Anti-DR4/CD261 Antibody, clone DJR1

Tumor necrosis factor receptor superfamily member 10A (UniProt: O00220; also known as Death receptor 4, TNF-related apoptosis-inducing ligand receptor 1, TRAIL receptor 1, TRAIL-R1, CD261) is encoded by the TNFRSF10A (also known as APO2, DR4, TRAILR1) gene (Gene ID: 8797) in human. CD261/DR4 is a single-pass type I membrane protein, which is synthesized with a signal peptide (aa 1-23) that is subsequently cleaved off to produce the mature protein that contains an extracellular domain (aa 24-239), a transmembrane domain (aa 240-262), and a cytoplasmic domain (aa 263-468). It is widely expressed with high levels observed in spleen, peripheral blood leukocytes, small intestine, and thymus. TRAIL receptors (DR4 and DR5) induce apoptosis via caspase activation. The adapter molecule FADD is reported to recruit caspase-8 to the activated receptor. The resulting death-inducing signaling complex (DISC) performs caspase-8 proteolytic activation that initiates the subsequent cascade of caspases mediating apoptosis. O-GlcNAcylation of DR4 is reported to be crucial for TRAIL death signaling. Both TRAIL-sensitive and TRAIL-resistant breast cancer cell lines can be efficiently killed by overexpression of the CD261/DR4. However, the extent of cell death depends on the strength of the promoter driving DR4 expression. (Ref.: Lee, H., et al. (2019). Cancer Res. 79; 2839-2852; Kazhdan, I., and Marciniak, RA (2004). Cancer Gene Ther. 11(10); 691-698).

Clone DJR1 is a mouse monoclonal antibody that detects DR4/CD261. It targets an epitope within the extracellular domain.

Recombinant fragment corresponding to the extracellular domain of human DR4/CD261 Fc fusion protein.

Quality Control Applications

Evaluated by Flow Cytometry in BHK cells transfected with Human DR4.

Flow Cytometry Analysis: 1.0 µg of this antibody detected DR4/CD261 in BHK cells transfected with Human DR4.

Tested applications

Flow Cytometry: A representative lot detected DR4/CD261 in Flow Cytometry applications (Uno, K., et al. (2003). Blood. 101(9); 3658-67; Lee, H., et al. (2019). Cancer Res. 79(11); 2839-2852).

Note: Actual optimal working dilutions must be determined by end user as specimens, and experimental conditions may vary with the end user.

Purified mouse monoclonal antibody IgG1 in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Recommended storage: +2°C to +8°C.

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

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