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Official Full Name: CD1e molecule
Also known as: R2; CD1A
This gene encodes a member of the CD1 family of transmembrane glycoproteins that are structurally related to major histocompatibility complex (MHC) proteins and form heterodimers with β-2 microglobulin. The CD1 protein mediates the self or microbial origin of major lipid and glycolipid antigens to T cells. The human genome contains five CD1 family genes, which are arranged on chromosome 1. CD1 family members are thought to differ in their cellular localization and specificity for specific lipid ligands. The protein encoded by this gene is localized in the Golgi compartment, endosomes and lysosomes, and is cleaved into a stable soluble form. Soluble forms are required for intracellular processing of some glycolipids, allowing their conversion into forms that other CD1 family members can present. A number of alternatively spliced transcript variants encoding different isoforms have been described. Other transcript variants have also been identified; however, their biological validity has not been established.