Human IL-23 R Protein, His Tag

INTRODUCTION

QC & Assay Protocol

Citation & Background

Synonym
IL-23 R,IL-23 Receptor
Source
Human IL-23 R, His Tag (ILR-H52H4) is expressed from human 293 cells (HEK293). It contains AA Gly 24 - Gly 355 (Accession # Q5VWK5-1).
Predicted N-terminus: Gly 24
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Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 39.9 kDa. The protein migrates as 55-80 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Endotoxin
Less than 1.0 EU per μg by the LAL method.
Purity
>90% as determined by SDS-PAGE.

Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
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Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
No activity loss was observed after storage at:
1. 4-8^°C for 12 months in lyophilized state;
2. -70^°C for 3 months under sterile conditions after reconstitution.

SDS-PAGE

Human IL-23 R, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.

Bioactivity-SPR

Captured Biotinylated Human IL23A & IL12B, His Tag, Avi Tag (Cat. No. ILB-H82W6) on Biotin CAP - Series S sensor Chip can bind Human IL-23 R, His Tag (Cat. No. ILR-H52H4) affinity constant of 4.77 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

Request for protocol

Background
Interleukin 23 receptor (IL-23R) is a type I cytokine receptor, and IL-23R pairs with the receptor molecule IL12RB1/IL12Rbeta1, and both are required for IL23A signaling. Also, IL-23R associates constitutively with Janus kinase 2 (JAK2), and binds to transcription activator STAT3 in a ligand-dependent manner. Furthermore, IL-23R mediates T-cells, NK cells and possibly certain macrophage/myeloid cells stimulation probably through activation of the Jak-Stat signaling cascade. As for IL-23, it may be responsible for autoimmune inflammatory diseases and be important for tumorigenesis.
References
- (1) Parham C., et al., 2002, J. Immunol. 168:5699-5708.
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