Figure 4.
(A) Schematic representation of the signal transduction cascade of quorum sensing stimulated by the ComX pheromone in B. subtilis. (B) Amino acid sequences of the aspartate-rich motif and the pseudo aspartate-rich motif in ComQ from seven Bacillus strains. Essential amino acid residues for function are shown in bold and colored blue. EcGGPPS is a geranylgeranyl diphosphate synthase derived from Escherichia coli ISC56. It’s essential amino acid residues for function are shown in boldface, and the aspartate-rich motifs are underlined.