Rat CD157 / BST1 Protein (His Tag)

BST1

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Catalog Number	P80351-R08H
Organism Species	Rat
Host	Human Cells
Synonyms	BST1
Molecular Weight	The recombinant rat BST1 comprises 276 amino acids and predicts a molecular mass of 31.2 kDa. The apparent molecular mass of the recombinant protein is approximately 38-42 kDa in SDS-PAGE under reducing conditions due to glycosylation.
predicted N	Ala 28
SDS-PAGE
Purity	> 90 % as determined by SDS-PAGE
Protein Construction	A DNA sequence encoding the rat BST1 (Q63072) (Met1-Glu293) was expressed, fused with a polyhistidine tag at the C-terminus.
Bio-activity
Research Area	Immunology |Cluster of Differentiation (CD) |B Cell CD Antigen
Formulation	Lyophilized from sterile PBS, pH 7.4 1. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
Background	The cluster of differentiation (CD) system is commonly used as cell markers in immunophynotyping. Different kinds of cells in the immune system can be identified through the surface CD molecules which associating with the immune function of the cell. There are more than 320 CD unique clusters and subclusters have been identified. Some of the CD molecules serve as receptors or ligands important to the cell through initiating a signal cascade which then alter the behavior of the cell. Some CD proteins do not take part in cell signal process but have other functions such as cell adhesion. CD157, also known as ADP-ribosyl cyclase 2, is an ectoenzyme sharing several characteristics with ADP-ribosyl cyclase CD38. CD157 was originally identified as a bone marrow stromal cell molecule (BST-1) with a glycosylphosphatidylinositol (GPI) anchor to bind to the cell surface. CD157 is prevalently expressed by cells of the myeloid lineage. CD157 could act as a receptor with signal transduction capability. Further, it regulates calcium homeostasis and promotes polarization in neutrophils and mediates superoxide (O2−) production in the human U937 myeloid line.
Reference	Zola H, et al. (2007) CD molecules 2006-human cell differentiation molecules. J Immunol Methods. 318 (1-2): 1-5. Ho IC, et al. (2009) GATA3 and the T-cell lineage: essential functions before and after T-helper-2-cell differentiation. Nat Rev Immunol. 9 (2): 125-35. Matesanz-Isabel J, et al. (2011) New B-cell CD molecules. Immunology Letters.134 (2): 104-12. Malavasi F, et al. (2006) CD38 and CD157 as Receptors of the Immune System: A Bridge Between Innate and Adaptive Immunity. Molecular Medicine. 12 (11-12): 334-41. Ortolan E, et al. (2002) CD157, the janus of CD38 but with a unique personality. Cell Biochemistry and Function. 20 (4): 309-22.