Recombinant Mouse Lymphotoxin Α1/Β2 Catalog Number: 9968-LY/CF
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Recombinant Mouse Lymphotoxin α1/β2 Catalog Number: 9968-LY/CF DESCRIPTION Source Mouse myeloma cell line, NS0derived mouse Lymphotoxin protein Mouse LT alpha Mouse LT beta Mouse LT beta (Lys59Leu202) GGGGS (Leu153Gly306) GGGGS (Leu153Gly306) Accession # P09225 Accession # P41155 Accession # P41155 Nterminal Sequence Lys59 Analysis Structure / Form GSlinked heterotrimer Predicted Molecular 50 kDa Mass SPECIFICATIONS SDSPAGE 4263 kDa, reducing conditions Activity Measured in a cell proliferation assay using NIH3T3 mouse embryonic fibroblast cells. The ED50 for this effect is 0.32.1 ng/mL Endotoxin Level <0.10 EU per 1 μg of the protein by the LAL method. Purity >95%, by SDSPAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining. Formulation Lyophilized from a 0.2 μm filtered solution in PBS. See Certificate of Analysis for details. PREPARATION AND STORAGE Reconstitution Reconstitute at 500 μg/mL in PBS. Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. Stability & Storage l 12 months from date of receipt, ≤ 20 °C as supplied. l 1 month, 2 to 8 °C under sterile conditions after reconstitution. l 3 months, ≤ 20 °C under sterile conditions after reconstitution. DATA Bioactivity SDSPAGE Recombinant Mouse 2 μg/lane of Recombinant Mouse Lymphotoxin alpha1/beta2 Lymphotoxin α1/β2 was resolved with SDSPAGE under reducing (R) and non (Catalog # 9968 reducing (NR) conditions and visualized by Coomassie® blue LY/CF) induces NIH staining, showing bands at 4263 kDa. 3T3 mouse embryonic fibroblast cell proliferation. The ED50 for this effect is 0.32.1 ng/mL. Rev. 6/26/2018 Page 1 of 2 Recombinant Mouse Lymphotoxin α1/β2 Catalog Number: 9968-LY/CF BACKGROUND Lymphotoxin alpha (LT alpha) and Lymphotoxin beta (LT beta) are proinflammatory TNF superfamily ligands that play important roles in immune system development (1, 2). Mouse LT alpha cDNA encodes a 202 amino acid (aa) secreted soluble protein with a 33 aa signal sequence. The mature mouse LT alpha shares 75% aa sequence identity with human LT alpha (3, 4). Mouse LT beta cDNA encodes a 306 aa type II membrane protein with a 27 aa Nterminal cytoplasmic domain, a 21 aa transmembrane region, and a 258 aa extracellular domain. It shares 73% aa sequence identity with human LT beta within common regions of their extracellular domains (5). Secreted LT alpha assembles as a soluble homotrimer, LT alpha 3. In addition, secreted LT alpha also complexes with the membrane associated LT beta to generate two types of heterotrimers, LT alpha 1/beta 2 and LT alpha 2/beta 1 (5). The soluble LT alpha 3 binds both TNF RI (p55) and TNF RII (p75). In contrast, the predominant membranebound heterotrimer, LT alpha 1/beta 2, binds only to the lymphotoxin beta receptor (LT beta R). LT alpha 2/beta 1 is capable of binding LT beta R, TNF RI (p55), and TNF RII (p75). LT plays a role in normal lymphoid organogenesis (6, 7). The LT alpha 1/beta 2 heterotrimer binds and activates the LT beta R/TNFRSF3 (LT beta R) which is expressed on macrophages, dendritic cells, hepatocytes, intestinal epithelial cells (IEC), follicular dendritic cells (FDC), and high endothelial venules (HEV) (2, 8, 9). LT beta R also serves as a receptor for LIGHT/TNFSF14 (10). LT alpha 1/beta 2 promotes the development of FDC networks and HEV in lymphoid tissue, the class switching of immature B cells for IgA production, and the production of homeostatic IL22 by ILCs (1114). It can be shed by ADAM17 or MMP8 mediated cleavage, and the released heterotrimer circulates in the serum and is elevated in synovial fluid of rheumatoid arthritis patients (15). References: 1. Lu, T.T. and J.L. Browning (2014) Front. Immunol. 5:47. 2. Upadhyay, V. and Y.X. Fu (2014) Cytokine Growth Factor Rev. 25:227. 3. Gray, P.W. et al. (1984) Nature 312:721. 4. Nedwin, G.E. et al. (1985) J. Cell Biochem. 29:171. 5. Browning, J.L. et al. (1993) Cell 72:847. 6. Ettinger R. et al. (1996) Proc. Natl. Acad. Sci. USA 93:13102. 7. Cuff, C.A. et al. (1998) J. Immunol. 161:6853. 8. Sudhamsu, J. et al. (2013) Proc. Natl. Acad. Sci. USA 110:19896. 9. Crowe, P.D. et al. (1994) Science 264:707. 10. Eldredge, J. et al. (2006) Biochemistry 45:10117. 11. Kruglov, A.A. et al. (2013) Science 342:1243. 12. Futterer, A. et al. (1998) Immunity 9:59. 13. Koni, P.A. et al. (1997) Immunity 6:491. 14. Ota, N. et al. (2011) Nat. Immunol. 12:941. 15. Young, J. et al. (2010) Cytokine 51:78. Rev. 6/26/2018 Page 2 of 2 .