Mouse LAIR1 Protein

Leukocyte-associated Ig-like receptor 1 Protein Datasheet

LAIR1 Protein Product Information

• Synonym: LAIR1
• Protein Construction: A DNA sequence encoding the mouse LAIR1 (Q8BG84-6)(Gln22-Ser133) was expressed, fused with the Fc region of human IgG1 at the C-terminus.
• Source: Mouse
• Expression Host: Human Cells

LAIR1 Protein QC Testing

• Purity: > 95% as determined by SDS-PAGE
• Endotoxin: < 1.0 EU per μg of the protein as determined by the LAL method
• Stability: Samples are stable for up to twelve months from date of receipt at -70℃
• Predicted N terminal: Gln 22
• Molecular Mass: The recombinant mouse LAIR1 /Fc is a disulfide-linked homodimer. The reduced monomer comprises 353 amino acids and has a predicted molecular mass of 39.6 kDa. The apparent molecular mass of the protein is approximately 49-53 kDa in SDS-PAGE under reducing conditions due to glycosylation.
• Formulation: Lyophilized from sterile PBS, pH7.4.
  1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
  2. Please contact us for any concerns or special requirements.
• SDS-PAGE: LAIR1 protein

LAIR1 Protein Usage Guide

• Storage: Store it under sterile conditions at -70℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

LAIR1 Protein Description

Leukocyte associated Ig-like receptor-1 (LAIR1) is a surface molecule expressed on human mononuclear leukocytes that functions as an inhibitory receptor on human NK cells. In addition to NK cells, LAIR1 is expressed on T cells, B cells, macrophages, and dendritic cells. It is predicted to mediate inhibitory functions based on the presence of immunoreceptor tyrosine-based inhibitory motifs (ITIMs) in its cytoplasmic domain. Cross-linking of LAIR1 on human T cell clones results in inhibition of cytotoxicity only in T cell clones that lack CD28 and are able to spontaneously lyse certain targets in vitro. Moreover, the cytolytic activity of freshly isolated T cells, which is thought to be mainly due to "effector" T cells, can be inhibited by anti-LAIR1 mAb. Thus, LAIR1 functions as an inhibitory receptor not only on NK cells, but also on human T cells. This indicates that LAIR1 provides a mechanism of regulation of effector T cells and may play a role in the inhibition of unwanted bystander responses mediated by Ag-specific T cells.

References

1. Meyaard L. et al., 1999, J Immunol. 162 (10): 5800-4.
2. Meyaard L. et al., 2001, J Exp Med. 194 (1): 107-12.
3. Xu M. et al., 2000, J Biol Chem. 275 (23): 17440-6.