LILRB2/CD85d/ILT-4 Protein, Cynomolgus (HEK293, Fc)

The LILRB2/CD85d/ILT-4 protein is a receptor for class I MHC antigens and can recognize multiple HLA alleles. It crucially downregulates the immune response and builds tolerance. LILRB2/CD85d/ILT-4 Protein, Cynomolgus (HEK293, Fc) is the recombinant cynomolgus-derived LILRB2/CD85d/ILT-4 protein, expressed by HEK293 , with C-hFc labeled tag. The total length of LILRB2/CD85d/ILT-4 Protein, Cynomolgus (HEK293, Fc) is 434 a.a., with molecular weight of 80-90 kDa.

The LILRB2/CD85d/ILT-4 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. It plays a crucial role in immune response down-regulation and the establishment of tolerance. Specifically, it recognizes HLA-G in complex with B2M/beta-2 microglobulin and a nonamer self-peptide, leading to the differentiation of type 1 regulatory T cells and myeloid-derived suppressor cells, crucial for maintaining maternal-fetal tolerance. LILRB2 competes with CD8A for binding to class I MHC antigens and inhibits FCGR1A-mediated cellular responses, including phosphorylation of proteins and mobilization of intracellular calcium ions. Moreover, it interacts with PTPN6 when phosphorylated and binds to FCGR1A. The direct interactions with peptide-bound HLA-G-B2M and HLA-F-B2M further highlight its involvement in immune modulation.

Cynomolgus LILRB2, hFc Tag captured on CM5 Chip via Protein A can bind Cynomolgus HLA-G Complex Tetramer, His Tag with an affinity constant of 42.50 nM as determined in SPR assay (Biacore T200).

Cynomolgus

HEK293

C-hFc

XM_015441717 (G24-R457)

102120967  [NCBI]

80-90 kDa

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

Lyophilized powder

Lyophilized from 0.22 μm filtered solution in PBS (pH 7.4). Normally 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.