Volume 107, Issue 1-6 pp. 38-44

Mechanisms for pro matrix metalloproteinase activation

GILLIAN MURPHY

Corresponding Author

GILLIAN MURPHY

School of Biological Sciences, University of East Anglia, Norwich, UK

School of Biological Sciences, University of East Anglia, Norwich, UK.Search for more papers by this author
HEATHER STANTON

HEATHER STANTON

School of Biological Sciences, University of East Anglia, Norwich, UK

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SUSAN COWELL

SUSAN COWELL

Strangeways Research Laboratory, Cambridge, UK

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GEORGINA BUTLER

GEORGINA BUTLER

School of Biological Sciences, University of East Anglia, Norwich, UK

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VERA KNÄUPER

VERA KNÄUPER

School of Biological Sciences, University of East Anglia, Norwich, UK

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SUSAN ATKINSON

SUSAN ATKINSON

School of Biological Sciences, University of East Anglia, Norwich, UK

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JELENA GAVRILOVIC

JELENA GAVRILOVIC

School of Biological Sciences, University of East Anglia, Norwich, UK

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First published: 15 August 2009
Citations: 328

Abstract

The activation of pro matrix metalloproteinases (MMPs) by sequential proteolysis of the propeptide blocking the active site cleft is regarded as one of the key levels of regulation of these proteinases. Potential physiological mechanisms including cell-associated plasmin generation by urokinase-like plasminogen activator, or the action of cell surface MT1-MMPs appear to be involved in the initiation of cascades of pro MMP activation. Gelatinase A, collagenase 3 and gelatinase B may be activated by MT-MMP based mechanisms, as evidenced by both biochemical and cell based studies. Hence the regulation of MT-MMPs themselves becomes critical to the determination of MMP activity. This includes activation, assembly at the cell surfaces as TIMP-2 complexes and subsequent inactivation by proteolysis or TIMP inhibition.

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