Enables serine-type endopeptidase activity. Acts upstream of or within lipid metabolic process and protein import into nucleus. Located in Golgi stack. Is expressed in genitourinary system. Human ortholog(s) of this gene implicated in spondyloepiphyseal dysplasia Kondo-Fu type. Orthologous to human MBTPS1 (membrane bound transcription factor peptidase, site 1). [provided by Alliance of Genome Resources, Apr 2022]