Anti-CD14 Antibody Picoband®

CD14 is a single-copy gene encoding 2 protein forms: a 50- to 55-kD glycosylphosphatidylinositol-anchored membrane protein (mCD14) and a monocyte or liver-derived soluble serum protein (sCD14) that lacks the anchor. This gene is located at bands 5q23-q31. The protein encoded by this gene is a surface antigen that is preferentially expressed on monocytes/macrophages. CD14 acts as a co-receptor (along with the Toll-like receptor TLR 4 and MD-2) for the detection of bacterial lipopolysaccharide (LPS) . CD14 can bind LPS only in the presence of lipopolysaccharide-binding protein (LBP) . Although LPS is considered its main ligand, CD14 also recognizes other pathogen-associated molecular patterns.

Monocyte differentiation antigen CD14 ; Myeloid cell-specific leucine-rich glycoprotein; CD14; Monocyte differentiation antigen CD14, urinary form; Monocyte differentiation antigen CD14, membrane-bound form; CD14

E. coli-derived human CD14 recombinant protein (Position: N65-D327) . Human CD14 shares 69.8% and 66.8% amino acid (aa) sequence identity with mouse and rat CD14, respectively.

Detected on macrophages (at protein level) (PubMed:1698311) . Expressed strongly on the surface of monocytes and weakly on the surface of granulocytes; also expressed by most tissue macrophages. .

Coreceptor for bacterial lipopolysaccharide (PubMed:1698311, PubMed:23264655) . 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:20133493, PubMed:23264655) . Acts via MyD88, TIRAP and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response (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 (PubMed:16880211) . Binds electronegative LDL (LDL (-) ) and mediates the cytokine release induced by LDL (-) (PubMed:23880187) . .

1. Goyert, S. M., Ferrero, E., Rettig, W. J., Yenamandra, A. K., Obata, F., Le Beau, M. M. The CD14 monocyte differentiation antigen maps to a region encoding growth factors and receptors. Science 239: 497-500, 1988. 2. LeVan, T. D., Bloom, J. W., Bailey, T. J., Karp, C. L., Halonen, M., Martinez, F. D., Vercelli, D. A common single nucleotide polymorphism in the CD14 promoter decreases the affinity of Sp protein binding and enhances transcriptional activity. J. Immun. 167: 5838-5844, 2001. 3. Wright, S. D. CD14: a leukocyte membrane protein that functions in the response to endotoxin. (Abstract) FASEB J. 4: A1848 only, 1990.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.