Recombinant Mouse IL-24 (NS0-expressed) Protein Summary
Details of Functionality
Measured in a cell proliferation assay using BaF3 mouse pro‑B cells transfected with human IL-20 R alpha and human IL-20 R beta . The ED50 for this effect is 0.07-0.35 ng/mL.
Source
Mouse myeloma cell line, NS0-derived mouse IL-24 protein Gln66-Leu220
Gln66 predicted: No results obtained, sequencing might be blocked
Protein/Peptide Type
Recombinant Proteins
Gene
Il24
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
18 kDa (monomer). Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
19‑23 kDa, reducing conditions
Publications
Read Publications using 7807-ML in the following applications:
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.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Mouse IL-24 (NS0-expressed) Protein
C49A
FISP
IL10B
IL24
IL-24
interleukin 24
MDA-7
MDA7MOB5
melanocyte-associated Mda-7
melanoma differentiation association protein 7
Melanoma differentiation-associated gene 7 protein
MOB-5
ST16
ST16interleukin-24
suppression of tumorigenicity 16 (melanoma differentiation)
Suppression of tumorigenicity 16 protein
Background
Interleukin 24 (IL-24), also known as FISP (IL-4 induced secreted protein) in mouse, and mda-7 (melanoma differentiation associated gene‑7) in humans, is a member of the IL-10 family of helical cytokines (1-3). The mouse IL-24 gene encodes for a 181 amino acid (aa) precursor that includes a 26 aa signal sequence and an 18 kDa (predicted), 155 aa mature segment (4). Unlike mature human IL-24, which contains three potential N-linked glycosylation sites, mouse mature IL-24 has only one. In human, both glycosylation and the presence of an intrachain disulfide bond have been found to be necessary for full activity (5). This requirement for glycosylation is unique among IL-10 family members. Presumably, the same structural modifications apply to mouse IL-24. Mouse IL-24 is a 27 kDa protein when secreted, and is active on human receptors (1, 3). Mature mouse IL-24 shares 69%, 84%, 69%, 68% and 61% aa sequence identity with human, rat, equine, canine and bovine IL-24, respectively. A 119 aa isoform termed FISP-sp diverges at aa 77. FISP-sp has been found mainly in the endoplasmic reticulum of Th2 cells. It can dimerize with intracellular IL-24, and antagonize the pro-apoptotic effects of IL-24 (6). Under physiological conditions, cytokine-stimulated monocytes/macrophages and Th2 cells produce most secreted IL-24; other sources include B cells, keratinocytes, NK cells, and differentiating melanoma cells (1-3, 7-9). Secreted IL-24 binds and signals through complexes of IL‑20 R alpha :IL-20 R beta , or IL-22 R:IL-20 R beta (10). The IL-20 R alpha :IL-20 R beta complex is also a receptor for IL-19 and IL-20, while IL-22 R:IL-20 R beta binds IL‑20 (2, 10). Both receptors are widely expressed, but have not been found on hematopoietic cells (3). Even so, IL-24 induces type I proinflammatory cytokines in monocytes, and inhibits plasma cell differentiation in germinal center B cells (8, 11). The phenotype of mice transgenic for IL-24 is similar to that of IL-20 and IL-22 transgenic mice, indicating overlap in their activities, particularly in the skin (12). Secreted IL-24 is anti-angiogenic, binding receptors on endothelial cells and blocking their differentiation (13). Intratumoral injection of adenovirus coding for IL-24 causes tumor-specific apoptosis in humans, but it is not clear whether secreted IL-24 contributes to this effect (14).
Schaefer, G. et al. (2001) J. Immunol. 166:5859.
Trivella, D.B.B. et al. (2010) Cell. Mol. Life Sci. 67:2909.
Wang, M. and P. Liang (2005) Immunology 114:166.
Swissprot Accession # Q925J3.
Fuson, K.L. et al. (2009) J. Biol. Chem. 284:30526.
Sahoo, A. et al. (2008) J. Biol. Chem. 283:28860.
Poindexter, N.J. et al. (2005) J. Leukoc. Biol. 78:745.
Maarof, G. et al. (2010) Blood 115:1718.
Poindexter, N.J. et al. (2010) Exp. Dermatol. 19:714.
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