The function of CD1E (CD1e molecule, ENSG00000158488) is as follows. T-cell surface glycoprotein CD1e, soluble binds diacetylated lipids, including phosphatidyl inositides and diacylated sulfoglycolipids, and is required for the presentation of glycolipid antigens on the cell surface. The membrane-associated form is not active. {ECO:0000269|PubMed:10948205, ECO:0000269|PubMed:16311334, ECO:0000269|PubMed:21788486}.