Plasma membrane-bound tissue inhibitor of metalloproteinases (TIMP)-2 specifically inhibits matrix metalloproteinase 2 (gelatinase A) activated on the cell surface

J Biol Chem. 1998 Sep 18;273(38):24360-7. doi: 10.1074/jbc.273.38.24360.

Abstract

The cell-surface activation of pro-matrix metalloproteinase 2 (pro-MMP-2) is considered to be critical for cell migration and invasion. Treatment of human uterine cervical fibroblasts with concanavalin A activates pro-MMP-2 on the cell surface by converting it to the 65-kDa form with a minor form of 45 kDa. However, the 65-kDa MMP-2 was inactivated by tissue inhibitor of metalloproteinases (TIMP)-2 that was bound to the plasma membrane upon concanavalin A treatment. TIMP-2 binds to the plasma membrane through its N-terminal domain by two different modes of interaction as follows: one is sensitive to a hydroxamate (HXM) inhibitor of MMPs and the other is HXM-insensitive. TIMP-2 bound to the membrane in a HXM-insensitive manner, comprising about 40-50% of TIMP-2 on the membrane, is the inhibitor of the cell surface-activated MMP-2. It, however, does not inhibit MMP-3, MMP-9, and the 45-kDa MMP-2 lacking the C-terminal domain. The inhibition of the 65-kDa MMP-2 by TIMP-2 is initiated by the interaction of their C-terminal domains. Subsequently, the MMP-2.TIMP-2 complex is released from the membrane, and the activity of MMP-2 is blocked by TIMP-2. In the presence of collagen types I, II, III, V, or gelatin, the rate of inhibition of the 65-kDa MMP-2 by the membrane-bound TIMP-2 decreased considerably. These results suggest that the pericellular activity of MMP-2 is tightly regulated by membrane-bound TIMP-2 and surrounding extracellular matrix components.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • CHO Cells
  • Cell Membrane / metabolism
  • Cells, Cultured
  • Collagenases / metabolism
  • Concanavalin A / pharmacology
  • Cricetinae
  • Enzyme Activation
  • Female
  • Fibroblasts / cytology
  • Fibroblasts / enzymology
  • Gelatinases / antagonists & inhibitors
  • Gelatinases / metabolism*
  • Humans
  • Hydroxamic Acids / pharmacology
  • Kinetics
  • Matrix Metalloproteinase 2
  • Matrix Metalloproteinase 3 / metabolism
  • Matrix Metalloproteinase 9
  • Metalloendopeptidases / antagonists & inhibitors
  • Metalloendopeptidases / metabolism*
  • Molecular Weight
  • Recombinant Proteins / metabolism
  • Tissue Inhibitor of Metalloproteinase-2 / metabolism*
  • Transfection
  • Uterus / cytology
  • Uterus / enzymology

Substances

  • Hydroxamic Acids
  • Recombinant Proteins
  • Concanavalin A
  • Tissue Inhibitor of Metalloproteinase-2
  • Collagenases
  • Gelatinases
  • Metalloendopeptidases
  • Matrix Metalloproteinase 3
  • Matrix Metalloproteinase 2
  • Matrix Metalloproteinase 9