Recombinant Mouse Tnfrsf9 Protein (Fc Tag)

CD137 (also known as 4-1BB) is a surface co-stimulatory glycoprotein originally described as present on activated T lymphocytes, which belongs to the tumor necrosis factor (TNF) receptor superfamily. It is expressed mainly on activated CD4+ and CD8+ T cells, and binds to a high-affinity ligand (4-1BBL) expressed on several antigen-presenting cells such as macrophages and activated B cells. Upon ligand binding, 4-1BB is associated with an the tumor necrosis factor receptor–associated factors (TRAFs), the adaptor protein which mediates downstream signaling events including the activation of NF-kappaB and cytokine production. 4-1BB signaling either by binding to 4-1BBL or by antibody ligation delivers signals for T-cell activation and growth, as well as monocyte proliferation and B-cell survival, and plays an important role in the amplification of T cell-mediated immune responses. In addition, CD137 and CD137L are expressed in different human primary tumor tissues, suggesting that they may influence the progression of tumors. Crosslinking of CD137 on activated T cells has shown promise in enhancing anti-tumor immune responses in murine models, and agonistic anti-CD137 antibodies are currently being tested in phase I clinical trials. Soluble forms of CD137 (sCD137) are generated by differential splicing. sCD137 can bind to CD137 ligand to antagonize the costimulatory activities of the membrane-bound CD137 and reduce T cell proliferation and IL-2 secretion.

4 1BB;4 1BB ligand receptor;4-1BB ligand receptor;4-1BB Ligand Receptor T Cell;4-1BB; mouse; homolog of; Antigen 4-1BB Homolog; CD 137; CD137; CD137 antigen; CDw137; HLDA VI; Homolog of mouse 4 1BB; ILA; induced by lymphocyte activation; ILA; Induced by lymphocyte activation; Interleukin activated receptor homolog of mouse Ly63; Ly63; mouse; homolog of; MGC2172; OTTHUMP00000044294; Receptor protein 4 1BB; T cell antigen 4 1BB homolog; T cell antigen ILA; T-cell antigen 4-1BB homolog; T-cell antigen ILA; TNF receptor superfamily member 9; TNFRSF9; TNR9; Tumor necrosis factor receptor superfamily member 9

Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.