Human IL18BP HEK293 Overexpression Lysate: Product Information
This Human IL18BP overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of IL18BP protein (Cat: 10357-H03H) from the overexpression lysate was verified.
A DNA sequence encoding the N-terminal domain (Met 1-Gly 192) of human IL 18BPa (NP_001034748.1) was fused with the C-terminal polyhistidine-tagged Fc region of human IgG1 at the C-terminus.
The recombinant human IL18BPa/Fc is a disulfide-linked homodimeric protein after removal of the signal peptide. The reduced monomer consists of 411 amino acids and has a predicted molecular mass of 44.5 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rh IL18BPa/Fc monomer is approximately 70-75 kDa due to glycosylation.
Human IL18BP HEK293 Overexpression Lysate: Usage Guide
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.
1. Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube.
2. Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Western Blot (WB) Optimal dilutions/concentrations should be determined by the end user.
Human IL18BP HEK293 Overexpression Lysate: Synonyms
Human IL18BPa Overexpression Lysate
IL18BP Background Information
Interleukin-18-binding protein (IL-18BP) is a constitutively expressed and secreted protein. IL-18BP is a cytokine receptor that belongs to the interleukin 1 receptor family. This receptor specifically binds interleukin 18 (IL18), and is essential for IL18 mediated signal transduction. IFN-alpha and IL12 are reported to induce the expression of this receptor in NK and T cells. This gene along with four other members of the interleukin 1 receptor family, including IL1R2, IL1R1, ILRL2 (IL-1Rrp2), and IL1RL1 (T1/ST2), form a gene cluster on chromosome 2q. The adjacently located family members IL18 Receptor 1 (IL18R1) and IL18 receptor accessory protein (IL18RAP) may also be important in the development of asthma and atopy. IL-18 binding protein (IL-18BP) was only moderately elevated, resulting in a high level of biologically active free IL-18 in HPS. A severe IL-18/IL-18BP imbalance results in Th-1 lymphocyte and macrophage activation, which escapes control by NK-cell cytotoxicity and may allow for secondary HPS in patients with underlying diseases.
interleukin 18 binding protein
IL1 signaling pathway
Novick D, et al.. (2001) A novel IL-18BP ELISA shows elevated serum IL-18BP in sepsis and extensive decrease of free IL-18. Cytokine. 14(6): 334-42.
Mazodier K, et al.. (2005) Severe imbalance of IL-18/IL-18BP in patients with secondary hemophagocytic syndrome. Blood. 106(10): 3483-9.
Akira S. (2000) The role of IL-18 in innate immunity. Curr Opin Immunol. 12(1): 59-63.
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