CD58 Protein, Human (HEK293, Fc)

CD58, a glycoprotein, also known as lymphocyte-function antigen 3 (LFA-3). CD58 is a costimulatory receptor, and is distributed on various human tissue cells, such as T lymphocytes, NK cells, thymocytes, and a subset of bone marrow cells. CD58 can interact with its natural ligand (CD2, primarily expressed on the surface of T/NK cells). The CD2-CD58 interaction can promote cell adhesion and recognition, and regulate antiviral responses, inflammatory responses in autoimmune diseases, immune rejection of transplantation, and immune evasion of tumor cells^[1].
CD58 has two isoforms: a type-I transmembrane form and a glycosylphosphatidylinositol (GPI)-anchored form. The GPI-anchored CD58 form is more effective in enhancing adhesion, but the transmembrane form is more critical for signal transduction. Furthermore, a soluble form of CD58 (sCD58) also exist in cellular supernatant in vitro and in local tissues in vivo. sCD58 is an immunosuppressive factor, and is involved in T/NK cell-mediated immune responses by affecting CD2-CD58 interaction. Altered accumulation of sCD58 may lead to immunosuppression of T/NK cells in the tumor microenvironment. Therefore, sCD58 as a novel immunotherapeutic target^[1].