LILRB4 (Leukocyte immunoglobulin like receptor B4), also known as CD85k, LIR5 (Leukocyte immunoglobulin-like receptor 5), and ILT3 (Ig-like transcript5), is a member of the leukocyte immunoglobulin (Ig)-like receptor (LIR) family of the Ig superfamily (IgSF).  It belongs to the subfamily B class of LIR receptors (LILRBs), which are single-pass type I trnasmembrane proteins with 2 or 4 extracellular Ig-like domains, a transmembrane domain (TM), and 2-4 cytoplasmic immunoreceptor tyrosine-based inhibitory motifs (ITIMs). LILRB1 contains 2 Ig-like C2 type domains and 3 TIIMs. The phosphorylated ITIM motif can bind the SH2 domain of several SH2-containing phosphatases to modulate cellular responses.  LILRB1 is detected in monocytes, macrophages, dendritic cells, lung, natural killer cells and B-cells. LILRB4 acts as a receptor for class I MHC antigens. It recognizes a broad spectrum of HLA-A, HLA-B, HLA-C and HLA-G alleles. LILRB4 may be involved in the down-regulation of the immune response and the development of tolerance, e.g. towards transplants. LILRB4 interferes with TNFRSF5-signaling and NF-kappa-B up-regulation. It also inhibits receptor-mediated phosphorylation of cellular proteins and mobilization of intracellular calcium ions.

LILRB4 (Leukocyte immunoglobulin like receptor B4), also known as CD85k, LIR5 (Leukocyte immunoglobulin-like receptor 5), and ILT3 (Ig-like transcript5), is a member of the leukocyte immunoglobulin (Ig)-like receptor (LIR) family of the Ig superfamily (IgSF).  It belongs to the subfamily B class of LIR receptors (LILRBs), which are single-pass type I trnasmembrane proteins with 2 or 4 extracellular Ig-like domains, a transmembrane domain (TM), and 2-4 cytoplasmic immunoreceptor tyrosine-based inhibitory motifs (ITIMs). LILRB1 contains 2 Ig-like C2 type domains and 3 TIIMs. The phosphorylated ITIM motif can bind the SH2 domain of several SH2-containing phosphatases to modulate cellular responses.  LILRB1 is detected in monocytes, macrophages, dendritic cells, lung, natural killer cells and B-cells. LILRB4 acts as a receptor for class I MHC antigens. It recognizes a broad spectrum of HLA-A, HLA-B, HLA-C and HLA-G alleles. LILRB4 may be involved in the down-regulation of the immune response and the development of tolerance, e.g. towards transplants. LILRB4 interferes with TNFRSF5-signaling and NF-kappa-B up-regulation. It also inhibits receptor-mediated phosphorylation of cellular proteins and mobilization of intracellular calcium ions.

 

Product Details

 

Gene Symbol: LILRB4; ILT3; LIR5; CD85K; ILT-3; LIR-5

 

NCBI Gene ID: 11006

 

Uniprot Entry: Q8NHJ6

 

Construct Details: Full length human LILRB4 gene is subcloned into the Lentiviral expression vector pLTC with an upstream CMV promoter, which can be used for both transient and stable expression in mammalian cells.  The construct also contains a Puromycin marker for antibiotic stable selection. It can be co-transfected with the LentiPAK DNA mix (SKU# LP-001) into HEK293 cells to produce high titer lentiviral particles.

 

Vector Type: pLTC (lentiviral expression vector containing a heterologous CMV promoter and with or without a marker, see the vector map above)

 

Formulation: Supplied with 10 μg of endotoxin-free plasmid DNA at 200 ng/μl in sterile TE buffer (pH8.0)

 

Gene Insert Size: 1347 (bp)

 

Gene Insert Sequence:  

ATGATCCCCACCTTCACGGCTCTGCTCTGCCTCGGGCTGAGTCTGGGCCCCAGGACCCACATGCAGGCAG

GGCCCCTCCCCAAACCCACCCTCTGGGCTGAGCCAGGCTCTGTGATCAGCTGGGGGAACTCTGTGACCAT

CTGGTGTCAGGGGACCCTGGAGGCTCGGGAGTACCGTCTGGATAAAGAGGAAAGCCCAGCACCCTGGGAC

AGACAGAACCCACTGGAGCCCAAGAACAAGGCCAGATTCTCCATCCCATCCATGACAGAGGACTATGCAG

GGAGATACCGCTGTTACTATCGCAGCCCTGTAGGCTGGTCACAGCCCAGTGACCCCCTGGAGCTGGTGAT

GACAGGAGCCTACAGTAAACCCACCCTTTCAGCCCTGCCGAGTCCTCTTGTGACCTCAGGAAAGAGCGTG

ACCCTGCTGTGTCAGTCACGGAGCCCAATGGACACTTTTCTTCTGATCAAGGAGCGGGCAGCCCATCCCC

TACTGCATCTGAGATCAGAGCACGGAGCTCAGCAGCACCAGGCTGAATTCCCCATGAGTCCTGTGACCTC

AGTGCACGGGGGGACCTACAGGTGCTTCAGCTCACACGGCTTCTCCCACTACCTGCTGTCACACCCCAGT

GACCCCCTGGAGCTCATAGTCTCAGGATCCTTGGAGGGTCCCAGGCCCTCACCCACAAGGTCCGTCTCAA

CAGCTGCAGGCCCTGAGGACCAGCCCCTCATGCCTACAGGGTCAGTCCCCCACAGTGGTCTGAGAAGGCA

CTGGGAGGTACTGATCGGGGTCTTGGTGGTCTCCATCCTGCTTCTCTCCCTCCTCCTCTTCCTCCTCCTC

CAACACTGGCGTCAGGGAAAACACAGGACATTGGCCCAGAGACAGGCTGATTTCCAACGTCCTCCAGGGG

CTGCCGAGCCAGAGCCCAAGGACGGGGGCCTACAGAGGAGGTCCAGCCCAGCTGCTGACGTCCAGGGAGA

AAACTTCTGTGCTGCCGTGAAGAACACACAGCCTGAGGACGGGGTGGAAATGGACACTCGGCAGAGCCCA

CACGATGAAGACCCCCAGGCAGTGACGTATGCCAAGGTGAAACACTCCAGACCTAGGAGAGAAATGGCCT

CTCCTCCCTCCCCACTGTCTGGGGAATTCCTGGACACAAAGGACAGACAGGCAGAAGAGGACAGACAGAT

GGACACTGAGGCTGCTGCATCTGAAGCCCCCCAGGATGTGACCTACGCCCGGCTGCACAGCTTTACCCTC

AGACAGAAGGCAACTGAGCCTCCTCCATCCCAGGAAGGGGCCTCTCCAGCTGAGCCCAGTGTCTATGCCA

CTCTGGCCATCCACTAA

 

 

Primers: Gene insert coding sequence can be confirmed by following primers:

(a) forward (or 5'-end) primer: 5’-CAAATGGGCGGTAGGCGTG-3’;

(b) reverse (or 3'-end) primer: 5’-CCAGGTTTCCGGGCCCTCAC-3’

 

 

Note: The sequence may vary due to the naturally occurring variants or mutations, such as single nucleotide polymorphism, or the artifact during PCR amplification.  High fidelity PCR systems should always be used. 

 

 

 

 

 

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

Restriction: This product is not transferable or re-sellable.  Customer obtain no right to transfer, assign, or sublicense its use rights, or to transfer, resell, package, or otherwise distribute the product, or to use the product for the benefit of any third party or for any commercial purpose.  Customer may only use the product in compliance with applicable local, state and federal laws, regulations and rules.  Customer may not directly or indirectly use the product or allow the transfer, transmission, export or re-export of all or any part of the product in violation of any export control law or regulation of the united states or any other relevant jurisdiction.  Your use of this product constitutes acceptance of the terms of this limited use agreement.  Please refer to our “terms & conditions” for details.  If you are not willing to accept the limitation of this agreement, G&P Biosciences will accept return of the product for a full/partial refund.

 

Storage

 

The product is shipped at 4°C. Upon receipt, centrifuge the product briefly before opening the vial. It is recommended to store small aliquots at the temperature below –20°C for long-term storage and the product is stable for 6 months. 

 

 

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

 

 

 

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

 

References

 

 

1. J. Exp. Med. 186:1809-1818(1997)

2. J. Immunol. 159:5192-5196(1997)

3. Eur. J. Immunol. 28:3423-3434(1998)

4. Immunity 11:603-613(1999) 

5. J. Immunol. 168:3351-3359(2002)

 

 

 

Additional supporting documents, including PDS, COA and MSDS are available upon request.

 

 

 

FOR RESEARCH USE ONLY. NOT FOR DIAGNOSTIC OR THERAPEUTIC USE IN HUMAN.

Restriction: This product is not transferable or re-sellable.  Customer obtain no right to transfer, assign, or sublicense its use rights, or to transfer, resell, package, or otherwise distribute the product, or to use the product for the benefit of any third party or for any commercial purpose.  Customer may only use the product in compliance with applicable local, state and federal laws, regulations and rules.  Customer may not directly or indirectly use the product or allow the transfer, transmission, export or re-export of all or any part of the product in violation of any export control law or regulation of the united states or any other relevant jurisdiction.  Your use of this product constitutes acceptance of the terms of this limited use agreement.  Please refer to our “terms & conditions” for details.  If you are not willing to accept the limitation of this agreement, G&P Biosciences will accept return of the product for a full/partial refund.