Recombinant Human BTLA His-tag Protein, CF

R&D Systems | Catalog # 9235-BT

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Key Product Details

  • R&D Systems HEK293-derived Recombinant Human BTLA His-tag Protein (9235-BT)
  • Quality control testing to verify active proteins with lot specific assays by in-house scientists
  • All R&D Systems proteins are covered with a 100% guarantee

Source

HEK293

Accession Number

NP_001078826.1

Applications

Bioactivity
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Product Specifications

Source

Human embryonic kidney cell, HEK293-derived human BTLA protein
Lys31-Leu150, with a C-terminal 6-His tag

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.

N-terminal Sequence Analysis

Lys31

Predicted Molecular Mass

15 kDa

SDS-PAGE

23-33 kDa, reducing conditions

Activity

Measured by its binding ability in a functional ELISA.
When Recombinant Mouse HVEM/TNFRSF14 Fc Chimera (Catalog # 2516-HV) is immobilized at 0.5 μg/mL, 100 μL/well, the concentration of Recombinant Human BTLA that produces 50% of the optimal binding response is approximately 0.1-0.5 μg/mL.

Scientific Data Images for Recombinant Human BTLA His-tag Protein, CF

Recombinant Human BTLA His-tag Protein Bioactivity

Recombinant Human BTLA His-tag Protein Bioactivity

When Recombinant Mouse HVEM/TNFRSF14 Fc Chimera (Catalog # 2516-HV) is coated at 0.5 µg/mL, Recombinant BTLA (Catalog # 9235-BT) binds with an ED50 of 0.1-0.5 µg/mL.

Formulation, Preparation, and Storage

9235-BT
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution

Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped with polar packs. 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.

Calculators

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: BTLA

B- and T-lymphocyte attenuator (BTLA; CD272) is a 35 kDa type I transmembrane glycoprotein in the CD28 family of T cell costimulatory molecules (1-3). Mature human BTLA contains a 127 amino acid (aa) extracellular domain (ECD), a 21 aa transmembrane sequence, and a 111 aa cytoplasmic domain. The two ITIM motifs and three Tyr phosphorylation sites in the cytoplasmic tail transmit inhibitory signaling (4-5). The ECD of human BTLA shares 42% and 44% aa identity with that of mouse and rat BTLA, respectively. A splice variant lacking the transmembrane domain has been reported (6). Unlike other CD28 family members, the BTLA Ig domain in the ECD is of the I-type rather than V-type, and BTLA does not form homodimers (7). BTLA is also unusual in its interaction with the TNF superfamily member HVEM rather than with B7 family ligands (8). BTLA is expressed on T cells, B cells, macrophages, dendritic cells, and NK cells (9). Its expression is low in naïve T cells and increases during antigen-specific induction of anergy. In B cells, BTLA expression is highest in mature naïve cells (9). BTLA apparently limits T cell numbers, since its deletion results in overproduction of T cells, especially CD8+ memory T cells that are hyper-responsive to TCR crosslinking (10). Under the control of ROR gamma t and IL-7, BTLA regulates the homeostasis and inflammatory responses of gamma delta T cells (11). The binding of BTLA and HVEM does not preclude the concurrent binding of other HVEM ligands such as LIGHT or Lymphotoxin-alpha (12).

References

  1. Murphy, K.M. et al. (2006) Nat. Rev. Immunol. 6:671.
  2. Croft, M. (2005) Trends. Immunol. 26:292.
  3. Watanabe, N. et al. (2003) Nat. Immunol. 4:670.
  4. Gavrieli, M. et al. (2003) Biochem. Biophys. Res. Commun. 312:1236.
  5. Chemnitz, J.M. et al. (2006) J. Immunol. 176:6603.
  6. Han, P. et al. (2004) J. Immunol. 172 :5931
  7. Compaan, D.M. et al. (2005) J. Biol. Chem. 280:39553.
  8. Sedy, J. R. et al. (2005) Nat. Immunol. 6:90.
  9. Hurchla, M.A. et al. (2005) J. Immunol. 174:3377.
  10. Krieg, C. et al. (2007) Nat. Immunol. 8:162.
  11. Bekiaris, V. et al. (2013) Immunity 39:1082.
  12. Cai G and Freeman GJ, (2009) Immunol Rev. 229:244

Long Name

B- And T-Lymphocyte Attenuator

Alternate Names

CD272

Entrez Gene IDs

151888 (Human); 208154 (Mouse); 102144877 (Cynomolgus Monkey)

Gene Symbol

BTLA

UniProt

NP_001078826.1

Additional BTLA Products

Product Documents for Recombinant Human BTLA His-tag Protein, CF

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Product Specific Notices for Recombinant Human BTLA His-tag Protein, CF

For research use only

Citations for Recombinant Human BTLA His-tag Protein, CF

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FAQs for Recombinant Human BTLA His-tag Protein, CF

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  • Q: To which isoform does the sequence of the Recombinant Human BTLA His-tag Protein, CF (Catalog # 9235-BT) correspond?

    A: The sequence of this protein is Lys31-Leu150 with a C-terminal 6-His tag. This sequence corresponds to Isoform 2 of Human BTLA based on Accession # Q7Z6A9-2, which is an alternative splicing variant of the canonical sequence that is Isoform 1.

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