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Purification of an insect derived recombinant human ADAMTS-1 reveals novel gelatin (type I collagen) degrading activities.
2006 (English)In: Molecular and Cellular Biochemistry, ISSN 0300-8177, E-ISSN 1573-4919, Vol. 281, no 1-2, 95-102 p.Article in journal (Refereed) Published
Abstract [en]

ADAMTS-1 (A Disintegrin And Metalloprotease with ThromboSpondin repeats) is a member of a family of secreted proteolytic enzymes with a complex modular structure. These enzymes are characterised by an N-terminal metalloproteinase domain, a disintegrin-like domain and a carboxyl terminal region containing variable numbers of a repeat sequence with homology to thrombospondin-1. The expression of the gene for ADAMTS-1 has been associated with inflammation, ovulation, angiogenesis, cellular proliferation and bone formation. ADAMTS-1 can proteolytically process large proteoglycans indicating a potential role in extracellular matrix turnover. In this study, we have tested ADAMTS-1 activity in gelatin zymogram assays. Since previous data demonstrate that ADAMTS-1 is a matrix metalloproteinase (MMP) substrate and is highly unstable in conditioned medium from eukaryotic cell types, we created an insect cell line expressing human ADAMTS-1. We isolated an epitope tagged full-length recombinant ADAMTS-1 from serum free insect cell conditioned medium. The purified protein had aggrecanase activity and appears as two major bands on the silver stained SDS-PAGE corresponding well to a pro-domain on form of 115 kDa and a pro-domain off form of 90 kDa. Using denatured type I collagen in zymographic analysis we demonstrate that ADAMTS-1 has a previously unreported gelatinolytic activity. Also, we notice that processing of its C-terminal region by an apparently autocatalytic process reveals a 27 kDa species with gelatinolytic activity. Furthermore, we show that MMP2 but not MMP13 remove ADAMTS-1 specific gelatin zymopraphic zones.

Place, publisher, year, edition, pages
2006. Vol. 281, no 1-2, 95-102 p.
URN: urn:nbn:se:uu:diva-133859DOI: 10.1007/s11010-006-0637-yPubMedID: 16328961OAI: oai:DiVA.org:uu-133859DiVA: diva2:370458
Available from: 2010-11-16 Created: 2010-11-16 Last updated: 2010-11-16

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