Storage and release of hydrogen cyanide in a chelicerate (Oribatula tibialis)
Storage and release of hydrogen cyanide in a chelicerate (Oribatula tibialis)
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DOI：
10.1073/pnas.1618327114
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发表时间：
2017-03-28
影响因子：
11.1
通讯作者：
Heethoff, Michael
中科院分区：
文献类型：
--
作者：
Brueckner, Adrian;Raspotnig, Guenther;Heethoff, Michael
氰化氢是一种化学防御策略，其中氰化氢（HCN，氢氰酸或氢氰酸）被生产，储存，并释放到攻击的敌人。HCN的高毒性和挥发性需要化学稳定储存和防止意外自中毒。少数已知的产氰动物仅是下颌骨节肢动物（某些多足类动物和昆虫），它们以产氰苷、脂类或氰醇的形式储存HCN。在这里，我们表明，蓝藻也进化在物种Chelicerata。甲螨（Oribatula tibialis）利用氰基芳酯己烯腈酯（MNH）储存HCN，其降解途径有两种，均可释放HCN。MNH由外分泌油腺分泌，油腺是大多数甲状生物体内化学防御的有力器官。
Cyanogenesis denotes a chemical defensive strategy where hydrogen cyanide (HCN, hydrocyanic or prussic acid) is produced, stored, and released toward an attacking enemy. The high toxicity and volatility of HCN requires both chemical stabilization for storage and prevention of accidental self-poisoning. The few known cyanogenic animals are exclusively mandibulate arthropods (certain myriapods and insects) that store HCN as cyanogenic glycosides, lipids, or cyanohydrins. Here, we show that cyanogenesis has also evolved in the speciose Chelicerata. The oribatid mite Oribatula tibialis uses the cyanogenic aromatic ester mandelonitrile hexanoate (MNH) for HCN storage, which degrades via two different pathways, both of which release HCN. MNH is emitted from exocrine opisthonotal oil glands, which are potent organs for chemical defense inmost oribatidmites.