Direct measurement of the rupture force of single pair of decorin interactions

Xuhui Liu, Ming Long Yeh, Jack L. Lewis, Zong Ping Luo

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Decorin is one important member of the family of small leucine-rich proteoglycans, which are widely distributed in connective tissues in the body such as tendon and ligament. Decorin may be responsible for collagen fibril connection in those tissues. A recent hypothesis suggests that decorin may bind to collagen with its core protein while binding to another decorin through the interaction with their glycosaminoglycan (GAG) chains. However, there is no direct evidence supporting this hypothesis to date. In this study, the interaction of decorin GAG chains was directly determined for the first time. The rupture force of single bonds between decorins (GAG chains interaction) was determined directly as 16.5 ± 5.1 pN using a laser tweezers/ interferometer single molecular nanomechanical testing system. This information can improve our understanding of the mechanical properties of connective tissues at the molecular level.

Original languageEnglish (US)
Pages (from-to)1342-1345
Number of pages4
JournalBiochemical and Biophysical Research Communications
Issue number3
StatePublished - Dec 23 2005
Externally publishedYes

Bibliographical note

Funding Information:
This study was supported by a grant from the Arthritis Foundation. We also thank Carolyn Adams for her assistance in the preparation of this paper.


  • Decorin
  • Interferometer
  • Laser tweezers
  • Ligament
  • Rupture force
  • Tendon


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