LILRB1/CD85j/ILT2 Protein (Domain1&2), Human (HEK293, His)

The LILRB1/CD85j/ILT2 protein is a receptor for class I MHC antigens and recognizes multiple HLA alleles and H301/UL18 (human cytomegalovirus MHC homolog). Ligand binding induces inhibitory signals that downregulate immune responses. LILRB1/CD85j/ILT2 Protein (Domain1&2), Human (HEK293, His) is the recombinant human-derived LILRB1/CD85j/ILT2 protein, expressed by HEK293 , with C-His labeled tag.

The LILRB1/CD85j/ILT2 Protein serves as a receptor for class I MHC antigens, demonstrating recognition across a broad spectrum of HLA-A, HLA-B, HLA-C, HLA-G, and HLA-F alleles. Additionally, it acts as a receptor for H301/UL18, a human cytomegalovirus class I MHC homolog. Ligand binding induces inhibitory signals, leading to the down-regulation of the immune response. The engagement of LILRB1 by class I MHC molecules on natural killer cells or T-cells protects target cells from lysis, and interaction with HLA-B or HLA-E inhibits FCER1A signaling and serotonin release. Moreover, LILRB1 inhibits FCGR1A-mediated cellular responses, including phosphorylation of proteins and mobilization of intracellular calcium ions. It recognizes HLA-G in complex with B2M/beta-2 microglobulin and a nonamer self-peptide, triggering the secretion of growth-promoting factors by decidual NK cells. Additionally, it reprograms B cells toward an immune suppressive phenotype. LILRB1 binds PTPN6 when phosphorylated and interacts with FCER1A, FCGR1A, and the UL18 protein from human cytomegalovirus. It also interacts with peptide-bound HLA-G-B2M and HLA-F-B2M complexes, highlighting its diverse roles in immune modulation and viral recognition.

1. Immobilized Human LILRB1 Domain1&2, His Tag at 5 μg/mL (100μl/Well) on the plate. Dose response curve for Anti-LILRB1 Antibody, hFc Tag with the EC₅₀ of ≤8 ng/mL determined by ELISA.
2. Serial dilutions of Anti-LILRB1 Antibody were added into Biotinylated Human HLA-G Complex Tetramer, His Tag : Human LILRB1 Domain1&2, His Tag binding reactioins. The half maximal inhibitiory concentration (IC₅₀) is 34.6ng/ml.

Human

HEK293

C-His

Q8NHL6-1 (G24-G221)

10859  [NCBI]

25-30 kDa

Greater than 95% as determined by Tris-Bis PAGE.

Lyophilized powder

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4. Normally 5%-8% trehalose is added as protectant before lyophilization.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.