Anti-Human CD244 Functional Grade Purified

Description: The eBioC1.7 monoclonal antibody reacts with human CD244 (2B4, p38). In human, CD244 is a 38 kDa protein expressed on NK cells, a subset of CD8+ T cells, γδ T cells, monocytes, basophils and eosinophils. Binding of the CD244 ligand, CD48, results in NK cell activation, unlike mouse CD244, which is an inhibitory receptor. For CD244 expressed on NK cells, binding of CD48 results in enhanced NK cell cytotoxicity and secretion of IFN-γ. Recently, it was demonstrated that binding of the C1.7 monoclonal antibody and CD48 involve the same residue in the V domain of human CD244, which explains the ability of C1.7 binding to induce activation of NK cells. Binding of C1.7 to CD244 leads to tyrosine phosphorylation and recruitment of the adaptor molecule SAP (SLAM-associated protein). Patients with X-linked lymphoproliferative disorder (XLPD) have a mutation in SAP which renders it unable to bind to phosphorylated CD244.

References: Valiante NM, Trinchieri G. Identification of a novel signal transduction surface molecule on human cytotoxic lymphocytes.J Exp Med. 1993 Oct 1;178(4):1397-406. (C1.7, mAb development, FC, FA, WB, PubMed)

Chuang SS, Kim MH, Johnson LA, Albertsson P, Kitson RP, Nannmark U, Goldfarb RH, Mathew PA. 2B4 stimulation of YT cells induces natural killer cell cytolytic function and invasiveness.Immunology. 2000 Jul;100(3):378-83. (C1.7, FC, FA, PubMed)

Mathew SO, Kumaresan PR, Lee JK, Huynh VT, Mathew PA. Mutational analysis of the human 2B4 (CD244)/CD48 interaction: Lys68 and Glu70 in the V domain of 2B4 are critical for CD48 binding and functional activation of NK cells.J Immunol. 2005 Jul 15;175(2):1005-13. (C1.7, FC, PubMed)

van Emmerik NE, Knoop CJ, Vaessen LM, Balk AH, Mochtar B, Claas FH, Weimar W. C1.7 monoclonal antibody designates high-avidity CD4+ cytotoxic T lymphocytes involved in clinical heart rejection.Transplantation. 1998 Jul 15;66(1):135-8. (C1.7, FC, PubMed)