Human CLEC9A Protein, hFc tag

C-type lectin domain family 9 member A is a protein that in humans is encoded by the CLEC9A gene. CLEC9A is a group V C-type lectin-like receptor (CTLR) that functions as an activation receptor and is expressed on myeloid lineage cells. CLEC9A ligation enhances antigen uptake and processing, leading to presentation on MHC class I and cytotoxic T cell (CTL) priming. Its recognition of filamentous actin in dead cells is important for triggering an immune response to necrotic cell debris. CLEC9A is also required for the presentation of viral proteins and the subsequent CTL-mediated killing of virus-infected cells. CLEC9A signaling triggers activation of the tyrosine kinase Syk.