LRRC32/GARP Antibody (725226)

Mouse splenocytes were stimulated with 10 μL/mL anti-CD3/anti-CD28, Recombinant Mouse IL-2 (Catalog # 402-ML), and Human TGF-beta 1 (Catalog # 100-B) for 3 days to induce T regulatory cells (Tregs). Tregs were then stained with Rat Anti-Mouse CD4 Alexa Fluor® 488-conjugated Monoclonal Antibody (Catalog # FAB554G), Phycoerythrin-conjugated Anti-FoxP3, and either (A) Rat Anti-Mouse LRRC32/GARP Monoclonal Antibody (Catalog # MAB62291) or (B) Rat IgG1 Isotype Control (Catalog # MAB005) followed by Allophycocyanin-conjugated Anti-Rat IgG Secondary Antibody (Catalog # F0113). Dot plots are gated on CD4+ T cells.

• Reactivity: Mu
• Applications: Flow, CyTOF-ready
• Clone: 725226
• Clonality: Monoclonal
• Host: Rat
• Conjugate: Unconjugated
• Concentration: LYOPH

LRRC32/GARP Antibody (725226) Summary

• Immunogen: Chinese hamster ovary cell line CHO-derived recombinant mouse LRRC32/GARP
  Ile18-Asn628
  Accession # NP_001106850
• Specificity: Detects mouse LRRC32/GARP in direct ELISAs. In direct ELISAs, approximately 50% cross-reactivity with recombinant human (rh) LRRC32 is observed and no cross-reactivity with rhLRRC3, rhLRRC4, or rhNGL-3/LRRC4B is observed.
• Source: N/A
• Isotype: IgG1
• Clonality: Monoclonal
• Host: Rat
• Gene: LRRC32
• Purity Statement: Protein A or G purified from hybridoma culture supernatant

Applications/Dilutions

• Dilutions:
  • CyTOF-ready
  • Flow Cytometry 2.5 ug/10^6 cells

Packaging, Storage & Formulations

• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
• Preservative: No Preservative
• Concentration: LYOPH
• Reconstitution Instructions: Sterile PBS to a final concentration of 0.5 mg/mL.

Notes

Alexa Fluor is a registered trademark of Life Technologies Corporation.

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for LRRC32/GARP Antibody (725226)

• D11S833E
• D11S833Eleucine-rich repeat-containing protein 32
• GARP
• GARPGarpin
• Garpin
• Glycoprotein A repetitions predominantgarpin
• leucine rich repeat containing 32
• LRRC32

Background

Leucine-rich repeat protein 32 (LRRC32), also known as GARP (glycoprotein A repetitions predominant), is an 80 kDa type I transmembrane glycoprotein (1). Mature mouse LRRC32 consists of a 608 amino acid (aa) extracellular domain (ECD) that contains 22 leucine-rich repeats, a 21 aa transmembrane segment, and a 14 aa cytoplasmic domain (2-4). Within the ECD, mouse LRRC32 shares 80 and 94% aa sequence identity with human and rat LRRC32, respectively. LRRC32 is widely expressed during embryogenesis and on adult platelets (4, 5). Among T cells, it is selectively expressed on activated FOXP3+ regulatory T cells (Treg) (6-10). LRRC32 expression promotes the acquisition of a Treg phenotype including reduced cellular proliferation, reduced cytokine secretion, and the capacity to suppress the proliferation of naïve T cells (6-8). LRRC32 binds directly to the TGF-beta latency associated peptide (LAP) and tethers latent TGF-beta on the surface of activated Treg cells (9, 10). The presentation of TGF-beta on Tregs contributes to their ability to suppress naïve T cell proliferation (11).

1. Battaglia, M. and M.G. Roncarolo (2009) Eur. J. Immunol. 39:3296.
2. Ollendorff, V. et al. (1994) Cell Growth Differ. 5:213.
3. Bella, J. et al. (2008) Cell Mol Life Sci. 65:2307.
4. Roubin, R. et al. (1996) Int. J. Dev. Biol. 40:545.
5. Macaulay, I.C. et al. (2007) Blood 109:3260.
6. Wang, R. et al. (2008) PloS ONE 3:e2705.
7. Wang, R. et al. (2009) Proc. Natl. Acad. Sci. 106:13439.
8. Probst-Kepper, M. et al. (2009) J. Cell. Mol. Med. 13:3343.
9. Tran, D.Q. et al. (2009) Proc. Natl. Acad. Sci. 106:13445.
10. Stockis, J. et al. (2009) Eur. J. Immunol. 39:3315.
11. Vignali, D.A. et al. (2008) Nat. Rev. Immunol. 8:523.

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: LRRC32
• Uniprot:
  • NP_001106850()