FIG 1.

Proteins involved in F. johnsoniae gliding motility and protein secretion. SprB and RemA (orange) are motility adhesins that are propelled along the cell surface. SprC and SprD support SprB function. GldK, GldL, GldM, GldN, SprA, SprE, and SprT (blue) are components of the T9SS that are required for the secretion of SprB and RemA and for motility. The T9SS also secretes the chitinase ChiA (white), which is not involved in motility. PorV is needed for the secretion of RemA and ChiA but not SprB. SprF is needed for the secretion of SprB but not RemA or ChiA. Proteins in green (GldA, GldB, GldD, GldF, GldG, GldH, GldI, and GldJ) are also required for gliding motility. Black lines indicate lipid tails on lipoproteins. Proteins are not drawn to scale, stoichiometry of components is not known, and it is not known whether any of the lipoproteins localize to the cytoplasmic membrane (CM) instead of the outer membrane (OM), as shown.