CD272, also known as BTLA (B- and T-lymphocyte attenuator), is a single pass type I transmembrane glycoprotein that belongs to the CD28/CTLA4 family of the Ig superfamily. Like CD28 and CTLA4, CD272 contains one Ig-like domain in the extracellular region. However, the Ig-like domain is an I­type rather than a V­type domain commonly found in other family members. CD272 also differs from other CD28/CTLA4 family members through the interaction of its Ig-like domain with the TNF superfamily member, HVEM (TNFRSF14) rather than with B7 family ligands. CD272 is an immune co-inhibitory molecule expressed on T cells, B cells and, macrophages, dendritic and NK cells.  The HVEM-CD272 ligation relays inhibitory signals to suppress the immune response. Expression of CD272 is low in naïve T cells and increased during antigen­specific induction of anergy. In B cells, BTLA is highest when cells are mature and naïve. BTLA appears to limit T cell numbers, since deletion of BTLA results in overproduction of T cells, especially CD8+ memory T cells in mice.  There are two ITIM motifs and three Tyr phosphorylation sites in the cytoplasmic tail of CD272  that mediate inhibitory signaling.   Polymorphisms in the CD272 gene have been associated with an increased risk of rheumatoid arthritis. 

CD272, also known as BTLA (B- and T-lymphocyte attenuator), is a single pass type I transmembrane glycoprotein that belongs to the CD28/CTLA4 family of the Ig superfamily. Like CD28 and CTLA4, CD272 contains one Ig-like domain in the extracellular region. However, the Ig-like domain is an I­type rather than a V­type domain commonly found in other family members. CD272 also differs from other CD28/CTLA4 family members through the interaction of its Ig-like domain with the TNF superfamily member, HVEM (TNFRSF14) rather than with B7 family ligands. CD272 is an immune co-inhibitory molecule expressed on T cells, B cells and, macrophages, dendritic and NK cells.  The HVEM-CD272 ligation relays inhibitory signals to suppress the immune response. Expression of CD272 is low in naïve T cells and increased during antigen­specific induction of anergy. In B cells, BTLA is highest when cells are mature and naïve. BTLA appears to limit T cell numbers, since deletion of BTLA results in overproduction of T cells, especially CD8+ memory T cells in mice.  There are two ITIM motifs and three Tyr phosphorylation sites in the cytoplasmic tail of CD272  that mediate inhibitory signaling.   Polymorphisms in the CD272 gene have been associated with an increased risk of rheumatoid arthritis. 

 

Product Details

 

Gene Symbol: CD272; BTLA; BTLA1; BTLA-1

 

NCBI Gene ID: 151888

 

Uniprot Entry: Q7Z6A9

 

Construct Details: Expressed as the combination of a heavy chain (HC) containing VH from anti-CD272 mAb and CH1-3 region of human IgG1 and a light chain (LC) encoding VL from anti-CD272 mAb and CL of human kappa light chain.  Exists as a disulfide linked dimer of the HC and LC hetero-dimer under non-reducing condition.

 

Source:  Mammalian cells stably expressing anti-CD272 human heavy chain and light chain and growing in chemical-defined media with no animal components or antibiotics 

 

M.W.: Calculated molecular mass (kDa): 146 (49 kDa for a single HC, 24 kDa for a single LC); Estimated by SDS-PAGE under non-reducing condition(kDa): 150

 

Purity: >95% judged by SDS-PAGE under reducing condition (see the gel image above, labeled as DTT "+")

 

Formulation: Supplied at 1.0 mg/ml in sterile PBSpH7.4 (carrier free).  The purified recombinant antibody was labeled with Biotin (3-5 Biotin per IgG molecule) using the standard procedure.

 

Endotoxin Level: <0.1 EU per 1 μg of purified recombinant protein determined by the LAL method

 

Biological Activity: Binds human CD272 protein (SKU#: FCL0722) with high affinity (apparent K_D < 1 nM) by ELISA. Recognizes cell surface human CD272 by flow cytometry, IHC staining and fluorescent microscopy. 

 

  

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

Restriction: This product is not transferable or re-sellable.  Customer obtain no right to transfer, assign, or sublicense its use rights, or to transfer, resell, package, or otherwise distribute the product, or to use the product for the benefit of any third party or for any commercial purpose.  Customer may only use the product in compliance with applicable local, state and federal laws, regulations and rules.  Customer may not directly or indirectly use the product or allow the transfer, transmission, export or re-export of all or any part of the product in violation of any export control law or regulation of the united states or any other relevant jurisdiction.  Your use of this product constitutes acceptance of the terms of this limited use agreement.  Please refer to our “terms & conditions” for details.  If you are not willing to accept the limitation of this agreement, G&P Biosciences will accept return of the product for a full/partial refund.

 

Storage

 

The product is shipped at 4°C. Upon receipt, centrifuge the product briefly before opening the vial. It is recommended to store small aliquots at the temperature below –20°C for long-term storage and the product is stable for 3 months. The undiluted protein can be stored at 4°C for no more than 2 weeks.

 

 

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

 

 

 

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

 

References

 

1. Nat. Immunol. 4:670 (2003). 

2. J. Biol. Chem. 280:39553 (2005). 

3. Nat. Immunol. 6:90 (2005). 

4. J. Immunol. 174:3377 (2005). 

5. Nat. Rev. Immunol. 6:671 (2006).

 

 

 

 

Documentation

 

Product datasheet (pdf) can be downloaded here: MAB1724B-PDS.pdf

 

 

 

Additional supporting documents, including COA and MSDS are available upon request.

 

 

 

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

Restriction: This product is not transferable or re-sellable.  Customer obtain no right to transfer, assign, or sublicense its use rights, or to transfer, resell, package, or otherwise distribute the product, or to use the product for the benefit of any third party or for any commercial purpose.  Customer may only use the product in compliance with applicable local, state and federal laws, regulations and rules.  Customer may not directly or indirectly use the product or allow the transfer, transmission, export or re-export of all or any part of the product in violation of any export control law or regulation of the united states or any other relevant jurisdiction.  Your use of this product constitutes acceptance of the terms of this limited use agreement.  Please refer to our “terms & conditions” for details.  If you are not willing to accept the limitation of this agreement, G&P Biosciences will accept return of the product for a full/partial refund.