Neutrophil collagenase, also known as matrix metalloproteinase-8 (MMP-8) or PMNL collagenase (MNL-CL), is a collagencleavingenzyme which is present in the connective tissue of most mammals.[5] In humans, the MMP-8 protein is encoded by the MMP8gene.[6][7]
The gene is part of a cluster of MMP genes which localize to chromosome 11q22.3.[5] Most MMP's are secreted as inactive proproteins which are activated when cleaved by extracellular proteinases. However, the enzyme encoded by this gene is stored in secondary granules within neutrophils and is activated by autolytic cleavage.