来自Rhabdophis tigrinus毒的依赖的原激活剂,具有扩展基质特异性的毒素
Noboru Inoue1, Yoshihiko Sakurai1, Kyoko Hasuwa1
1Department of Legal Medicine, Nara Medical University, Kashihara, Nara, Japan.
概括
这种蛇是Rhabdophis tigrinus蛇.
科学领域:
- 生物化学 生物化学
- 毒理学 毒理学 毒理学
- 酶学 是一种酶学.
背景情况:
- 拉布多菲斯老虎 (Rhabdophis tigrinus) 的毒液含有一种强大的前列血激活剂.
- 该酶的特性和分类以前是未知的.
研究的目的:
- 从R. tigrinus毒液中部分净化和表征前热血素激活剂.
- 为了确定其酶和结构性质,并对酶进行分类.
主要方法:
- 使用凝过和酸色谱进行部分净化.
- SDS-PAGE,抑制剂研究,以及LC/MS分析.
- 使用人体血和合成的蛋白质激活测试.
主要成果:
- 一个与二硫化物结合的同极聚合物 (约. 110 kDa) 被净化,称为拉巴达林.
- 拉巴达林是一种依赖的金属蛋白酶,而不是血清蛋白酶.
- 它充当A组原激素激活剂,其特异性取决于序列-上下文.
结论:
- 拉巴达林是一种新的依赖的金属蛋白酶.
- 它代表了一类独特的前激素激活剂,具有明显的基质特异性.
- 提供了关于蛇毒凝固酶进化和分类的新见解.
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