Recombinant Human IL-4R alpha Fc Biotinylated Protein, CF New

Catalog #: BT7700 Datasheet / COA / SDS

Fc Chimera

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BT7700-050

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Biotinylated Recombinant Human IL-4R alpha Fc Chimera Protein Binding Activity.

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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human IL-4R alpha Fc Biotinylated Protein, CF Summary

R&D Systems HEK293-derived Recombinant Human IL-4R alpha Fc Biotinylated Protein (BT7700)
Quality control testing to verify active proteins with lot specific assays by in-house scientists
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Product Specifications

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

Activity

Measured by its binding ability in a functional ELISA. Biotinylated Recombinant Human IL-4R alpha Fc Chimera binds to Recombinant Human IL-4 Protein (Catalog # 204-IL) with an ED₅₀ of 0.100‑1.00 μg/mL.

Source

Human embryonic kidney cell, HEK293-derived human IL-4R alpha protein

Human IL-4R alpha (Gly24-His 232) Accession # P24394.1	IEGRMD	Human IgG₁ (Pro100-Lys330)
N-terminus		C-terminus

N-terminal Sequence
Analysis

Gly24

Structure / Form

Disulfide-linked homodimer

Biotinylated via amines

Predicted Molecular Mass

51 kDa

SDS-PAGE

55-85 kDa, under reducing conditions.

Product Datasheets

BT7700

Product Datasheet

COA

SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

BT7700

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution	Reconstitute at 250 μg/mL in water.
Shipping	The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 °C as supplied. 1 month, 2 to 8 °C under sterile conditions after reconstitution. 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

Binding Activity

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Measured by its binding ability in a functional ELISA. Biotinylated Recombinant Human IL-4R alpha Fc Chimera Protein (Catalog # BT7700) binds to Recombinant Human IL-4 Protein (204-IL) with an ED₅₀ of 0.100‑1.00 μg/mL.

SDS-PAGE

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2 μg/lane of Biotinylated Recombinant Human IL-4R alpha Fc Chimera Protein (Catalog # BT7700) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 55-85 kDa, and 110-170 kDa, respectively.

Reconstitution Calculator

Background: IL-4R alpha

Interleukin 4 Receptor alpha (IL-4 Ra), also known as CD124 and BSF receptor, is a widely expressed 140 kDa transmembrane glycoprotein in the class I cytokine receptor family. IL-4 Ra plays an important role in Th2-biased immune responses, alternative macrophage activation, mucosal immunity, allergic inflammation, tumor progression, and atherogenesis (1-5). Mature human IL-4 Ra consists of a 207 amino acid (aa) extracellular domain (ECD) that contains a cytokine binding region and one fibronectin type III domain, a 24 aa transmembrane segment, and a 569 aa cytoplasmic domain that contains one Box 1 motif and one ITIM motif (6, 7). Within the ECD, human IL-4 Ra shares 51% aa sequence identity with mouse and rat IL-4 Ra. Soluble forms of IL-4 Ra, generated by alternate splicing or proteolysis, retain ligand binding properties and inhibit IL-4 bioactivity (8-11). IL-4 Ra is a component of two distinct receptor complexes and shows species selectivity between human and mouse (6). It can associate with the common gamma chain ( gamma c) to form the IL-4 responsive type I receptor in which gamma c increases the affinity for IL-4 and enables signaling (12, 13). It can alternatively associate with IL-13 Ra1 to form the type II receptor which is responsive to both IL-4 and IL-13 (14, 15). The use of shared receptor components contributes to the overlapping biological effects of IL-4 and IL-13 as well as other cytokines that utilize gamma c (i.e. IL-2, IL-7, IL-9, IL-15, and IL-21) (16, 17).

References

Wills-Karp, M. and F.D. Finkelman (2008) Sci. Signal. 1:pe55.
Gordon, S. and F.O. Martinez (2010) Immunity 32:593.
Kuperman, D.A. and R.P. Schleimer (2008) Curr. Mol. Med. 8:384.
Li, Z. et al. (2009) Cell. Mol. Immunol. 6:415.
Lee, Y.W. et al. (2010) Biomol. Ther. 18:135.
Idzerda, R.L. et al. (1990) J. Exp. Med. 171:861.
Galizzi, J.P. et al. (1990) Int. Immunol. 2:669.
Kruse, S. et al. (1999) Int. Immunol. 11:1965.
Blum, H. et al. (1996) J. Immunol. 157:1846.
Jung, T. et al. (1999) Int. Arch. Allergy Immunol. 119:23.
Mosley, B. et al. (1989) Cell 59:335.
Kondo, M. et al. (1993) Science 262:1874.
Russell, S.M. et al. (1993) Science 262:1880.
Hilton, D.J. et al. (1996) Proc. Natl. Acad. Sci. 93:497.
Aman, M.J. et al. (1996) J. Biol. Chem. 271:29265.
Ramalingam, T.R. et al. (2008) Nat. Immunol. 9:25.
Overwijk, W.W. and K.S. Schluns (2009) Clin. Immunol. 132:153.

Long Name

Interleukin 4 Receptor alpha

Entrez Gene IDs

3566 (Human); 16190 (Mouse); 102133649 (Cynomolgus Monkey)

Alternate Names

CD124 antigen; CD124; IL-4 R alpha; IL-4 receptor subunit alpha; IL4R alpha; IL-4R alpha; IL-4R subunit alpha; IL4R; IL-4Ra; IL4RACD124; IL-4R-alpha; interleukin 4 receptor; interleukin-4 receptor alpha chain; interleukin-4 receptor subunit alpha