Human Sialic Acid Binding Ig Like Lectin 9 (SIGLEC9) Protein

Background

SIGLEC9 is widely expressed on neutrophils, monocytes, and subsets of T cells. It binds preferentially to α2-3-linked sialic acids on glycoproteins and glycolipids. SIGLEC9 plays a dual role in modulating immune responses by dampening excessive inflammation through its ITIM domains and enhancing the clearance of apoptotic cells by phagocytes. This protein is critical in host-pathogen interactions, as many pathogens exploit sialic acid-binding properties to evade immune detection. SIGLEC9 is being explored as a target in inflammatory diseases and cancer due to its role in modulating immune activation and resolution.