Recombinant Mouse PILR-beta Protein, CF Summary
Product Specifications
Ala28-Gly193, with a C-terminal 6-His tag
Analysis
Product Datasheets
Carrier Free
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.
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.
3525-PR
| Formulation | Lyophilized from a 0.2 μm filtered solution in PBS. |
| Reconstitution | Reconstitute at 100 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.
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Reconstitution Calculator
Background: PILR-beta
PILR-beta (paired immunoglobulin-like type 2 receptor-beta) is one of two members of a small family of immunoregulatory Ig-superfamily receptors (1, 2). It is a counterpart to PILR-alpha and it likely arose through PILR-alpha gene duplication and rearrangement (1). The PILRs represent one of many pairs of Ig-like domain-containing receptors that participate in immune regulation. PILR-beta and -alpha should not be confused with the similarly named PIRs (also paired immunoglobulin-like receptors), or the functionally-related SIRP and ILT/LILR/CD85/LIR family of receptors (2). While PIRs, ILTs and SIRPs contain three to six Ig-like domains in their extracellular region, PILR-beta and -alpha show only one Ig-like region in their extracellular domain (ECD) (1, 2). Mouse PILR-beta is a 196 amino acid (aa) type I transmembrane (TM) protein (3). It contains a 167 aa ECD, a 21 aa TM segment, and a short 8 aa cytoplasmic region. The ECD shows a V-type Ig-like domain (aa 39 - 135), while the TM segment contains a positively-charged Lys at position # 202. This Lys is known to interact with the transmembrane signaling adaptor protein DAP12, making PILR-beta an activating receptor. Activation of PILR-beta through CD99 ligation induces NK cell cytotoxicity and dendritic cell secretion of NO and TNF-alpha (3). Mouse PILR-beta is found on NK cells, neutrophils, macrophages, and monocyte-derived dendritic cells (3). Mouse PILR-beta ECD is 44% and 75% aa identical to human and rat PILR-beta ECD, respectively; it is 75% aa identical to the ECD of mouse PILR-alpha (3). Evidence suggests that mouse PILR-beta will not be active in a human system (3). Potential isoforms of PILR-beta have been reported. One shows an alternate start site at Met14, a second shows a 21 aa substitution for the C-terminal 67 aa, and a third exhibits multiple polymorphisms for an overall aa identity of 86% (4, 5, 6).
- Wilson, M.D. et al. (2006) Physiol. Genomics 27:201.
- Lanier, L.L. (2001) Curr. Opin. Immunol. 13:326.
- Shiratori, I. et al. (2004) J. Exp. Med. 199:525.
- Genbank Accession # NP_573472.
- Genbank Accession # BAC29442.
- Genbank Accession # XP_001480583.
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