Fig. 2.

Schematic overview of the Gram-positive cell wall together with main macromolecular structures that have been implicated in host–microbe interaction. Specific components of the cell envelope are shown such as peptidoglycan layer, wall and lipoteichoic acids (WTA and LTA), exopolysaccharide (EPS), as well as secreted proteins (SP), membrane proteins (MP), cell wall-associated proteins (CWP), lipoproteins (LPP), membrane-associated proteins (MAP), surface layer proteins (SLP), fimbrial proteins (Fim), and tad proteins (TAD). Furthermore, the sortase-dependent assembly apparatus (SRT) is indicated