Sequence of this protein is as follows: MRIAVICFCL LGITCAIPVK QADSGSSEEK QLYNKYPDAV ATWLNPDPSQ KQNLLAPQTL PSKSNESHDH MDDMDDEDDD DHVDSQDSID SNDSDDVDDT DDSHQSDESH HSDESDELVT DFPTDLPATE VFTPVVPTVD TYDGRGDSVV YGLRSKSKKF RRPDIQYPDA TDEDITSHME SEELNGAYKA IPVAQDLNAP SDWDSRGKDS YETSQLDDQS AETHSHKQSR LYKRKANDES NEHSDVIDSQ ELSKVSREFH SHEFHSHEDM LVVDPKSKEE DKHLKFRISH ELESASSEVN
Osteopontin is an arginine-glycine-aspartic acid (RGD)-containing glycoprotein that interacts with integrins and CD44 as major receptors. It is a multifunctional protein involved in bone mineralization, cell adhesion, cell migration, chronic inflammatory disease and transformation. Proteolytic cleavage by thrombin and matrix metalloproteinases close to the integrin-binding Arg-Gly-Asp sequence modulates the function of OPN and its integrin binding properties. Thrombin-cleaved fragments of Osteopontin are overexpressed in malignant glial tumors and provide a molecular niche with survival advantage and provide a novel substrate for plasmin and cathepsin D.
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Protein Aliases: 2AR; 44 kDa bone phosphoprotein; Bone sialoprotein 1; Calcium oxalate crystal growth inhibitor protein; early T-lymphocyte activation 1; Early T-lymphocyte activation 1 protein; HGNC:11255; MGC110940; Minopontin; Nephropontin; Osteopontin; osteopontin-like protein; osteopontin/immunoglobulin alpha 1 heavy chain constant region fusion protein; Secreted phosphoprotein 1; secreted phosphoprotein 1 (osteopontin, bone sialoprotein I, early T-lymphocyte activation 1); secreted phosphoprotein 1 variant 6; SPP-1; SPP1/CALPHA1 fusion; urinar; Urinary stone protein; Uropontin
Gene Aliases: 2AR; Apl-1; BNSP; Bsp; BSPI; Eta; ETA-1; OP; OPN; Opnl; PSEC0156; Ric; Spp-1; SPP1
Molecular Function: cytokine