Enables several functions, including calcium-dependent protein binding activity; protein homodimerization activity; and serine-type endopeptidase activity. Predicted to be involved in complement activation, lectin pathway and negative regulation of complement activation. Located in extracellular space. Human ortholog(s) of this gene implicated in 3MC syndrome 1. Orthologous to human MASP1 (MBL associated serine protease 1). [provided by Alliance of Genome Resources, Apr 2022]