Recombinant Feline IL-15 Protein

Name: Recombinant Feline IL-15 Protein
Brand: R&D Systems
SKU: 7805-FL

R&D Systems, Inc. a Bio-Techne Brand

Catalog # 7805-FL

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Key Product Details

Source:	E. coli
Accession #:	O97687
Structure / Form:	Monomer
Applications:	Bioactivity

View Full Technical Details for Recombinant Feline IL-15 Protein

Product Specifications for Recombinant Feline IL-15 Protein

Source	E. coli-derived feline IL-15 protein Asn49-Ser162
Purity	>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin level	<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis	Asn49
Predicted Molecular Mass	13 kDa
SDS-PAGE	10 kDa, reducing conditions
Activity	Measured in a cell proliferation assay using MO7e human megakaryocytic leukemic cells. Avanzi, G. et al. (1988) Br. J. Haematol. 69:359. The ED₅₀ for this effect is 0.2-1.2 ng/mL.

Formulation, Preparation and Storage

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.

7805-FL

Carrier

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Reconstitution	Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.
Shipping	The product is shipped at ambient temperature. 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.

7805-FL/CF

Carrier Free

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution	Reconstitute at 100 μg/mL in PBS.
Shipping	The product is shipped at ambient temperature. 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.

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Background: IL-15

Interleukin 15 (IL-15) is a widely expressed 14 kDa cytokine that is structurally and functionally related to IL-2 and plays an important role in many immunological diseases (1). Mature feline IL-15 shares 80%, 83%, 68%, and 68% amino acid sequence identity with canine, human, mouse, and rat IL-15, respectively (2). IL-15 binds with high affinity to IL-15 R alpha (3). It binds with lower affinity to a complex of IL-2 R beta and the common gamma chain ( gamma c) which are also subunits of the IL-2 receptor complex (4). IL-15 associates with IL-15 R alpha in the endoplasmic reticulum, and this complex is expressed on the cell surface (5). The dominant mechanism of IL-15 action is known as transpresentation in which IL-15 and IL-15 R alpha are coordinately expressed on the surface of one cell and interact with complexes of IL-2 R beta / gamma c on adjacent cells (6). This enables cells to respond to IL-15 even if they do not express IL-15 R alpha (5). In human and mouse, soluble IL-15-binding forms of IL‑15 R alpha can be generated by proteolytic shedding and bind up nearly all the IL-15 in circulation (7‑9). Soluble IL-15 R alpha functions as an inhibitor that limits IL-15 action (3, 8). Ligation of membrane-associated IL-15/IL-15 R alpha complexes also induces reverse signaling that promotes activation of the IL-15/IL-15 R alpha expressing cells (10). IL-15 induces or enhances the differentiation, maintenance, or activation of multiple T cell subsets including NK, NKT, Th17, Treg, and CD8⁺ memory cells (11‑15). An important component of these functions is the ability of IL-15 to induce dendritic cell differentiation and inflammatory activation (10, 13). IL-15 exhibits anti-tumor activity independent of its actions on NK cells or CD8⁺ T cells (16). It also inhibits the deposition of lipid in adipocytes, and its circulating levels are decreased in obesity (17).

Item	Value
References	De Sabatino, A. et al. (2011) Cytokine Growth Factor Rev. 22:19. Dean, G.A. et al. (2005) Cytokine 29:77. Giri, J.G. et al. (1995) EMBO J. 14:3654. Giri, J. et al. (1994) EMBO J. 13:2822. Dubois, S. et al. (2002) Immunity 17:537. Castillo, E.F. and K.S. Schluns (2012) Cytokine 59:479. Budagian, V. et al. (2004) J. Biol. Chem. 279:40368. Mortier, E. et al. (2004) J. Immunol. 173:1681. Bergamaschi, C. et al. (2012) Blood 120:e1. Budagian, V. et al. (2004) J. Biol. Chem. 279:42192. Mortier, E. et al. (2008) J. Exp. Med. 205:1213. Gordy, L.E. et al. (2011) J. Immunol. 187:6335. Harris, K.M. (2011) J. Leukoc. Biol. 90:727. Xia, J. et al. (2010) Clin. Immunol. 134:130. Schluns, K.S. et al. (2002) J. Immunol. 168:4827. Davies, E. et al. (2010) J. Leukoc. Biol. 88:529. Barra, N.G. et al. (2010) Obesity 18:1601.
Long Name	Interleukin 15
Entrez Gene IDs	3600 (Human); 16168 (Mouse); 25670 (Rat); 102119613 (Cynomolgus Monkey); 493682 (Feline)
Alternate Names	IL-15, IL-15MGC9721, IL15, interleukin 15, interleukin-15

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Recombinant Feline IL-15 Protein

R&D Systems, Inc. a Bio-Techne Brand

Key Product Details

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Product Specifications for Recombinant Feline IL-15 Protein

Formulation, Preparation and Storage

Carrier Free

7805-FL

Carrier

7805-FL/CF

Carrier Free

Reconstitution Calculator

Background: IL-15

Citations for Recombinant Feline IL-15 Protein

Product Documents for Recombinant Feline IL-15 Protein

Product Datasheets

COA

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SDS

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