T cell interacting, activating receptor on myeloid cells-1 (TARM-1), also known as OSCAR-like transcript-2 protein (OLT-2) is a type 1 membrane protein expressed by neutrophils, inflammatory monocytes, macrophages, and dendritic cells. Mature mouse OLT-2/TARM-1 contains a 242 aa long extracellular domain with two Ig-like C2 domains, a 21 aa long transmembrane domain and a 9 aa long cytoplasmic domain. The extracellular domain of human OLT-2/TARM-1 shares 48% and 49% amino acid (aa) identity with mouse and rat OLT-2/TARM-1 respectively. OLT-2/TARM-1 associates with the ITAM bearing adaptor FcR gamma, but not with DAP10 or DAP12.OLT-2/TARM1 expression is also up-regulated by bone marrow-derived macrophages and dendritic cells following stimulation with TLR agonists in vitro. OLT-2/TARM-1 receptor stimulation on macrophages and neutrophils co-stimulate the secretion of proinflammatory cytokines induced by TLR ligands, such as LPS. OLT-2/TARM-1 Fc fusion protein inhibits anti-CD3 induced CD4⁺ cell activation, suggesting that OLT-2/TARM-1 ectodomain interacts with an unidentified receptor on T cells to inhibit T cell activation (1).

References

Radjabova, V., et al. (2015) J Immunol. 195:3149.

Long Name

T-cell-interacting Activating Receptor on Myeloid Cells 1

Alternate Names

OLT2, TARM1

Entrez Gene IDs

441864 (Human); 245126 (Mouse); 499065 (Rat)

Gene Symbol

TARM1

UniProt

B6A8C7

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This product is provided under an intellectual property license from Life Technologies Corporation. The transfer of this product is conditioned on the buyer using the purchased product solely in research conducted by the buyer, excluding contract research or any fee for service research, and the buyer must not (1) use this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; or (c) manufacturing or quality assurance or quality control, and/or (2) sell or transfer this product or its components for resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@thermofisher.com.

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Human OLT-2/TARM1 Alexa Fluor™ Plus 555-conjugated Antibody

R&D Systems, part of Bio-Techne | Catalog # FAB10059AFP555

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Background: OLT-2/TARM1