CLEC4E is a diverse family of protein which was originally defined by their ability to recognize a wide range of ligand of carbohydrate structure. CLEC4E expressed in macrophages subjected to several types of stress. It plays an essential role in response to trehalose-6,6'-dimycolate (TDM) and activated by a synthetic analogue, trehalose dibehenate (TDB). Recently it was reported that CLEC4E is associated with an immunoreceptor tyrosine-based activation motif-containing Fc receptor gamma-chain (FcR-gamma) and functions as an activating receptor for damaged self- and non-self-pathogenic fungi.