FUNCTION Cell surface proteoglycan which regulates dendritic arbor morphogenesis.SUBUNIT Interacts (via cytoplasmic domain) with SARM1 (PubMed:21555464). Forms a complex with SDCBP and PDCD6IP (By similarity).INTERACTION Preferential expression in cells of mesenchymal origin.PTM O-glycosylated; contains both heparan sulfate and chondroitin sulfate.PTM Phosphorylated on serine residues.SIMILARITY Belongs to the syndecan proteoglycan family.
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