Matrix
metalloproteinases (MMPs) belong to a family of proteases
that are essential for the breakdown of extracellular matrix
(ECM). They are thus important in apoptosis, tumor cell
growth, invasion, and metastasis, as well as angiogenesis
and wound healing. Most MMPs contain common domain structures
that include a signal sequence, a propeptide, a catalytic
domain, and a hemopexin-like (Hpx) domain. MMP7, also known
as matrilysin, is responsible for hydrolyzing proteoglycans
and ECM glycoproteins. It is expressed in normall cells,
specifically glandular epithelial cells.
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