• Purity

  >95%, by SDS-PAGE under reducing conditions and visualized by silver stain

• Endotoxin Level

  <0.01 EU per 1 μg of the protein by the LAL method.  

• Activity

  Measured by its ability to bind rmIL-17B R/Fc Chimera in a functional ELISA.

• Source

  E. coli-derived Ala25-Arg205

• Accession #

• N-terminal Sequence    
  Analysis

  Ala25

• Structure / Form

  Disulfide-linked homodimer

• Predicted Molecular Mass

  20 kDa (monomer)

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.

Background: IL-17D

The Interleukin 17 (IL-17) family proteins, comprising six members (IL-17, IL-17B through IL-17F), are secreted, structurally related proteins that share a conserved cysteine-knot fold near the C-terminus, but have considerable sequence divergence at the N-terminus (1, 2, 6). With the exception of IL-17B, which exists as a non-covalently linked dimer, all IL-17 family members are disulfide-linked dimers (3). IL-17 family proteins are pro-inflammatory cytokines that induce local cytokine production and are involved in the regulation of immune functions (1, 2, 6). Two receptors (IL-17 R, and IL-17B R), which are activated by IL-17 family members, have been identified. In addition, at least three additional orphan type I transmembrane receptors with homology to IL-17 R, including IL-17 RL (IL-17 RC), IL-17 RD, and IL-17 RE, have also been reported (1 - 6). Mouse IL-17D is synthesized as a 205 amino acid (aa) precursor that contains a putative 24 aa signal peptide and a 181 aa mature segment. The mature region contains two potential N-linked glycosylation sites and eight cysteines, four of which are involved in the formation of a modified cysteine-knot motif (5). The molecule is reported to exist as a 53 kDa disulfide-linked homodimer (2, 5). Given that its predicted homodimeric molecular weight is 40 kDa, the molecule is presumably glycosylated. In the mature region, mouse IL-17D is 88% aa identical to human IL-17D. There is less than 30% aa identity between mouse IL-17D and other members of the mouse IL-17 family. IL-17D is expressed in skeletal muscle, adipose tissue, fetal liver, and heart, plus resting CD4⁺ T cells and CD19⁺ B cells (1). R&D Systems has shown IL-17D binding to a mouse IL-17 R/Fc construct in a functional ELISA. IL-17D is known to induce the production of IL-8, IL-6 and GM-CSF (5).

• References:

1. Aggarwal, S. and A.L. Gurney (2002) J. Leukoc. Biol. 71:1.

2. Moseley, T.A. et al. (2003) Cytokine & Growth Factor Rev. 14:155.

3. Hymowitz, S.G. et al. (2001) EMBO J. 20:5332.

4. Haudenschild, D. et al. (2002) J. Biol. Chem. 277:4309.

5. Starnes, T. et al. (2002) J. Immunol. 169:642.

6. Kolls, J.K. and A. Linden (2004) Immunity 21:467.

• Long Name:

  Interleukin 17D

• Entrez Gene IDs:

  53342 (Human); 239114 (Mouse)

• Alternate Names:

  FLJ30846; IL17D; IL-17D; IL-17Dinterleukin 27; IL-22; IL-27interleukin-17D; IL27interleukin-27; interleukin 17D; Interleukin-27