Recombinant Human TSLPR Fc Chimera Protein, CF

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981-TR-050
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human TSLPR Fc Chimera Protein, CF Summary

Product Specifications

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.
Activity
Measured by its ability to inhibit TSLP-dependent proliferation of BaF3 mouse pro‑B cells co-transfected with human IL-7 R alpha and human TSLP R. The ED50 for this effect is 10-30 µg/mL in the presence of 0.2 ng/mL of recombinant human TSLP.
Source
Mouse myeloma cell line, NS0-derived human TSLPR protein
Human TSLP R
(Gly25-Lys231)
Accession #Q9HC73
DIEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Analysis
Gly25
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
50.6 kDa (monomer)
SDS-PAGE
65-75 kDa, reducing conditions

Product Datasheets

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981-TR

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.

981-TR

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in sterile 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.

Background: TSLPR

TSLPR, also named Delta (1) and CRLM-2 (2) (cytokine receptor-like module-2), was originally cloned as a novel type 1 cytokine receptor with similarity to the common gamma chain. It was subsequently identified to be a subunit of the cellular receptor for the IL-7-like cytokine TSLP and termed TSLPR (3). The human TSLPR cDNA encodes a 371 amino acid (aa) residue type 1 membrane protein with a 22 aa residue signal peptide, a 210 aa residue extracellular domain, a 20 aa residue transmembrane domain, and a 119 aa residue cytoplasmic domain (4, 5). The extracellular region contains two fibronectin type III-like domains and a WSXWS-like motif. The cytoplasmic domain contains a membrane-proximal box 1 motif that is known to be important for association with JAKs (4). Human TSLPR displays 39% identity to mouse TSLPR and 24% identity to the common gamma receptor (4). An alternatively spliced mRNA variant encoding a soluble TSLPR has also been reported in mouse (2). TSLPR expression is ubiquitous in the immune and hematopoietic cells, but is up-regulated in Th2-skewed cells. Cells expressing TSLPR alone bind TSLP with low affinity. Co-expression of TSLPR and IL-7 R alpha is required for high-affinity TSLP binding and signal transduction (3-6). The TSLPR and IL-7 R alpha are co-expressed primarily on monocytes and dendritic cells and at lower levels in lymphoid cells. TSLP has been shown to induce the release of T cell-attracting chemokines from monocytes and enhance the maturation of CD11c+ dendritic cells (5).

References
  1. Fujio, K. et al. (2000) Blood 95:2204.
  2. Hiroyama, T. et al. (2000) Biochem. Biophys. Res. Commun. 272:224.
  3. Park, L.S. et al. (2000) J. Exp. Med. 192:659.
  4. Tonozuka, Y. et al. (2001) Cytogenet. Cell Genet. 93:23.
  5. Reche, P.A. et al. (2001) J. Immunol. 167:336.
  6. Pandey, A. et al. (2000) Nat. Immunol. 1:59.
Long Name
Thymic Stromal Lymphopoietin Receptor
Entrez Gene IDs
64109 (Human); 57914 (Mouse); 171499 (Rat)
Alternate Names
CRL2; CRL2cytokine receptor CRL2 precusor; CRLF2; CRLF2Y; CRLM-2; Cytokine receptor-like 2; cytokine receptor-like factor 2; ILXR; IL-XR; P2RY8/CRLF2 fusion; PCOR1; Thymic stromal lymphopoietin protein receptor; thymic stromal lymphopoietin receptor; thymic stromal-derived lymphopoietin receptor; TSLP R; TSLP receptor; TSLPR

Citation for Recombinant Human TSLPR Fc Chimera Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. A potential role of thymic stromal lymphopoietin in the recruitment of macrophages to mouse intervertebral disc cells via monocyte chemotactic protein 1 induction: implications for herniated discs.
    Authors: Ohba T, Haro H, Ando T, Koyama K, Hatsushika K, Suenaga F, Ohnuma Y, Nakamura Y, Katoh R, Ogawa H, Hamada Y, Nakao A
    Arthritis Rheum., 2008-11-01;58(11):3510-9.
    Species: Mouse
    Sample Types: Whole Cells
    Applications: Bioassay

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