General Notes
Mouse anti Human CD150 antibody, clone SLAM.4 recognizes CD150 also known as signaling lymphocyte activation molecule (SLAM), is a member of the immunoglobulin superfamily. CD150 is expressed in dendritic cells, Natural Killer (NK) cells, B and T cells (Bhattocharjee and Yadava 2018). CD150 is a membrane phosphoglycoprotein which contains 2 extracellular domains corresponding to a variable and constant region, a general feature of the Ig superfamily (Cocks et al. 1995). CD150 also has a cytoplasmic domain which contains 3 unique tyrosine motifs with a conserved TxYxxV sequence. This tyrosine motif is the binding domain for SLAM-associated protein (SAP) which form a complex together (Sayos et al 1998, Poy et al. 1999). This complex plays a role in the regulation of Natural killer (NK) and T cell development. Mutations to SAP in humans results in X-linked lymphoproliferative disease which is a fatal immunological disorder (Coffey et al. 1998). Activation of CD150 co-activates T- or B-lymphocytes responses and plays a role in bidirectional T-B cell stimulation (Carballido et al. 1997). It can also regulate NK and T cell development, B cell regulation and antibody production/isotype switching (Veillette 2006). CD150 is also the receptor that the measles virus recognizes (Tatsuo et al. 2000). The SLAM.4 clone has been used in flow cytometry to analyze the cell distribution of CD150 on leucocytes and lymphocytes as well as to distinguish between subsets of CD4+ and CD8+ T lymphocytes (Romero et al. 2001).
