Toll-like receptor TLR4 and MD-2 bound to lipopolysaccharidePDB ID: 3FXI
Toll-like receptors recognize foreign molecules as part of the innate immune system. This structure includes the extracellular domain of TLR4 bound to the protein MD-2, which together recognize bacterial lipopolysaccharides.
The structural basis of lipopolysaccharide recognition by the TLR4-MD-2 complex
Park, B.S., Song, D.H., Kim, H.M., Choi, B.-S., Lee, H., Lee, J.-O.
Journal: (2009) Nature 458: 1191-1195