CLEC4M

(redirected from CD299)

CLEC4M

A gene on chromosome 19p13 that encodes a pathogen-recognition receptor expressed on the surface of immature dendritic cells which is involved in initiating a primary immune response. The receptors are thought to recognise high-mannose N-linked oligosaccharides present on the surface of pathogens (such as HIV-1, HIV-2 and SIV gp120, among others) in a calcium-dependent fashion. Once bound, the receptor mediates endocytosis of the pathogens, which are subsequently degraded in lysosomal compartments. The receptor then returns to the cell membrane surface, and the pathogen-derived antigens are presented to resting T cells via MHC class-II proteins to initiate the adaptive immune response.
References in periodicals archive ?
L-SIGN or DC-SIGNR (also known as CD299, CD209L, and Clec4M) is a type-II transmembrane C-type lectin receptor homologous to DC-SIGN (77% amino acid sequence homology), highly expressed on liver sinusoidal cells, endothelial vascular cells, and in the lymph nodes, but not on DCs, in contrast to DC-SIGN (Table 1 and Figure 1).
L- CD299 Expressed on liver sinusoidal cells, lymph SIGN or CD209L nodes, and endothelial vascular cells, but DC-SIGNR Clec4M not on DCs.