Biglycan and decorin bind close to the n-terminal region of the collagen VI triple helix

Research output: Contribution to journalArticle

Abstract

The binding of native biglycan and decorin to pepsin-extracted collagen VI from human placenta was examined by solid phase assay and by measurement of surface plasmon resonance in the BIAcore(TM)2000 system. Both proteoglycans exhibited a strong affinity for collagen VI with dissociation constants (K(D)) of approximately 30 nm. Removal of the glycosaminoglycan chains by chondroitinase ABC digestion did not significantly affect binding. In coprecipitation experiments, biglycan and decorin bound to collagen VI and equally competed with the other, suggesting that biglycan and decorin bind to the same binding site on collagen VI. This was confirmed by electron microscopy after negative staining of complexes between gold-labeled proteoglycans and collagen VI, demonstrating that both biglycan and decorin bound exclusively to a domain close to the interface between the N terminus of the triple helical region and the following globular domain. In solid phase assay using recombinant collagen VI fragments, it was shown that the alpha2(VI) chain probably plays a role in the interaction.

Details

Authors
  • Charlotte Wiberg
  • Erik Hedbom
  • Alfia Khairullina
  • Shireen R. Lamande
  • Åke Oldberg
  • Rupert Timpl
  • Matthias Mörgelin
  • Dick Heinegård
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cell and Molecular Biology
Original languageEnglish
Pages (from-to)18947-18952
JournalJournal of Biological Chemistry
Volume276
Issue number22
Publication statusPublished - 2001
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Division of Infection Medicine (BMC) (013024020), Connective Tissue Biology (013230151), Åke Oldberg´s group (013212049)