carboxypeptidase M (CPM)
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Function
- specifically removes C-terminal basic residues (Arg or Lys) from peptides & proteins
- role in the control of peptide hormone & growth factor activity at the cell surface, & in the membrane-localized degradation of extracellular proteins (putative)
Cofactor: binds 1 Zn+2 per subunit
Structure
belongs to the peptidase M14 family
Compartment
cell membrane, lipid-anchor, GPI-anchor