Search for a "toxic site" in snake venom phospholipases A2.

E Arriagada, H Cid
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Abstract

Secondary structure predictions on nine snake venom phospholipases A2 by the Chou and Fasman and Cid et al. prediction methods, have led to the location of two possible "toxic sites", responsible for the neurotoxic and myotoxic action of the basic snake venom PLA2, respectively. The accessibility to the neurotoxic site is blocked by the presence of a small helical structure (helix D in the bovine PLA2). The role of lysine residues is found to be decisive in the venom's toxicity.

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搜索蛇毒磷脂酶A2中的“有毒部位”。
Chou和Fasman以及Cid等人的预测方法对九种蛇毒磷脂酶A2的二级结构进行了预测,发现了两个可能的“毒性位点”,分别负责基本蛇毒PLA2的神经毒性和肌毒性作用。进入神经毒性部位被一个小螺旋结构(牛PLA2中的螺旋D)的存在所阻断。发现赖氨酸残基的作用在毒液的毒性中起决定性作用。
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