Cd14

Domain

The C-terminal leucine-rich repeat (LRR) region is required for responses to smooth LPS.

Function

Coreceptor for bacterial lipopolysaccharide. In concert with LBP, binds to monomeric lipopolysaccharide and delivers it to the LY96/TLR4 complex, thereby mediating the innate immune response to bacterial lipopolysaccharide (LPS) (PubMed:16148141). Acts via MyD88, TIRAP and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response (PubMed:15895089, PubMed:8612135). Acts as a coreceptor for TLR2:TLR6 heterodimer in response to diacylated lipopeptides and for TLR2:TLR1 heterodimer in response to triacylated lipopeptides, these clusters trigger signaling from the cell surface and subsequently are targeted to the Golgi in a lipid-raft dependent pathway (By similarity). Acts as an accessory receptor for M.tuberculosis lipoproteins LprA, LprG and LpqH, in conjunction with coreceptors TLR2 and TLR1. The lipoproteins act as agonists to modulate antigen presenting cell functions in response to the pathogen (PubMed:19362712). Binds electronegative LDL (LDL(-)) and mediates the cytokine release induced by LDL(-) (By similarity).

Tissue Specificity

Detected on peritoneal macrophages (at protein level) (PubMed:8612135). Cell surface expression detected in lung alveolar macrophages, dendritic macrophages and lung macrophages (at protein level) (PubMed:19362712).

Cellular localization

• Cell membrane
• Lipid-anchor
• GPI-anchor
• Secreted
• Membrane raft
• Golgi apparatus
• Soluble, secreted forms seem to exist. They may arise by cleavage of the GPI anchor.

Alternative names

CD14, Monocyte differentiation antigen CD14, Myeloid cell-specific leucine-rich glycoprotein, Cd14

Database links

swissprot:P10810 entrezGene:12475

Other research areas

• Immuno-oncology