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Human LILRB1/CD85j/ILT2 Protein

Product Info
Source

Recombinant Human LILRB1/CD85j/ILT2 Protein is expressed from Expi293 with His tag and Avi tag at the C-terminal. It contains Gly24-His458.[Accession | Q8NHL6]

Molecular Weight

The protein has a predicted MW of 50 kDa. Due to glycosylation, the protein migrates to 72-78 kDa based on Tris-Bis PAGE result.

Endotoxin

Less than 1EU per μg by the LAL method.

Purity

> 95% as determined by Tris-Bis PAGE
> 95% as determined by SEC-HPLC

Formulation

Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 5 % trehalose is added as protectant before lyophilization.

Reconstitution

Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.

Storage

The product should be stored at -70℃ or -20℃.

Assay Data
Tris-Bis PAGE

Human LILRB1 on Tris-Bis PAGE under reduced conditions. The purity is greater than 95%.

SEC-HPLC

The purity of Human LILRB1 is greater than 95% as determined by SEC-HPLC.

ELISA Data

Immobilized Human LILRB1 at 1μg/ml (100μl/well) on the plate. Dose response curve for Anti-LILRB1 Antibody, hFc Tag with the EC50 of 11.1ng/ml determined by ELISA.

Blocking Data

Serial dilutions of Human LILRB1 Antibody were added into Biotinylated Human HLA-G Complex Tetramer, His Tag : Human LILRB1, His Tag binding reactioins. The half maximal inhibitiory concentration (IC50) is 28.4ng/ml.

Background

LILRB1, also known as CD85j and ILT2, is a 110 kDa transmembrane glycoprotein in the LILR immunoregulatory protein family. Mature human LILRB1 consists of a 438 amino acid (aa) extracellular domain (ECD) with 4 tandem Ig-like domains, a 21 aa transmembrane segment, and a 168 aa cytoplasmic domain with 4 inhibitory ITIM motifs.LILRB1 is a receptor for class I MHC antigens. Recognizes a broad spectrum of HLA-A, HLA-B, HLA-C, HLA-G and HLA-F alleles. Receptor for H301/UL18, a human cytomegalovirus class I MHC homolog. Ligand binding results in inhibitory signals and down-regulation of the immune response.

Synonyms

CD85 antigen-like family member J; CD85j antigen; CD85j; Ig-like transcript 2; ILT2; ILT-2; ILT2FLJ37515; Immunoglobulin-like transcript 2; leukocyte Ig-like receptor-1; Leukocyte immunoglobulin-like receptor 1; leukocyte immunoglobulin-like receptor subfamily B member 1 soluble isoform; leukocyte immunoglobulin-like receptor subfamily B member 1; leukocyte immunoglobulin-like receptor, subfamily B (with TM and ITIM domains); LILRB1; LIR1; LIR1LIR-1MIR-7CD85MIR7CD85 antigen; member 1; MIR7; Monocyte/macrophage immunoglobulin-like receptor 7

References

(1)Anderson K J , Allen R L . Regulation of T‐cell immunity by leucocyte immunoglobulin‐like receptors: innate immune receptors for self on antigen‐presenting cells[J]. Immunology, 2009, 127.

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