Recombinant Human CD27/TNFRSF7 Fc Avi-tag Protein, CF

Biotinylated
Catalog # Availability Size / Price Qty
AVI11027-050
Biotinylated Recombinant Human CD27/TNFRSF7 Fc Chimera Avi-tag Protein SDS-PAGE.
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Recombinant Human CD27/TNFRSF7 Fc Avi-tag Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. When Recombinant Human CD27 Ligand/TNFSF7 Protein (Catalog # 9328-CL) is immobilized at 1.0 µg/mL (100 µL/well), Biotinylated Recombinant Human CD27/TNFRSF7 Fc Chimera Avi-tag (Catalog # AVI11027) binds with an ED50 of 6.00-60.0 ng/mL.
Source
Chinese Hamster Ovary cell line, CHO-derived human CD27/TNFRSF7 protein
Human CD27
(Thr21-Arg191)
Accession # P26842.2
IEGRMDHuman IgG1 Fc
(Pro100-Lys330)
Avi-tag
N-terminusC-terminus
Accession #
N-terminal Sequence
Analysis
Thr21
Structure / Form
Disulfide-linked homodimer
Biotinylated via Avi-tag
Predicted Molecular Mass
48 kDa
SDS-PAGE
57-69 kDa, under reducing conditions.

Product Datasheets

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AVI11027

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.

AVI11027

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 500 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.

Data Image

SDS-PAGE Biotinylated Recombinant Human CD27/TNFRSF7 Fc Chimera Avi-tag Protein SDS-PAGE. View Larger

2 μg/lane of Biotinylated Recombinant Human CD27/TNFRSF7 Fc Chimera Avi-tag Protein (Catalog # AVI11027) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 57-69 kDa and 110-140 kDa, respectively.

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Background: CD27/TNFRSF7

CD27, also known as TNFRSF7, is an approximately 55 kDa transmembrane protein in the TNF receptor superfamily. It functions as a co‑stimulatory molecule that supports lymphocyte activation and survival (1). Mature human CD27 consists of a 172 amino acid (aa) extracellular domain (ECD) with three TNFR cysteine‑rich repeats, a 21 aa transmembrane segment, and a 48 aa cytoplasmic domain (2). Within the ECD, human CD27 shares 63% and 66% aa sequence identity with mouse and rat CD27, respectively. CD27 is expressed as a disulfide‑linked homodimer that carries N‑linked and O‑linked glycosylation (3, 4). Proteolytic cleavage of CD27 results in the shedding of a 28‑32 kDa fragment of the ECD (4). CD27 is weakly expressed on naïve T cells and NK cells and is up‑regulated upon cell activation (4, 5). It is also up‑regulated on activated germinal center B cells, plasma cells, and a subset of memory B cells (6, 7). CD27 binds to the transmembrane glycoprotein CD27 Ligand/CD70 which is expressed on activated B cells, activated T cells, and dendritic cells (1, 8, 9). This interaction contributes to the activation and survival of CD4+ helper T cells (8‑11), CD8+ effector T cells (12, 13), memory T cells (10), and NK cells (5, 14). Ligation of CD27 on B cells promotes germinal center formation and the expansion and affinity maturation of memory B cell responses (6, 15). Our Avi-tag Biotinylated CD27/TNFRSF7 Fc Chimeria features biotinylation at a single site contained within the Avi-tag, a unique 15 amino acid peptide. Protein orientation will be uniform when bound to streptavidin-coated surface due to the precise control of biotinylation and the rest of the protein is unchanged so there is no interference in the protein's bioactivity.

References
  1. Nolte, M.A. et al. (2009) Immunol. Rev. 229:216.
  2. Camerini, D. et al. (1991) J. Immunol. 147:3165.
  3. van Lier, R.A. et al. (1987) J. Immunol. 139:1589.
  4. Loenen, W.A. et al. (1992) Eur. J. Immunol. 22:447.
  5. Takeda, K. et al. (2000) J. Immunol. 164:1741.
  6. Xiao, Y. et al. (2004) J. Immunol. 172:7432.
  7. Jung, J. et al. (2000) Eur. J. Immunol. 30:2437.
  8. Goodwin, R.G. et al. (1993) Cell 73:447.
  9. Bowman, M.R. et al. (1994) J. Immunol. 152:1756.
  10. Hendriks, J. et al. (2000) Nat. Immunol. 1:433.
  11. van Oosterwijk, M.F. et al. (2007) Int. Immunol. 19:713.
  12. Rowley, T.F. and A. Al Shamkhani (2004) J. Immunol. 172:6039.
  13. Hendriks, J. et al. (2003) J. Exp. Med. 198:1369.
  14. Kelly, J.M. et al. (2002) Nat. Immunol. 3:83.
  15. Raman, V.S. et al. (2003) J. Immunol. 171:5876.
Entrez Gene IDs
939 (Human); 21940 (Mouse); 500318 (Rat); 102139476 (Cynomolgus Monkey)
Alternate Names
CD27 antigen; CD27 molecule; CD27; MGC20393; S152CD27L receptor; T cell activation antigen CD27; T cell activation antigen S152; T14; TNFRSF7; TNFRSF7T-cell activation antigen CD27; Tp55; Tumor necrosis factor receptor superfamily member 7; tumor necrosis factor receptor superfamily, member 7

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