Peptidase that cleaves SIBLING (small integrin-binding ligand, N-linked glycoprotein)-derived ASARM peptides, thus regulating their biological activity . Cleaves ASARM peptides between Ser and Glu or Asp residues . Regulates osteogenic cell differentiation and bone mineralization through the cleavage of the MEPE-derived ASARM peptide . Promotes dentin mineralization and renal phosphate reabsorption by cleaving DMP1- and MEPE-derived ASARM peptides . Inhibits the cleavage of MEPE by CTSB/cathepsin B thus preventing MEPE degradation .
Cell membrane ; Single-pass type II membrane protein .
Specifically expressed in ovary (PubMed:9070861). Expressed at low levels in kidney (PubMed:9070861).
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