CD137, also known as TNFRSF9 or 4-1BB, is an inducible costimulatory molecule expressed mainly on activated T cells. Its ligand, known as 4-1BBL, is expressed on activated macrophages, mature B cells, hematopoietic stem cells, and myeloid progenitor cells. CD137 signaling leads to maintaining the survival of activated T cells and CD8+ memory T cells, and clonal expansion of T cells, but also to suppressing myelopoiesis and dendritic cell development. Triggered CD137 induces a cytokine release profile regulating peripheral monocyte survival. Soluble forms of CD137 may provide negative control mechanism for some immune responses.
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Protein Aliases: 4 1 BB; 4-1BB ligand receptor; 41BB; CD137; CD137 antigen; CDw137; homolog of mouse 4-1BB; induced by lymphocyte activation (ILA); interleukin-activated receptor, homolog of mouse Ly63; receptor protein 4-1BB; s4 1 BB; s4 1BB; s41BB; sCD137; soluble 4 1 BB; soluble 4 1BB; soluble 41BB; soluble CD137; T cell antigen ILA; T-cell antigen 4-1BB homolog; T-cell antigen ILA; Tumor necrosis factor receptor superfamily member 9; tumor necrosis factor receptor superfamily, member 9
Gene Aliases: 4-1BB; CD137; CDw137; ILA; TNFRSF9
UniProt ID: (Human) Q07011
Entrez Gene ID: (Human) 3604
Molecular Function: transmembrane signal receptor