Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in regulation of apoptotic process. Predicted to act upstream of or within regulation of systemic arterial blood pressure by renin-angiotensin and vasoconstriction. Predicted to be active in extracellular space. Is expressed in brain; gill; heart; liver; and pleuroperitoneal region. Human ortholog(s) of this gene implicated in several diseases, including Fabry disease; Henoch-Schoenlein purpura; artery disease (multiple); heart conduction disease (multiple); and hydronephrosis. Orthologous to human AGT (angiotensinogen).