TLR2 is mobilized into an apical lipid raft receptor complex to signal infection in airway epithelial cells
J. Clin. Invest. Grace Soong, et al. 113:1482 doi:10.1172/JCI20773 [Go to this article.]

Figure 2
Identification of apically exposed components on polarized 16HBE cells exposed to bacteria. (A) Surface-exposed components of the airway cells were biotinylated under control conditions (–) and after a 1-hour exposure to S. aureus (+). After immunoprecipitation with streptavidin, Western hybridizations were done and asialoGM1, TLR2, and caveolin-1 (Cav-1), as well as the kinases IRAK-1 and TRAF6, were detected. (B) Coimmunoprecipitation studies demonstrate TLR2 but not TLR4 in a receptor complex along with asialoGM1. Coimmunoprecipitations of whole-cell lysates from control and S. aureus–stimulated cells were done using anti–caveolin-1, anti-TLR2, and anti-asialoGM1 as capture antibodies with screening for expected components of the TLR pathway, MyD88 and IRAK-1, as well as c-Src and TLR4.