Elasticity of spider silks
Elasticity of spider silks
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蜘蛛丝的弹性
DOI：
10.1021/bm7014174
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发表时间：
2008-07-01
影响因子：
6.2
通讯作者：
Vollrath, Fritz
中科院分区：
文献类型：
--
作者：
Liu, Yi;Shao, Zhengzhong;Vollrath, Fritz
研究了不同脯氨酸含量的蜘蛛丝的弹性，并与桑蚕丝的弹性进行了比较。对于具有相似断裂应变（表明相似的分子有序性）的丝，弹性似乎随着脯氨酸含量的增加而增加。特别是，在所有的蜘蛛丝，内和种间关系之间的能力收缩（CSH）和应变恢复，而只有种间关系之间的CSH和工作恢复。从分子取向、结晶度、氨基酸基序和水合作用四个方面讨论了丝弹性的来源。我们的研究证实了这样的观点，即含有脯氨酸的基序不仅有助于蜘蛛丝的弹性，而且有助于其他生物弹性体。
The elasticity of spider MAA silks containing varying proline content was investigated and compared with that of silkworm (Bombyx mori) silk. For silks with similar breaking strain (suggesting similar molecular order), the elasticity appears to increase with increasing proline content. Particularly, across all spider silks, intra- and interspecies relationships are found between capacity to shrink (Csh) and strain recovery, while only the interspecies relationship is found between Csh and work recovery. Four factors, that is, molecular orientation, crystallinity, amino acid motif, and hydration, are discussed to explain the origin of silk's elasticity. Our study corroborates the view that proline-containing motifs contribute to the elasticity of not only spider silks, but also other bioelastomers.