LILRB4/CD85k/ILT3 Protein, Human (HEK293, mFc)
LILRB4/CD85k/ILT3 Protein, Human (HEK293, mFc) is the recombinant human-derived LILRB4/CD85k/ILT3 protein, expressed by HEK293, with C-mFc tag.
- Species: Human
- Source: HEK293
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Storage:Stored at -20°C for 2 years from date of receipt. 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.
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Biological Activity
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Technical Parameters
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Product Properties
- Documentation
- Help & FAQs
Biological Activity
Description
LILRB4/CD85k/ILT3 Protein, Human (HEK293, mFc) is the recombinant human-derived LILRB4/CD85k/ILT3 protein, expressed by HEK293, with C-mFc tag.
Background
LILRB4/CD85k/ILT3, an inhibitory receptor intricately involved in immune regulation, plays a crucial role in down-regulating immune responses. It serves as a receptor for FN1 and integrin ITGAV/ITGB3, exerting inhibitory effects on IgE-mediated mast cell activation and KITLG/SCF-mediated mast cell activation. Through its interaction with ITGAV/ITGB3, LILRB4/ILT3 further inhibits antibody production by memory and marginal zone B cells, likely by suppressing their differentiation into plasma cells. This multifaceted receptor extends its inhibitory influence to diverse immune functions, such as suppressing IFNG production by CD8 T cells, CD4 T cells, and natural killer cells, as well as inhibiting antigen presentation by dendritic cells to T cells, preventing T cell activation. Additionally, LILRB4/ILT3 effectively inhibits lipopolysaccharide-mediated neutrophil-dependent vascular injury and contributes to the suppression of the allergic inflammatory response by impeding the infiltration of neutrophils and eosinophils while preventing mast cell degranulation. Its interactions, particularly when tyrosine phosphorylated, with SH2 domain-containing phosphatases PTPN6/SHP-1 and PTPN11/SHP-2 enhance the inhibition of mast cell activation.
Technical Parameters
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Species Human
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Source HEK293
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Tag C-mFc
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Accession
AAH26309.1 (Q22-E259)
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Gene ID11006
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Molecular Construction
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N-term
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LILRB4 (Q22-E259)
Accession # AAH26309.1 -
mFc
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C-term
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Protein Length
Extracellular Domain
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Synonyms
LILRB4; CD85 Antigen-Like Family Member K; Leukocyte Immunoglobulin Like Receptor B4; Monocyte Inhibitory Receptor HM18; LIR-5; Immunoglobulin-Like Transcript 3; ILT3; Leucocyte Ig-Like Receptor B4; LIR5; ILT-3; CD85k; HM18; Leukocyte Immunoglobulin-Like
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AA Sequence
QAGPLPKPTLWAEPGSVISWGNSVTIWCQGTLEAREYRLDKEESPAPWDRQNPLEPKNKARFSIPSMTEDYAGRYRCYYRSPVGWSQPSDPLELVMTGAYSKPTLSALPSPLVTSGKSVTLLCQSRSPMDTFLLIKERAAHPLLHLRSEHGAQQHQAEFPMSPVTSVHGGTYRCFSSHGFSHYLLSHPSDPLELIVSGSLEGPRPSPTRSVSTAAGPEDQPLMPTGSVPHSGLRRHWE
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Predicted Molecular Mass
53.3 kDa
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Molecular Weight
Approximately 60-66 kDa, based on SDS-PAGE under reducing conditions, due to the glycosylation.
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Glycosylation
Yes
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Purity
≥ 95%, as determined by reducing SDS-PAGE.
Product Properties
Lyophilized powder.
<1 EU/μg, determined by LAL method.
It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).
Stored at -20°C for 2 years from date of receipt. 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.
Documentation
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
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