Name :
Recombinant Human IL-18BP Protein (His Tag)
Biological Activity :
Background :
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.
Biological Activity :
1. Measured by its ability to bind biotinylated Cynomolgus IL18 in functional ELISA.2. Measured by its ability to inhibit the IL-18-induced response of KG‑1 human acute myelogenous leukemia cells. The ED50 for this effect is 0.05-0.35μg/mL in the presence of 50 ng/mL of recombinant human IL-18.
Expression Host :
Human
Source :
HEK293 Cells
Tag :
Protein Accession No. :
NP_001034748.1
NCBI Gene ID :
Synonyms :
Synonyms :
interleukin 18 binding protein
Amino Acid Sequence :
Molecular Weight :
The recombinant human IL18BPa consists of 175 amino acids and has a predicted molecular mass of 19 kDa.In SDS-PAGE under reducing conditions, the apparent molecular mass of human IL18BPa is approximately 40.3 kDa due to glycosylation.
Purity :
≥ 90 % as determined by SDS-PAGE
State of Matter :
Product Concentration :
Storage and Stability :
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Endotoxin Level :
< 1.0 EU per μg of the protein as determined by the LAL method
Protein Construction :
A DNA sequence encoding the human IL18BPa (NP_001034748.1) (Met1-Gly194) was expressed with the polyhistidine tag at the C-terminus.
Buffer Solution :
Lyophilized from sterile 50mM Tris, 100mM NaCl, pH 8.5.Please contact us for any concerns or special requirements. Normally 5 % – 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hardcopy of datasheet.
Shipping :
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Redissolution :
A hardcopy of datasheet with reconstitution instructions is sent along with the products. Please refer to it for detailed information.
Synonyms :
IL18BPa Protein, Human IL-18BP 背景信息 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.
References & Citations :
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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