DDR1, also known as CAK, CD167a, RTK6, and TrkE, is a 120-140 kDa type I transmembrane glycoprotein that belongs to the discoidin-like domain containing subfamily of receptor tyrosine kinases. DDR1 is expressed on epithelial tissues, activated monocytes and neutrophils, and in several cancers.The discoidin-like domain mediates binding to collagens I-V. DDR1 selectively recognizes the triple helical structure of collagen. It is expressed on the cell surface as a dimer which can include different isoforms. DDR1 oligomerization enhances collagen binding and also modulates collagen fibrillogenesis. The transmembrane segment contains a leucine zipper and GxxxG motif, but neither is exclusively required for dimerization. Collagen binding induces prolonged autophosphorylation, including the NPxY motif. Collagen binding also results in the proteolytic cleavage of a tyrosine phosphorylated 60 kDa C-terminal fragment (CTF), and a 60 kDa ECD fragment. TIMP3 and TAPI-1 inhibit shedding of the ECD fragment but not the CTF. Specifications Synonyms HGK2; MCK-10; CAK; EDDR1; NEP; NTRK4; PTK3A; RTK6; TRKE; CD167a; EC 2.7.10.1 Uniprot No. Q08345.1 Source Recombinant Human DDR1 Protein is expressed from HEK293 Cells with His tag at the C-terminal. It contains Asp21-Ala417. Molecular Weight Approximately 45.1 kDa. Due to glycosylation, the protein migrates to 63-67 kDa based on Tris-Bis PAGE result. Purity > 95% as determined by SDS-PAGE and HPLC. Activity ELISA Data：Immobilized Human DDR1, His Tag at 0.5μg/ml (100μl/well) on the plate. Dose response curve for Anti-DDR1 Antibody, hFc Tag with the EC50 of 12.8ng/ml determined by ELISA. SPR Data：Human DDR1, His Tag captured on CM5 Chip via Anti-His Antibody can bind Native Human Collagen I protein with an affinity constant of 0.806 nM as determined in SPR assay (Biacore T200). Endotoxin < 1.0 EU per 1μg of the protein by the LAL method. Formulation Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization. Reconstitution Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/mL is recommended (usually we use 1 mg/mL solution for lyophilization). Dissolve the lyophilized protein in distilled water. Storage Transported with ice packs. Store at -20℃ to -80℃, valid for one year. After reconstitution, store unopened at -20 to -80°C for 3 to 6 months. After reconstitution, store at 2 to 8°C for 2 to 7 days. It is recommended to store in aliquots and freeze for the first use to avoid repeated freezing and thawing. Note 1. Avoid repeated freezing and thawing. 2. For your safety and health, please wear lab coat and disposable gloves when operating. 3. This product is for scientific research purposes only. Product Data
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