Matrix
Metalloproteinase 24 (MMP24, MT5MMP) has been described
as a proteoglycanase, which is critical in the turnover
of ECM (extracellular matrix) components in the brain.
MMP24 contains a candidate signal sequence, a propeptide
region, a potential furin recognition motif, a zinc-binding
catalytic domain, a hemopexin-like domain, a 24-residue
hydrophobic region, which acts as a potential transmembrane
domain, and a short cytosolic domain. Unlike other MTMMPs,
MMP24 (MT5MMP) sheds from the cell surface as soluble proteinases,
allowing its versatility as both a cell bound and soluble
proteinase in ECM remodeling processes. MMP24 is elevated
in several tumor cell lines, and is also produced by some
normal cell lines. It is predominantly expressed in the
brain, indicating a role in nervous system development.
MMP24 is also highly expressed during embryonic development.
The mouse MMP24 gene maps to chromosome 2.
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