Enables hormone activity. Involved in several processes, including negative regulation of biosynthetic process; positive regulation of cGMP-mediated signaling; and positive regulation of osteoblast differentiation. Acts upstream of or within receptor guanylyl cyclase signaling pathway. Located in extracellular space and secretory granule. Biomarker of aortic valve stenosis and heart disease. Human ortholog(s) of this gene implicated in hypertension. Orthologous to human NPPC (natriuretic peptide C). [provided by Alliance of Genome Resources, Apr 2022]