CST, 59028S, Phospho-CXCR4 (Ser339) Antibody

Polyclonal Antibody for studying CXCR4 (Ser339) phosphate. Validated for Western Blotting. Highly specific and rigorously validated in-house, Phospho-CXCR4 (Ser339) Antibody (CST #59028) is ready to ship. Product Usage Information Western Blotting: 1:1000 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting Specificity / Sensitivity Phospho-CXCR4 (Ser339) Antibody recognizes endogenous levels of CXCR4 protein only when phosphorylated at Ser339. This antibody does not cross-react with CXCR4 protein when phosphorylated at Ser324 or Ser325. Species Reactivity: Human Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser339 of human CXCR4 protein. Antibodies are purified by protein A and peptide affinity chromatography. Background CXCR4 is a chemokine receptor that belongs to the G protein-coupled receptor family. It is activated by a small cytokine, CXCL12, also known as stromal cell derived factor 1 (SDF1) (1). The main function of CXCR4 is the mediation of the homing of progenitor cells in the bone marrow and their recruitment to sites of injury (2). More recently, CXCR4 has been studied as a potential therapeutic target in the context of autoimmune diseases (3), as well as cancer, as the receptor is involved in the regulation of migration, proliferation, and survival of cancer cells (4). CXCR4 is phosphorylated at Ser339 by G protein-coupled receptor kinase 6 upon treatment of cells with CXCL12 (5). Phosphorylation of CXCR4 at Ser339 has also been observed following epidermal growth factor and phorbol ester treatment (6). TCR-mediated transactivation of CXCR4 at Ser339 activates a PREX1-Rac1-signaling pathway that stabilizes interleukin-2, -4, and -10 messenger RNA transcripts (7). Alternate Names C-X-C chemokine receptor type 4; C-X-C motif chemokine receptor 4; CD184; CD184 antigen; chemokine (C-X-C motif) receptor 4; CXC-R4; CXCR-4; CXCR4; D2S201E; FB22; Fusin; HM89; HSY3RR; LAP-3; LAP3; LCR1; LESTR; Leukocyte-derived seven transmembrane domain receptor; leukocyte-derived seven-transmembrane-domain receptor; lipopolysaccharide-associated protein 3; LPS-associated protein 3; neuropeptide Y receptor Y3; neuropeptide Y3 receptor; NPY3R; NPYR; NPYRL; NPYY3R; SDF-1 receptor; seven transmembrane helix receptor; seven-transmembrane-segment receptor, spleen; Stromal cell-derived factor 1 receptor; WHIM; WHIMS Specification REACTIVITY: H SENSITIVITY: Endogenous MW (kDa): 45-60 SOURCE: Rabbit