Understanding the Mechanical Properties of Antheraea Pernyi Silk-From Primary Structure to Condensed Structure of the Protein
Understanding the Mechanical Properties of Antheraea Pernyi Silk-From Primary Structure to Condensed Structure of the Protein
复制标题
了解柞蚕丝的机械特性——从蛋白质的一级结构到凝聚态结构
DOI：
10.1002/adfm.201001046
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发表时间：
2011-02-22
影响因子：
19
通讯作者：
Shao, Zhengzhong
中科院分区：
文献类型：
--
作者：
Fu, Chengjie;Porter, David;Shao, Zhengzhong
Antheraea pernyi(A.pernyi)丝是由“野生”家蚕生产并用来构筑蚕茧的，但其蛋白质的一级结构与蜘蛛主要壶腹丝用于织网和拖网的一级结构非常相似。对这种特殊的丝蛋白的研究可能会为整个动物丝蛋白家族的结构-性质关系提供有价值的知识。本工作采用强制卷取的方法制得了大尺度缺陷少的Pernyi真丝纤维，并对其进行了详细的研究。结果表明，这种蚕丝纤维的断裂应力和断裂韧性与蜘蛛大壶腹丝和桑蚕丝的断裂强度相当。其他力学性能，如弹性、超收缩、水对弹性的影响等介于蜘蛛大壶腹丝和桑蚕丝之间。因此，本文基于有序分数解释了蚕丝蛋白质一级结构与蚕丝力学性能之间的关系，而有序分数又由蚕丝的蛋白质序列和纺丝过程共同决定。
Antheraea pernyi (A. pernyi) silk is produced and used by "wild" silkworms to construct a cocoon, but the primary structure of its protein is rather similar to that of spider major ampullate silk used to build web and dragline. Studies on this specific silk may provide valuable knowledge about the structure-property relationship for the whole animal silk family. In this work, A. pernyi silk fibers with few macroscale defects are obtained by forcibly reeling, and are investigated in detail. It is found that such silk fibers display breaking stress and toughness of the same magnitude as spider major ampullate silks and forcibly reeled mulberry silk. The other mechanical properties, such as elasticity, supercontraction, and the effect of water on modulus are between those of spider major ampullate silks and mulberry silk. Therefore, an interpretation of the connection between the primary structures of silk proteins and the mechanical properties of silks is proposed here based on the ordered fraction, which in turn is determined by both the protein sequence and spinning process of the silk.