The cytoplasmic tail peptide sequence of membrane type-1 matrix metalloproteinase (MT1-MMP) directly binds to gC1qR, a compartment-specific chaperone-like regulatory protein.

Membrane type-1 matrix metalloproteinase (MT1-MMP), a key enzyme in cell locomotion, is known to be primarily recruited to the leading edge of migrating cells. This raises a possibility that the C-terminal cytoplasmic tail of MT1-MMP interacts with intracellular regulatory proteins, which modulate translocations of the protease across the cell. Here, ...
we demonstrated that MT1-MMP via its cytoplasmic tail directly associates with a chaperone-like compartment-specific regulator gC1qR. Although a direct functional link between these two proteins remains uncertain, our observations suggest that the transient associations of gC1qR with the cytoplasmic tail of MT1-MMP are likely to be involved in the mechanisms regulating presentation of the protease at the tumor cell surface.
Mesh Terms:
Amino Acid Sequence, Antigens, CD44, Binding Sites, Breast Neoplasms, Carrier Proteins, Cell Compartmentation, Cytoplasm, Humans, Matrix Metalloproteinases, Membrane-Associated, Membrane Glycoproteins, Metalloendopeptidases, Mitochondrial Proteins, Molecular Sequence Data, Peptide Fragments, Precipitin Tests, Receptors, Complement, Tumor Cells, Cultured
FEBS Lett.
Date: Sep. 11, 2002
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