AdipoGen Life Sciences

IL-37 (human) (monomeric):Fc-KIH (human) (rec.)

CHF 450.00
In stock
AG-40B-0221-C01010 µgCHF 450.00
AG-40B-0221-30103 x 10 µgCHF 900.00
AG-40B-0221-C100100 µgCHF 1'900.00
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Product Details
Synonyms IL-37 (human) (monomeric):Fc Knobs-into-Holes (human) (rec.); Interleukin-1 Family Member 7; IL-1F7; FIL1 zeta; IL-1X; Interleukin-1 Homolog 4; IL-1H4; Interleukin-1 zeta; IL-1 zeta; IL-1RP1; IL1F7; FIL1Z, IL1H4, IL1RP1
Product Type Protein
Source/Host HEK 293 cells. Produced using animal component-free medium.

Human IL-37 (aa 46-218) (Δ5CysS-S and Y85A) (see reference: A. Bujotzek, et al. 2022) is fused at the C-terminus to a Fc (human) IgG1 (Knobs-into-Holes technology) (see reference: J.B. Ridgway, et al.; Protein Eng. 9, 617 (1996)).

Crossreactivity Human

Shown to have anti-inflammatory activity.


Works in human and mouse models.

MW ~55kDa and 28kDa (SDS-PAGE); ~90 kDa (Monomer) (SEC)
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 100 µl endotoxin-free water.
Formulation Lyophilized. Contains PBS.
Protein Negative Control

Fc-KIH (human) IgG1 Control (rec.) (Prod. No. AG-35B-0015)

Other Product Data

NCBI link NP_055254: IL-37 (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 1 year 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

IL-37 (IL-1F7; IL-1H4) is an IL-1 family member that is expressed only in certain types of human organs and cells such as heart, thymus, testis, kidney, mononuclear cells (PBMCs) and dendritic cells. IL-37 is a soluble and secreted cytokine of 218 residues that shares the β-trefoil fold common to IL-1 family cytokines. But IL-37 is an atypical member of the IL-1 family of cytokines as it functions to inhibit many of the major pathways of innate and adaptive immunity and inflammation. It binds to the interleukin-18 receptor (IL-18R) and its co-receptor SIGIRR. IL-37 is secreted as a full-length and as a processed form starting from amino acid Val46 and assembles into an activity-limiting dimer with a dimerization constant in the nanomolar range. IL-37 mutations that lock the cytokine into its monomeric conformation (e.g. Y85A and D73K) are more active at blocking inflammation than wild-type dimer-forming IL-37 in a broad range of in vitro and in vivo activity assays. IL-37 also inhibited Lipopolysaccharide (LPS)-induced immunological reaction and LPS-induced osteoclast formation and bone resorption.

IL-37 (human) (monomeric):Fc-KIH (human) (rec.) (Prod. No. AG-40B-0221) is a new recombinant monomeric IL-37 produced in mammalian cells that has enhanced stability and activity compared to the classical human recombinant IL-37 produced in bacteria. This monomeric IL-37 protein is produced by using two different vectors, one encoding for the IL-37 (monomeric):Fc Knobs sequence (synthesizing a protein of 50kDa) and one encoding for the Fc Holes sequence (synthesizing a protein of 28kDa). Both vectors transfected into HEK293 cells produce both Fc molecules (Knobs-into-Holes technology; J.B. Ridgway, et al.; Protein Eng. 9, 617 (1996)) required for dimerization and for secretion of the final protein IL-37 (human) (monomeric):Fc-KIH (human) (rec.).

InVivoKines™ are a new generation of recombinant fusion proteins for immunotherapeutic, preclinical and translational in vivo research, developed and manufactured by AdipoGen Life Sciences.

Product References
  1. Protein engineering of a stable and potent anti-inflammatory IL-37-Fc fusion with enhanced therapeutic potential: A. Bujotzek, et al.; Cell Chemical Biol. 29, 1 (2022)
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