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Hematopoietic cell signal transducer is a protein that in humans is encoded by the HCSTgene.
This gene encodes a transmembrane signaling adaptor that contains a YxxM motif in its cytoplasmic domain. The encoded protein may form part of the immune recognition receptor complex with the C-type lectin-like receptorNKG2D. As part of this receptor complex, this protein may activate phosphatidylinositol 3-kinase dependent signaling pathways through its intracytoplasmic YxxM motif. This receptor complex may have a role in cell survival and proliferation by activation of NK and T cell responses. Alternative splicing results in two transcript variants encoding different isoforms.
Diefenbach A, Tomasello E, Lucas M, et al. (2002). "Selective associations with signaling proteins determine stimulatory versus costimulatory activity of NKG2D". Nat. Immunol. 3 (12): 1142–9. doi:10.1038/ni858. PMID12426565. S2CID14901451.
Chang C, Dietrich J, Harpur AG, et al. (1999). "Cutting edge: KAP10, a novel transmembrane adapter protein genetically linked to DAP12 but with unique signaling properties". J. Immunol. 163 (9): 4651–4. doi:10.4049/jimmunol.163.9.4651. PMID10528161.