Mouse Cyclic ADP-Ribose Hydrolase 2 (BST1) Protein

Background

BST1, also known as bone marrow stromal cell antigen 1 or CD157, is a multifunctional glycoprotein involved in immune signaling, cell adhesion, and calcium signaling. BST1 is part of the ADP-ribosyl cyclase family, which also includes CD38, another NAD-glycohydrolase enzyme involved in immune and calcium signaling. It is encoded by the BST1 gene located on chromosome 4p15 in humans and is predominantly expressed in bone marrow stromal cells, but also in peripheral immune cells, endothelial cells, and various tissues with immune functions. BST1 is also identified as a GPI (glycosylphosphatidylinositol)-anchored protein, which enables it to be tethered to cell membranes, facilitating cell-cell interactions and intracellular signaling. This protein is highly relevant in immunology, given its involvement in cellular processes associated with immune responses and inflammation.