| Tissue Specificity | Highly expressed in synovial tissue, cartilage and liver and weakly in heart and lung. Isoform B is expressed in kidney, lung, liver, heart and brain. Isoform C and isoform D are widely expressed. |
| Post Translational Modifications | N-glycosylated. O-glycosylated.contains glycosaminoglycan chondroitin sulfate and keratan sulfate. O-glycosylated with sialylated oligosaccharides which are predominantly represented by the monosialylated core type I structure, NeuNAcalpha2-3Galbeta1-3GalNAc, with smaller amounts of disialylated O-glycans. The disulfide bond between Cys-1146 and Cys-1403 is essential for protein cleavage. Proteolytically cleaved by cathepsin CTSG. |
| Function | Plays a role in boundary lubrication within articulating joints. Prevents protein deposition onto cartilage from synovial fluid by controlling adhesion-dependent synovial growth and inhibiting the adhesion of synovial cells to the cartilage surface. Isoform F plays a role as a growth factor acting on the primitive cells of both hematopoietic and endothelial cell lineages. |
| Protein Name | Proteoglycan 4LubricinMegakaryocyte-Stimulating FactorSuperficial Zone Proteoglycan Cleaved Into - Proteoglycan 4 C-Terminal Part |
| Cellular Localisation | Secreted |
| Alternative Antibody Names | Anti-Proteoglycan 4 antibodyAnti-Lubricin antibodyAnti-Megakaryocyte-Stimulating Factor antibodyAnti-Superficial Zone Proteoglycan Cleaved Into - Proteoglycan 4 C-Terminal Part antibodyAnti-PRG4 antibodyAnti-MSF antibodyAnti-SZP antibody |
Information sourced from Uniprot.org
