Serine-type endopeptidase involved in atrial natriuretic peptide (NPPA) and brain natriuretic peptide (NPPB) processing (PubMed:10880574, PubMed:21288900, PubMed:20489134, PubMed:21763278).
Converts through proteolytic cleavage the non-functional propeptides NPPA and NPPB into their active hormones, ANP and BNP(1-32) respectively, thereby regulating blood pressure in the heart and promoting natriuresis, diuresis and vasodilation (PubMed:10880574, PubMed:21288900, PubMed:20489134, PubMed:21763278).
Proteolytic cleavage of pro-NPPA also plays a role in female pregnancy by promoting trophoblast invasion and spiral artery remodeling in uterus (PubMed:22437503).
Also acts as a regulator of sodium reabsorption in kidney (By similarity).
has weaker endopeptidase activity compared to isoform 1.
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