Dry-Spun Silk Produces Native-Like Fibroin Solutions.

Dry-Spun Silk Produces Native-Like Fibroin Solutions.
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DOI:
10.1021/acs.biomac.6b00887
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发表时间:
2016-10-10
期刊:
影响因子:
6.2
通讯作者:
Vollrath, Fritz
Vollrath, Fritz
中科院分区:
化学2区
文献类型:
--
作者:
Boulet-Audet, Maxime;Holland, Chris;Gheysens, Tom;Vollrath, Fritz

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Silk优异的机械性能和节能固化机制为生物材料自组装提供了灵感,并为许多生物技术应用提供了多样化的材料平台。现在的实验表明桑葚在几乎“未纺”的状态下分泌其丝,该状态保留了大部分溶剂水,并且与完全形成和成熟的纤维中发现的状态相比,表现出令人惊讶的低分子有序度(β-折叠结晶度)。这些新的观察结果挑战了对丝绸纺纱的一般理解,特别是纺纱导管在结构发展中的作用。基于这一发现,我们报告说,在低湿度下纺制的丝似乎阻止了对β折叠形成至关重要的分子退火过程。这反过来又具有显著的积极意义,使得能够生产具有类似于未纺天然丝的黄金标准的性质的高保真重构丝素蛋白。
Silk’s outstanding mechanical properties and energy efficient solidification mechanisms provide inspiration for biomaterial self-assembly as well as offering a diverse platform of materials suitable for many biotechnology applications. Experiments now reveal that the mulberry silkworm Bombyx mori secretes its silk in a practically “unspun” state that retains much of the solvent water and exhibits a surprisingly low degree of molecular order (β-sheet crystallinity) compared to the state found in a fully formed and matured fiber. These new observations challenge the general understanding of silk spinning and in particular the role of the spinning duct for structure development. Building on this discovery we report that silk spun in low humidity appears to arrest a molecular annealing process crucial for β-sheet formation. This, in turn, has significant positive implications, enabling the production of a high fidelity reconstituted silk fibroin with properties akin to the gold standard of unspun native silk.
DOI: 10.1242/jeb.128306
发表时间: 2015-10
期刊: The Journal of experimental biology
影响因子: --
作者:
Boulet-Audet M;Vollrath F;Holland C
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