The MHC class I-specific inhibitory receptors on human and mouse NK cells have surprisingly different structures. The mouse receptors (Ly-49) are type II transmembrane glycoproteins of the C-type lectin family, whereas the human receptors (killer cell inhibitory receptors (KIR)) belong to the Ig superfamily. This difference prompted a search for Ig-like inhibitory receptors in mice. Here we show that gp49, a mouse mast cell protein of unknown function but with sequence similarity to KIR, is expressed in NK cells. The gp49 cytoplasmic tail, containing a sequence related to an inhibitory motif shared by KIR and Ly-49, delivered a strong inhibitory signal in both human and mouse NK cells when substituted for a KIR cytoplasmic tail. These data show that Ig-like receptors with inhibitory properties exist in both species and that mouse mast and NK cells may recognize common inhibitory ligands.
Type I transmembrane receptor with inhibitory function in mouse mast cells and NK cells.
S. Rojo,D. Burshtyn,Eric O Long,N. Wagtmann
Published 1997 in Journal of Immunology
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- Publication year
1997
- Venue
Journal of Immunology
- Publication date
1997-01-01
- Fields of study
Biology, Medicine, Chemistry
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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