Human Sialic Acid Binding Ig Like Lectin 7 (SIGLEC7) Protein

Background

SIGLEC7, also known as p75/AIRM1, is an inhibitory receptor expressed on natural killer (NK) cells and some myeloid cells. It binds preferentially to α2-8-linked disialic acids found on both self and microbial surfaces, helping to suppress inappropriate immune activation. SIGLEC7 transmits inhibitory signals via immunoreceptor tyrosine-based inhibitory motifs (ITIMs), reducing NK cell-mediated cytotoxicity. This protein plays a critical role in maintaining self-tolerance and modulating responses to cancer and viral infections. It is frequently studied for its involvement in tumor immune evasion and as a target for immunotherapy.