- Other Names
- SIS-delta, T-cell specific protein p288, beta-chemokine RANTES, regulated upon activation, normally T-expressed, and presumably secreted, small inducible cytokine A5.
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- Product Citations
RANTES is a CC chemokine and directs the migration of leukocytes in immune and inflammatory responses. Increased CCL5/RANTES expression has been associated with a wide range of inflammatory disorders and pathologies. This cytokine has been associated as well with the induction or promotion of cancer (prostate and breast). In the latter situation, RANTES can be angiogenic and also increase the metastatic potential of cancer cells by encouraging cellular migration to sites of its production. CCL5/RANTES also inhibits HIV-1 entry and infection by competing with the virus for CCR5 binding.Product Details
- Human RANTES, amino acids Ser24-Ser91 (Accession # NM_002985) was expressed in E. coli.
- Molecular Mass
- The 68 amino acid recombinant protein has a predicted molecular mass of approximately 7,851 Da. The DTT-reduced protein migrates at approximately 7kDa and the non-reduced protein migrates at approximately 9kDa by SDS-PAGE. The N-terminal amino acid is Serine.
- Purity is >98%, as determined by Coomassie stained SDS-PAGE.
- 0.22 µm filtered protein solution is in 26% Acetonitrile, 0.1% TFA (trifluoroacetic acid).
- Endotoxin Level
- Endotoxin level is <0.1 EU/µg (<0.01ng/µg) protein as determined by the LAL method.
- 10 and 25 µg sizes are bottled at 200 µg/mL. 100 µg size and larger sizes are lot-specific and bottled at the concentration indicated on the vial (please contact technical support for concentration, or use our Lookup tool if you have a lot number.) Please note, new lots of the 100 µg size will be lot-specific and may differ from previous lots that had a fixed concentration.
- Storage & Handling
- Unopened vial can be stored between 2°C and 8°C for one month, at -20°C for six months, or at -70°C for one year. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored from -20°C to -70°C. Stock solutions can also be prepared at 50-100 µg/mL in sterile buffer (PBS, HPBS, DPBS, or EBSS) containing carrier protein such as 0.2-1% BSA or HSA and stored in working aliquots at -20°C to -70°C. Avoid repeated freeze/thaw cycles.
- Bioactivity was measured by its property to chemoattract T cells in a dose dependent manner. The ED50 is 5-15 ng/ml, corresponding to a specific activity of 0.66-2.0 x 105 units/mg.
- Application Notes
BioLegend carrier-free recombinant proteins provided in liquid format are shipped on blue-ice. Our comparison testing data indicates that when handled and stored as recommended, the liquid format has equal or better stability and shelf-life compared to commercially available lyophilized proteins after reconstitution. Our liquid proteins are validated in-house to maintain activity after shipping on blue ice and are backed by our 100% satisfaction guarantee. If you have any concerns, contact us at firstname.lastname@example.org.
- RANTES/CCL5 is secreted by lymphocytes, macrophages, eosinophils, platelets, and fibroblasts. RANTES is expressed by hepatocytes, sinusoidal endothelial cells and biliary epithelium during chronic hepatitis C.
- RANTES can promote IL-2 and IL-5 expression in human T cells, and the expression of IL-6 and IL-8 in fibroblasts from patients with RA. RANTES modulates the LPS-induced IL-6 and TNFα in peripheral blood monocytes; this modulation is through the induction of IL-10 by RANTES.
- RANTES/CCL5 is chemoattractant for memory and activated T cells, monocytes, dendritic cells, eosinophils, NK cells, mast cells, and basophils.
- CCL5 binds to CCR1, CCR3 and CCR5 receptors. In addition CCL5 binds to CCR9; nevertheless, it does not induce calcium flux and therefore no chemotactic response.
- Bioactivity was measured by its property to chemoattract T cells in a dose dependent manner. The ED50 is 5-15 ng/ml.
- Cell Sources
- CCL5 is secreted by lymphocytes, macrophages, eosinophils, platelets, and fibroblasts. CCL5 is expressed by hepatocytes, sinusoidal endothelial cells, and biliary epithelium during chronic hepatitis C.
- Biology Area
- Cell Biology, Immunology, Innate Immunity, Neuroinflammation, Neuroscience
- Molecular Family
- Antigen References
1. Schall, et al. 1990. Nature 347:669-671.
2. Cocchi F, et al. 1995. Science 270:1811-1815.
3. Shahrara S, et al. 2006. J. Immunology 177:5077-5087.
4. Larrubia JR, et al. 2008. World J. Gastroenterol 14:7149-7159.
5. Gleissner CA, et al. 2008. Arterioscler Thromb. Vasc. Biol. 28:1920-1927.
- Gene ID
- 6352 View all products for this Gene ID
- View information about CCL5 on UniProt.org
- Does specific activity of a recombinant protein vary between lots?
Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.
- Have your recombinants been tested for stability?
Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.
- How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?
- Use formula Specific activity (Units/mg) = 10e6/ ED50 (ng/mL)
- How does the activity of your recombinant proteins compare to competitors?
We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!
- What is the specific activity or ED50 of my recombinant protein?
The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.