NCR1 encodes NKp46, a major activating receptor on natural killer (NK) cells that plays crucial roles in immune surveillance and tumor control. NKp46 functions as a cytotoxicity-triggering receptor that recognizes danger-associated molecular patterns, particularly ecto-calreticulin (ecto-CRT) on endoplasmic reticulum-stressed cells 1. This recognition triggers NK cell signaling and cytotoxic responses against virus-infected, transformed, and senescent cells 1. The receptor mediates direct killing of cancer cells and controls tumor growth through multiple mechanisms, including interferon-γ production that increases fibronectin 1 expression, altering tumor architecture and reducing metastasis formation 2. NKp46 is essential for NK cell responses to viral infections, including human metapneumovirus, where NCR1-deficient mice show impaired viral control 3. Beyond NK cells, NKp46 is expressed on innate lymphoid cells (ILCs) where it amplifies autoimmune organ damage in lupus nephritis by promoting macrophage expansion 4 and regulates intestinal ILC3 survival through ferroptosis pathways 5. The receptor's broad recognition capabilities and central role in immune surveillance make it an attractive target for cancer immunotherapy, with NK cell engagers targeting NKp46 showing therapeutic promise 6.