Stretching type II collagen with optical tweezers

Yu Long Sun, Zong Ping Luo, Andrzej Fertala, Kai Nan An

研究成果: Article同行評審

105 引文 斯高帕斯(Scopus)

摘要

Collagens are the most abundant proteins of vertebrates and they provide mechanical and supportive functions in a wide range of connective tissues. Knowledge of the mechanical properties of single collagen molecules is essential in studying the self-assembly of collagen, the interaction between cells and extracellular matrix, the etiology of tissue degeneration and mechanism of regeneration, and the relationship between the structures and mechanical properties of tissues. Here we stretched single type II collagen molecules in neutral pH solution using optical tweezers. The molecular parameters of collagen were obtained by fitting force-extension curves into worm-like chain elasticity model. The molecule length of type II collagen monomer was 295.8nm. The persistence length of type II collagen monomer was 11.2nm. These observations indicate that collagen molecules are flexible rather than rigid rod molecules at neutral pH solution.

原文English
頁(從 - 到)1665-1669
頁數5
期刊Journal of Biomechanics
37
發行號11
DOIs
出版狀態Published - 2004 十一月

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

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