LILRB1 / ILT-2 / CD85j [VMP55]



Leukocyte immunoglobulin-like receptors (LIRs) are members of the immunoglobulin superfamily of glycoproteins and are predominantly expressed by monocytes, B cells, dendritic cells, natural killer (NK) cells, peripheral blood leukocytes and tissues such as placenta, lung and liver. Immunoglobulin-like transcript 2 (ILT-2), also known as CD85 or MIR7, is a 650 amino acid glycoprotein that contains a 23 amino acid signal peptide, 4 extracellular C2-type IGSF domains and 4 intracellular ITIM motifs. ILT-2 can bind major histocompatability (MHC) class I molecules and inhibit cell termination by natural killer (NK) and T cells, and inhibit Ca2+ mobilization in myeloid cells triggered through the B cell antigen receptor and histocompatibility leukocyte antigens (HLA)-DR. ILT-2 contains four putative cytoplasmic tyrosine-based inhibitory motifs and upon tyrosine phosphorylation, associates with the tyrosine phosphatase SHP-1.

Product Properties & Targets

Species Reactivity
Cellular Localization
Cell membrane, Secreted
Light Chain
Gene Name
Positive Control
IB4 or K-562 cells. Human PBMCs.
Hairy cell leukemia cells
Alternate Names
Leukocyte immunoglobulin-like receptor subfamily B member 1, CD85 antigen-like family member J, Immunoglobulin-like transcript 2, Monocyte/macrophage immunoglobulin-like receptor 7, CD85 antigen; CD85j antigen; Ig like transcript 2; immunoglobulin like transcript 2 (ILT2); leukocyte Ig like receptor 1; Leukocyte immunoglobulin like receptor 1; leukocyte immunoglobulin like receptor subfamily B member 1 soluble isoform; LILRB1; LIR1; Monocyte/macrophage immunoglobulin like receptor 7 (MIR7); PIRB

Database Links

Entrez Gene ID

Additional Information

Human Gene Symbol
Chromosome Location
Mol. Weight of Antigen


  • Receptor for class I MHC antigens. Recognizes a broad spectrum of HLA-A, HLA-B, HLA-C, HLA-G and HLA-F alleles (PubMed:16455647, PubMed:28636952). Receptor for H301/UL18, a human cytomegalovirus class I MHC homolog. Ligand binding results in inhibitory signals and down-regulation of the immune response. Engagement of LILRB1 present on natural killer cells or T-cells by class I MHC molecules protects the target cells from lysis. Interaction with HLA-B or HLA-E leads to inhibition of FCER1A signaling and serotonin release. Inhibits FCGR1A-mediated phosphorylation of cellular proteins and mobilization of intracellular calcium ions (PubMed:11907092, PubMed:9285411, PubMed:9842885). Recognizes HLA-G in complex with B2M/beta-2 microglobulin and a nonamer self-peptide (PubMed:16455647). Upon interaction with peptide-bound HLA-G-B2M complex, triggers secretion of growth-promoting factors by decidual NK cells (PubMed:29262349, PubMed:19304799). Reprograms B cells toward an immune suppressive phenotype (PubMed:24453251).

Known Applications & Suggested Dilutions

  • Immunoprecipitation (1-2ug per 100-500ug of total protein (1ml of cell lysate))
  • Western Blot (1-2ug/ml)
  • ,Flow Cytometry (1-2ug/million cells)
  • Immunofluorescence (1-2ug/ml)
  • ,Optimal dilution for a specific application should be determined.

Key References

  • Kim, J.S., et al. 2004. Human cytomegalovirus UL18 alleviated human NK-mediated swine endothelial cell lysis. Biochem. Biophys. Res. Commun. 315: 144-150.

Storage & Stability

Antibody with azide - store at 2 to 8°C. Antibody without azide - store at -20 to -80°C. Antibody is stable for 24 months. Non-hazardous. No MSDS required.


This antibody is available for research use only and is not approved for use in diagnosis.

Supplied as

200ug/ml of Ab purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA & azide at 1.0mg/ml.


There are no warranties, expressed or implied, which extend beyond this description. Company is not liable for any personal injury or economic loss resulting from this product.


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