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Lanier, L.L. et al.

Lanier, Corliss, Wu, Phillips,

Association of DAP12 with activating CD94/NKG2C NK cell receptors.

While the inhibitory NK cell receptors for MHC class I express immunoreceptor tyrosine-based inhibitory motifs that recruit intracellular tyrosine phosphatases and prevent NK cell effector function, the activating NK cell receptors lack intrinsic sequences required for cellular stimulation. CD94/NKG2C, an activating NK cell receptor of the C-type lectin superfamily that binds to HLA-E, noncovalently associates with DAP12, a membrane receptor containing an immunoreceptor tyrosine-based activating motif. Efficient expression of CD94/NKG2C on the cell surface requires the presence of DAP12, and charged residues in the transmembrane domains of DAP12 and NKG2C are necessary for this interaction. These results provide a molecular basis for the assembly of NK cell receptors for MHC class I involved in cellular activation and inhibition.[1]

References

Association of DAP12 with activating CD94/NKG2C NK cell receptors. Lanier, L.L., Corliss, B., Wu, J., Phillips, J.H. Immunity (1998) [Pubmed]

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