Chitin is a functional component of the larval adhesive of barnacles.,Communications Biology

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Chitin is a functional component of the larval adhesive of barnacles.
Communications Biology ( IF 5.2 ) Pub Date : 2020-01-17 , DOI: 10.1038/s42003-020-0751-5
Nick Aldred ₁ , Vera Bin San Chan _{2,

3} , Kaveh Emami ₄ , Keiju Okano ₅ , Anthony S Clare ₁ , Andrew S Mount ₂

Affiliation

Barnacles are the only sessile crustaceans, and their larva, the cyprid, is supremely adapted for attachment to surfaces. Barnacles have a universal requirement for strong adhesion at the point of larval attachment. Selective pressure on the cyprid adhesive has been intense and led to evolution of a tenacious and versatile natural glue. Here we provide evidence that carbohydrate polymers in the form of chitin provide stability to the cyprid adhesive of Balanus amphitrite. Chitin was identified surrounding lipid-rich vesicles in the cyprid cement glands. The functional role of chitin was demonstrated via removal of freshly attached cyprids from surfaces using a chitinase. Proteomic analysis identified a single cement gland-specific protein via its association with chitin and localized this protein to the same vesicles. The role of chitin in cyprid adhesion raises intriguing questions about the evolution of barnacle adhesion, as well as providing a new target for antifouling technologies.

中文翻译：

几丁质是藤壶幼虫粘合剂的功能成分。

藤壶是唯一的无柄甲壳类动物，其幼虫，赛普拉斯（Cyprid）最适合附着在表面上。藤壶普遍要求在幼虫附着点具有牢固的附着力。赛普拉斯粘合剂上的选择性压力很大，并导致了坚韧而通用的天然胶的发展。在这里，我们提供的证据表明，几丁质形式的碳水化合物聚合物可为Balanus amphitrite的塞浦路斯胶粘剂提供稳定性。在塞浦路斯水泥腺中发现了甲壳质周围富含脂质的囊泡。几丁质的功能作用是通过使用几丁质酶从表面除去新鲜附着的赛普拉斯来证明的。蛋白质组学分析通过与甲壳质的结合鉴定了单个水泥腺特异蛋白质，并将该蛋白质定位于相同的囊泡。

更新日期：2020-01-17

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