AdipoGen Life Sciences

IL-33 (oxidation resistant) (human) (rec.) (His)

CHF 300.00
In stock
AG-40B-0167-C01010 µgCHF 300.00
AG-40B-0167-C100100 µgCHF 1'080.00
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Product Details
Synonyms IL-33 (human) (C208S / C227S / C232S / C259S Mutant); Interleukin-33 (human) (C208S / C227S / C232S / C259S Mutant); IL-1F11; NF-HEV
Product Type Protein
Source/Host E. coli

Human IL-33 (aa 112-270) is fused at the C-terminus to a His-tag. Amino acids C208, C227, C232 and C259 have been mutated to serine to protect IL-33 from oxidation.

Crossreactivity Human

Binds to human and mouse ST2.

Biological Activity

Activates human and mouse ST2-dependent NF-κB pathway.

MW ~17kDa
Purity ≥95% (SDS-PAGE)
Endotoxin Content <0.01EU/μg purified protein (LAL test).
Concentration After reconstitution:
for 10µg size: 0.1mg/ml
for 100µg size: 1mg/ml
Reconstitution Reconstitute with 100μl sterile water.
Formulation Lyophilized. Contains PBS.
Other Product Data

UniProt link Q2YEJ5: Interleukin-33 (human)

Shipping and Handling
Shipping BLUE ICE
Short Term Storage +4°C
Long Term Storage -20°C
Handling Advice After reconstitution, prepare aliquots and store at -20°C.
Avoid freeze/thaw cycles.
Centrifuge lyophilized vial before opening and reconstitution.
PBS containing at least 0.1% BSA should be used for further dilutions.
Use/Stability Stable for at least 6 months after receipt when stored at -20°C.
Working aliquots are stable for up to 3 months when stored at -20°C.
MSDS Download PDF
Product Specification Sheet
Datasheet Download PDF

Interleukin-33 (IL-33; HF-NEV; IL-1F11), a member of the IL-1 family of cytokines, is expressed by many cell types following pro-inflammatory stimulation and is thought to be released upon cell lysis. IL-33 binds to and signals through ST2 (IL-1R1) and its stimulation recruits MYD88, IRAK, IRAK4 and TRAF6, followed by phosphorylation of ERK1 (MAPK3) / ERK2 (MAPK1), p38 (MAPK14) and JNK. The ability of IL-33 to target numerous immune cell types, like Th2-like cells, mast cells and B1 cells, and to induce cytokine and chemokine production underlines its potential in influencing the outcome of a wide range of diseases, such as arthritis, asthma, atopic allergy & anaphylaxis, cardiovascular disease/atherosclerosis, nervous system diseases and sepsis. IL-33 facilitates Treg expansion in vitro and in vivo. Recently, IL-33 has been involved in adipocyte differentiation. The biological activity of IL-33 at its receptor ST2 is rapidly terminated in the extracellular environment by its oxidation (formation of two disulfide bridges), resulting in an extensive conformational change that disrupts the ST2 binding site. Cysteines at amino acids C208, C227, C232 and C259 control IL-33 oxidation and mutations of two or more of these four cysteines protect IL-33 from oxidation and increase its activity.

Product References
  1. Oxidation of the alarmin IL-33 regulates ST2-dependent inflammation: E.S. Cohen, et al.; Nat. Commun. 6, ID8327 (2015)
  2. Tissue cytokine IL-33 modulates the cytotoxic CD8 T lymphocyte activity during nutrient deprivation by regulation of lineage-specific differentiation programs: C. Dreis, et al.; Front. Immunol. 10, 1698 (2019)
  3. PPARɣ drives IL-33-dependent ILC2 pro-tumoral functions: G. Ercolano, et al.; Nat. Commun. 12, 2538 (2021)
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