Key Product Details

Species Reactivity

Mouse

Applications

CyTOF-ready, Flow Cytometry

Label

FITC (Excitation = 495 nm, Emission = 519 nm)

Antibody Source

Monoclonal Hamster IgG Clone # 2F1

Concentration

Please see the vial label for concentration. If unlisted please contact technical services.

View all KLRG1 Antibodies »

Product Specifications

Immunogen

IL-2 activated NK cells from C57/BL6 mice
Accession # O88713

Specificity

Detects mouse KLRG1 in direct ELISAs.

Clonality

Monoclonal

Host

Hamster

Isotype

IgG

Applications for KLRG1 Antibody (2F1) [FITC]

Application
Recommended Usage

CyTOF-ready

Optimal dilutions of this antibody should be experimentally determined.

Flow Cytometry

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 A or G purified from hybridoma culture supernatant

Formulation

PBS

Preservative

0.05% Sodium Azide

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.

Background: KLRG1

KLRG1 (killer cell lectin-like receptor G1), also known as CLEC15A and MAFA, belongs to the KLR family. KLRG1 is a lectin-like inhibitory receptor that is a single pass type II transmembrane protein (1). KLRG1 functions in innate immunity and has an inhibitory role on the function of natural killer (NK) cells and T cells that is induced by binding to their non-MHC ligands (1,2). The KLRG1 protein exists as both a monomer and homodimer and is expressed as an inhibitory receptor on NK cells as well as subsets of CD4+ and CD8+ T cells, gammadelta T cells, and alphabeta T cells (1,3,4). The human KLRG1 protein is 195 amino acids (aa) in length with a theoretical molecular weight (MW) of 21.8 kDa (2). Given KLRG1 protein glycosylation and disulfide bonds, the observed molecular weight often ranges from 30-38 kDa. The human KLRG1 protein consists of a cytoplasmic domain at 1-38 aa with one immunoreceptor tyrosine-based inhibitory motif (ITIM) at 5-10 aa, a transmembrane segment at 39-59 aa, and an extracellular domain (ECD) at 60-195 aa with one C-type lectin domain (CTLD) at 82-185 aa (2).

KLRG1's primary ligand is E-cadherin, which is expressed on non-neural epithelial tissues, but the KLRG1 receptor also recognizes both N- and R-cadherin expressed in nervous system tissues (1,3,5,6). E-cadherin binding of KLRG1 leads to ITIM triggering and, ultimately, either reduced T cell proliferation or decreased NK cell cytotoxicity (3,5,6). More precisely, upon differentiation of CD8+ T cells, cells switch from signaling through CD28 and instead signal through the inhibitory KLRG1 receptor molecule (3,4). Phosphorylation of KLRG1's ITIM causes recruitment of two phosphatases, SH2-containing inositol polyphosphate 5-phoshate (SHIP-1) and SH-2 containing protein-tyrosine phosphatase 2 (SHP-2) (3,5). The effectors SHIP-1 and SHP-2 degrade PIP3 to PIP2, preventing Akt phosphorylation and inhibiting proliferation (3,5,6). Conversely, when KLRG1 signaling is blocked in highly differentiated T cells, Akt signaling is restored and cell proliferation resumes (3). An increase in highly differentiated T cells is observed in many age-related infections such as meningitis, pneumonia, and influenza, which also correlates with elevated KLRG1 levels (3). This observation suggests that KLRG1 may be a potential immunotherapeutic target, especially for vaccinations which typically have decreased response in aged patients (3).

References

1. Li Y, Hofmann M, Wang Q, Teng L, Chlewicki LK, Pircher H, Mariuzza RA. Structure of natural killer cell receptor KLRG1 bound to E-cadherin reveals basis for MHC-independent missing self recognition. Immunity. 2009 Jul 17;31(1):35-46. http://doi.org/10.1016/j.immuni.2009.04.019

2. Uniprot(Q96E93)

3. Henson SM, Akbar AN. KLRG1--more than a marker for T cell senescence. Age (Dordr). 2009 Dec;31(4):285-91. http://doi.org/10.1007/s11357-009-9100-9.

4. Thimme R, Appay V, Koschella M, Panther E, Roth E, Hislop AD, Rickinson AB, Rowland-Jones SL, Blum HE, Pircher H. Increased expression of the NK cell receptor KLRG1 by virus-specific CD8 T cells during persistent antigen stimulation. J Virol. 2005 Sep;79(18):12112-6.http://doi.org/10.1128/JVI.79.18.12112-12116.2005.

5. Borys SM, Bag AK, Brossay L, Adeegbe DO. The Yin and Yang of Targeting KLRG1+ Tregs and Effector Cells. Front Immunol. 2022 Apr 29;13:894508. http://doi.org10.3389/fimmu.2022.894508.

6. Van den Bossche J, Malissen B, Mantovani A, De Baetselier P, Van Ginderachter JA. Regulation and function of the E-cadherin/catenin complex in cells of the monocyte-macrophage lineage and DCs. Blood. 2012 Feb 16;119(7):1623-33. http://doi.org/10.1182/blood-2011-10-384289.

Long Name

Killer Cell Lectin-like Receptor Subfamily G Member 1

Alternate Names

CLEC15A, MAFA, MAFAL

Additional KLRG1 Products

Product Documents for KLRG1 Antibody (2F1) [FITC]

Product Datasheets

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Download SDS

Product Specific Notices for KLRG1 Antibody (2F1) [FITC]

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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