LAG-3 Antibody (874501) [DyLight 594]

• Reactivity: Hu
• Applications: WB, Flow, CyTOF-ready
• Clone: 874501
• Clonality: Monoclonal
• Host: Mouse
• Conjugate: DyLight 594

LAG-3 Antibody (874501) [DyLight 594] Summary

• Immunogen: Mouse myeloma cell line NS0-derived recombinant human LAG-3 Leu23-Leu450 Accession # P18627
• Specificity: Recognizes the epsilon-chain of the CD3/T cell antigen receptor complex (McMichael, A.J. et al. (1987) Leucocyte Typing III: White Cell Differentiation Antigens, Oxford University Press, New York; Knapp, W. et al. (1989) Leucocyte Typing IV: White Cell Differentiation Antigens, Oxford University Press, New York; Schlossman, S. et al. (1995) Leucocyte Typing V: White Cell Differentiation Antigens, Oxford University Press, New York).
• Isotype: IgG1
• Clonality: Monoclonal
• Host: Mouse
• Gene: LAG3
• Purity: Protein A or G purified from hybridoma culture supernatant

Applications/Dilutions

• Dilutions:
  • CyTOF-reported
  • Flow Cytometry
  • Western Blot
• Application Notes: Optimal dilution of this antibody should be experimentally determined.

Packaging, Storage & Formulations

• Storage: Store at 4C in the dark.
• Buffer: 50mM Sodium Borate
• Preservative: 0.05% Sodium Azide
• Purity: Protein A or G purified from hybridoma culture supernatant

Notes

DyLight (R) is a trademark of Thermo Fisher Scientific Inc. and its subsidiaries.

Alternate Names for LAG-3 Antibody (874501) [DyLight 594]

• CD223 antigen
• CD223
• LAG3
• LAG-3
• lymphocyte activating 3
• lymphocyte activation gene 3 protein
• lymphocyte-activation gene 3
• Secreted lymphocyte activation gene 3 protein
• sLAG-3

Background

LAG-3 (Lymphocyte activation gene-3), also known as CD223, is a member of the immunoglobulin superfamily (IgSF). The mature LAG-3 protein is a 496 amino acid (aa) membrane protein with a 421 aa extracellular region which contains four IgSF domains, a 21 aa transmembrane region and a 54 aa cytoplasmic region. LAG-3 and CD4 molecules share 20% aa sequence homology but have a similar structure (1, 2). Both molecules bind to MHC class II. LAG-3 binds to MHC class II with higher affinity compared to CD4. Both LAG-3 and CD4 genes are located on the distal part of the short arm of chromosome 12.
LAG-3 is an activation-induced molecule, expressed on activated T cells and NK cells, but not on resting T cells. Studies using LAG-3 ^-/- mice have shown significant delay of T cell apoptosis following antigen stimulation and increased size of memory T cells pool following infection (3, 4). It also has been reported that anti-LAG-3 antibodies up-regulate T cell activation by blocking interaction of LAG-3 and MHC class II. The study has demonstrated that LAG-3 is selectively expressed on activated CD4^+CD25^+ T_Reg cells and plays a role in their suppressive activity (5). This evidence indicated, unlike the interaction of CD4 with MHC class II that plays a positive role in T cell activation, LAG-3 binds to MHC class II and negatively regulates T cell activation through LAG-3 signaling. On the other hand, studies have shown that binding of LAG-3 to MHC class II molecules on antigen presenting cells induce maturation of dendritic cells and cytokine secretion by monocytes through MHC class II signal transduction (6). Taken together, LAG-3 may have two major functions, it negatively regulates T cells activation through LAG-3 signaling and stimulates antigen presenting cells which express MHC class II.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Bioinformatics

• Gene Symbol: LAG3