2B4/CD244/SLAMF4 Antibody (2B4.69) [CoraFluor™ 1]
Novus Biologicals, part of Bio-Techne | Catalog # NB100-65889CL1
Conjugate
Catalog #
Key Product Details
Species Reactivity
Human
Applications
Flow Cytometry, Immunoprecipitation
Label
CoraFluor 1
Antibody Source
Monoclonal Mouse IgG1 Clone # 2B4.69
Concentration
Please see the vial label for concentration. If unlisted please contact technical services.
Product Specifications
Immunogen
CD244 Fusion protein
Localization
Cell Membrane; single-pass type I membrane protein (potential).
Specificity
NB100-65889 is specific for the CD244 cell surface antigen, also known as natural killer receptor 2B4 (NKG2B4). The glycoprotein CD244 is a member of the SLAM family of receptors which is expressed on natural killer (NK) cells, gamma delta T cells, CD14+ monocytes, and a subset of CD8+ T cells. CD244 was originally identified as an activating receptor on NK cells, although recent studies suggest that the receptor may have a wide range of activities including NK cell activation, costimulation, or even inhibition, depending on the cell type and stage of differentiation. The ligand of 2B4 is CD48, a GPI-anchored membrane protein also belonging to the SLAM family.
Clonality
Monoclonal
Host
Mouse
Isotype
IgG1
Description
CoraFluor(TM) 1 is a high performance terbium-based TR-FRET (Time-Resolved Fluorescence Resonance Energy Transfer) or TRF (Time-Resolved Fluorescence) donor for high throughput assay development. CoraFluor(IM) 1 absorbs UV light at approximately 340 nm, and emits at approximately 490 nm, 545 nm, 585 nm and 620 nm. It is compatible with common acceptor dyes that absorb at the emission wavelengths of CoraFluor(TM) 1. CoraFluor(TM) 1 can be used for the development of robust and scalable TR-FRET binding assays such as target engagement, ternary complex, protein-protein interaction and protein quantification assays.
Applications for 2B4/CD244/SLAMF4 Antibody (2B4.69) [CoraFluor™ 1]
Application
Recommended Usage
Flow Cytometry
Optimal dilutions of this antibody should be experimentally determined.
Immunoprecipitation
Optimal dilutions of this antibody should be experimentally determined.
Application Notes
Optimal dilution of this antibody should be experimentally determined.
Formulation, Preparation, and Storage
Purification
Protein G purified
Formulation
PBS
Preservative
No Preservative
Concentration
Please see the vial label for concentration. If unlisted please contact technical services.
Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store at 4C in the dark. Do not freeze.
Background: 2B4/CD244/SLAMF4
The 2B4 receptor has both activating and inhibitory signaling properties (1,4). 2B4's ligand is CD48, which is expressed on hematopoietic cells (4, 5). When bound to CD48, subsequent phosphorylation of the ITSMs occurs, followed by recruitment of SH-2-containing adaptor protein (SAP) and Fyn, leading to phosphorylation of PLCgamma and Vav1, and resulting in NK cell activation (4). In the absence of SAP, Src homology region 2-containing protein tyrosine phosphatases (SHP) get recruited and inhibits NK cell activation (4). In the context of infection such as Epstein-Barr virus (EBV), when lacking SAP, 2B4 has been shown to have an inhibitory function via impaired T cell cytotoxicity against EBV-infected cells (6). While 2B4 has a role in eliciting CD8+ T cell response, overexpression of 2B4 can lead to T cell exhaustion in states of chronic infection (6). Studies have suggested that the antibody blockade of the 2B4-CD48 interaction might enhance T cell and NK cell function, however given both the activating and inhibitory properties of the 2B4 receptor, more research needs to be done to prevent unwanted effects (6).
References
1. Buller CW, Mathew PA, Mathew SO. Roles of NK Cell Receptors 2B4 (CD244), CS1 (CD319), and LLT1 (CLEC2D) in Cancer. Cancers (Basel). 2020 Jul 1;12(7):1755. https://doi.org/10.3390/cancers12071755
2. Catakovic K, Klieser E, Neureiter D, Geisberger R. T cell exhaustion: from pathophysiological basics to tumor immunotherapy. Cell Commun Signal. 2017;15(1):1. https://doi.org/10.1186/s12964-016-0160-z
3. Uniprot (Q9BZW8)
4. Chen Y, Lu D, Churov A, Fu R. Research Progress on NK Cell Receptors and Their Signaling Pathways. Mediators Inflamm. 2020 Jul 24;2020:6437057. https://doi.org/10.1155/2020/6437057.
5. Pahima H, Puzzovio PG, Levi-Schaffer F. 2B4 and CD48: A powerful couple of the immune system. Clin Immunol. 2019 Jul;204:64-68. https://doi.org/10.1016/j.clim.2018.10.014.
6. Waggoner SN, Kumar V. Evolving role of 2B4/CD244 in T and NK cell responses during virus infection. Front Immunol. 2012;3:377. https://doi.org/10.3389/fimmu.2012.00377
Alternate Names
CD244, NAIL, NKR2B4, Nmrk, SLAMF4
Gene Symbol
CD244
Additional 2B4/CD244/SLAMF4 Products
Product Documents for 2B4/CD244/SLAMF4 Antibody (2B4.69) [CoraFluor™ 1]
Product Specific Notices for 2B4/CD244/SLAMF4 Antibody (2B4.69) [CoraFluor™ 1]
CoraFluor (TM) is a trademark of Bio-Techne Corp. Sold for research purposes only under agreement from Massachusetts General Hospital. US patent 2022/0025254
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.
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