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  • Title: IgSF13, a novel human inhibitory receptor of the immunoglobulin superfamily, is preferentially expressed in dendritic cells and monocytes.
    Author: Sui L, Li N, Liu Q, Zhang W, Wan T, Wang B, Luo K, Sun H, Cao X.
    Journal: Biochem Biophys Res Commun; 2004 Jul 02; 319(3):920-8. PubMed ID: 15184070.
    Abstract:
    A novel inhibitory receptor of immunoglobin superfamily (IgSF), IgSF member 13 (IgSF13), has been identified from human dendritic cells (DC). IgSF13 is a type I transmembrane protein containing an N-terminal signal peptide, a extracellular region with a single Ig V-like domain, a transmembrane region, and a cytoplasmic tail with two classical immunoreceptor tyrosine-based inhibitory motifs (ITIM), suggesting its inhibitory function. IgSF13 shows significant homology to human CMRF35 and pIgR. IgSF13 gene is mapped to chromosome 17q25.2, very close to that of CMRF35. IgSF13 is preferentially expressed in myelo-monocytic cells, including monocytes, monocyte-derived DC, and monocyte-related cell lines. Upon pervanadate treatment, IgSF13 was hyper-phosphorylated and associated with Src homology-2 domain-containing phosphatases SHP-1 and SHIP, but not SHP-2. The identification of IgSF13 as a novel ITIM-bearing receptor selectively expressed by DC and monocytes suggests that it may be potentially involved in the negative regulation of specific leukocyte population.
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