramine, N-(3-aminopropyl-β-alanyl)-N'-(4-hydroxyphenyl-acetyl-L-asparaginyl)-1, 5-pentanediamine. The biological activities of the analogs and four intermediates were compared with those of synthetic spidamine and joramine in three bioassay systems, lobster neuromuscular synapse, cockroaches and mosquito larvae. The glutamate receptors in these systems were inhibited by some analogs, and the D-asparagine- or indoleacetyl-containing analogs were found to be strong inhibitors. These compounds have potential application as insecticides.
为了研究在Joro蜘蛛(Nephila clavata)毒液中发现的spidamine和joramine的结构-活性关系,我们尝试合成各种类似物。根据我们之前合成spidamine的的方法,我们共合成了六种类似物,分别是N-(3-氨基丙基-β-丙氨酸)-N'-(2, 4-二羟基苯乙酰-L-天冬氨酰)-1, 5-戊二胺和joramine,N-(3-氨基丙基-β-丙氨酸)-N'-(4-羟基苯乙酰-L-天冬氨酰)-1, 5-戊二胺。这些类似物及四种中间体的生物活性与合成的spidamine和joramine在三种生物测定系统中进行了比较,包括龙虾神经肌肉突触、蟑螂和蚊子幼虫。在这些系统中,某些类似物抑制了谷氨酸受体,而含有D-天冬氨酸或吲哚乙酰的类似物被发现是强抑制剂。这些化合物在农药方面具有潜在应用前景。