This Mouse BST2 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of BST2 protein (Cat: 51043-M01H) from the overexpression lysate was verified.
A DNA sequence encoding the extracellular domain of mouse BST2 (Q8R2Q8) (Thr 52-Asn 151) was fused with the Fc region of human IgG1 at the N-terminus.
The recombinant mouse BST2/Fc is a disulfide-linked homodimer. The reduced monomer comprises 360 amino acids and has a calculated molecular mass of 40 kDa. The apparent molecular mass of the monomer is approximately 4-50 kDa in SDS-PAGE under reducing conditions.
Mouse BST2 HEK293 Overexpression Lysate: 使用指南
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
BST2 was frequently overexpressed in GC tissues compared with the adjacent non-tumorous tissues, and high BST2 expression was correlated with tumor stage and lymphatic metastasis. Furthermore, in vitro experiments demonstrated that knockdown of BST2 by siRNA inhibited cell proliferation, induced apoptosis and repressed cell motility in GC cells. In addition, the pro-tumor function of BST2 in GC was mediated partly through the NF-κB signaling. BST2 possesses the oncogenic potential in GC by regulating the proliferation, apoptosis, and migratory ability of GC cells, thereby BST2 could be a potential therapeutic target for the treatment of GC. IFN (interferon)-induced BST2 recruits the E3 ubiquitin ligase MARCH8 to catalyze the K27-linked ubiquitination of MAVS for CALCOCO2-directed autophagic degradation, hence inhibiting DDX58-mediated type I interferon signaling through a negative feedback loop. BST2 is a host protein with dual functions in response to viral infections: it traps newly assembled enveloped virions at the plasma membrane in infected cells, and it induces NF-κB activity, especially in the context of retroviral assembly. BST2 may induce or amplify proinflammatory signaling during Ebola virus infection, potentially contributing to the dysregulated cytokine response that is a hallmark of Ebola virus disease.
bone marrow stromal cell antigen 2
Ishikawa J, et al. (1995) Molecular cloning and chromosomal mapping of a bone marrow stromal cell surface gene, BST2, that may be involved in pre-B-cell growth. Genomics. 26 (3): 527-34.
Viswanathan K, et al. (2011) BST2/Tetherin enhances entry of human cytomegalovirus. PLoS Pathog. 7(11):e1002332.
Gifford RJ. (2011) No trespassing: ancient BST2 deletion confers protection against simian immunodeficiency virus infection of humans. Hum Mutat. 32(11).