CD301/CLEC10A

CD301, also known as macrophage galactose-type C-type lectin (MGL, gene CLEC10A), is a type II transmembrane lectin receptor expressed on immature dendritic cells and macrophages. Its single extracellular carbohydrate-recognition domain binds terminal galactose and N-acetylgalactosamine residues in a calcium-dependent manner, including the tumor-associated T and Tn glycans. Through this specificity, CD301 mediates uptake of glycosylated antigens and shapes glycan-dependent immune responses. Expression is characteristic of alternatively activated, M2-like macrophages, and the receptor has been exploited for targeted delivery to macrophages and dendritic cells in tumor and autoimmune models. Internalized ligands are routed to antigen-processing compartments, supporting CD301's role in glycoprotein antigen presentation.