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. 2017 Oct 12;8:1937. doi: 10.3389/fmicb.2017.01937

Figure 3.

Figure 3

The sortase mechanism in gram-positive bacteria. As shown above for C. diphtheriae, pilins are thought to be translocated upon the cytoplasmic membrane (Export) and hold within the secretory pathway by the cell wall sorting signal CWSS (Retention). These biomolecules (cysteine transpeptidases) join proteins conducting an appropriate sorting signal to strategically positioned amino groups on the cell surface.