Fibulin-1 acts as a cofactor for the matrix metalloprotease ADAMTS-1

Nathan V. Lee, Juan Carlos Rodriguez-Manzaneque, Shelley N.M. Thai, Waleed O. Twal, Alfonso Luque, Karen M. Lyons, W. Scott Argraves, M. Luisa Iruela-Arispe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Scopus citations


ADAMTS-1 is a metalloprotease that has been implicated in the inhibition of angiogenesis and is a mediator of proteolytic cleavage of the hyaluronan binding proteoglycans, aggrecan and versican. In an attempt to further understand the biological function of ADAMTS-1, a yeast two-hybrid screen was performed using the carboxyl-terminal region of ADAMTS-1 as bait. As a result, the extracellular matrix protein fibulin-1 was identified as a potential interacting molecule. Through a series of analyses that included ligand affinity chromatography, co-immunoprecipitation, pulldown assays, and enzyme-linked immunosorbent assay, the ability of these two proteins to interact was substantiated. Additional studies showed that ADAMTS-1 and fibulin-1 colocalized in vivo. Furthermore, fibulin-1 was found to enhance the capacity of ADAMTS-1 to cleave aggrecan, a proteoglycan known to bind to fibulin-1. We confirmed that fibulin-1 was not a proteolytic substrate for ADAMTS-1. Together, these findings indicate that fibulin-1 is a new regulator of ADAMTS-1-mediated proteoglycan proteolysis and thus may play an important role in proteoglycan turnover in tissues where there is overlapping expression.

Original languageEnglish (US)
Pages (from-to)34796-34804
Number of pages9
JournalJournal of Biological Chemistry
Issue number41
StatePublished - Oct 14 2005

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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