期刊
JOURNAL OF STRUCTURAL BIOLOGY
卷 170, 期 2, 页码 413-419出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jsb.2009.12.027
关键词
Spider silk; Protein assembly; Salt; Shear
资金
- German Federal Ministry of Education and Research [BMBF 13N9736]
- Alexander von Humboldt Foundation
- Graduiertenforderung nach dem bayerischen Eliteforderungsgesetz
- German Research Foundation [BMBF 13N9736, DFG SCHE 603/4-3]
Major ampullate silk fibers of orb web-weaving spiders have impressive mechanical properties due to the fact that the underlying proteins partially fold into helical/amorphous structures, yielding relatively elastic matrices that are toughened by anisotropic nanoparticulate inclusions (formed from stacks of beta-sheets of the same proteins). In vivo the transition from soluble protein to solid fibers involves a combination of chemical and mechanical stimuli (such as ion exchange, extraction of water and shear forces). Here we elucidate the effects of such stimuli on the in vitro aggregation of engineered and recombinantly produced major ampullate silk-like proteins (focusing on structure-function relationships with respect to their primary structures), and discuss their relevance to the storage and assembly of spider silk proteins in vivo. (C) 2009 Elsevier Inc. All rights reserved.
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