Domain analysis of urokinase plasminogen activator (u-PA): Preparation and characterization of intact A-chain molecules

A. P. Mazar*, A. Buko, A. M. Petros, E. S. Barnathan, J. Henkin

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    30 Scopus citations

    Abstract

    We have prepared and purified the amino terminal fragment (ATF) or urokinase-type plasminogen activator (u-PA), as well as the kringle and the growth factor domain (GFD) of which it is composed. Structural studies on these materials are currently under way. In addition, we have demonstrated that either the ATF or its GFD portion can inhibit tumour cell invasion in vitro, and that both can likewise act as mitogens and induce differentiation in certain cell lines. Our results also suggest that the fucose attached to Thr18 may be essential for at least some of these activities, since defucosylated GFD becomes inactive in mitogenesis. Clearly the ATF has activities beyond simply anchoring u-PA to the cell surface. Availability of separated, purified domains will allow both structural and functional dissection of these activities.

    Original languageEnglish (US)
    Pages (from-to)49-55
    Number of pages7
    JournalFibrinolysis and Proteolysis
    Volume6
    Issue numberSUPPL. 1
    DOIs
    StatePublished - Jan 1 1992

    ASJC Scopus subject areas

    • Hematology

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