Table 1.
Cell-associated factors involved in QS-controlled behaviorsa.
| Behavior/phenotype | Cell-associated factor | Species |
|---|---|---|
| ANTICIPATION OF STRESS AT HIGH CELL DENSITY | ||
| Oxidative stress resistance | Catalase, superoxide dismutase, dehydrogenase | P. aeruginosa |
| Antibiotic resistance | Aminoglycoside acetyltransferase | P. stewartii |
| Type VI secretion | Immunity proteins | B. thailandensis |
| Phage resistance | Phage receptor OmpK, CRISPR-Cas immunity | V. anguillarum, |
| P. aeruginosa | ||
| Competence | Competence proteins | B. subtilis |
| Sporulation | Sporulation proteins | B. subtilis |
| Metabolic slowing | Enzymes involved in glucose uptake, glycolysis, oxidative phosphorylation, nucleotide metabolism | B. glumae |
| Alternative carbon catabolism | Maltose-fermentation and glyoxylate-cycle enzymes | Y. pestis |
| Biofilm dispersal | Surfactant putisolvin, flagella | P. putida |
| METABOLIC CHANGES ASSOCIATED WITH SECRETION | ||
| Type II secretion | Xcp secretory apparatus | P. aeruginosa |
| Type II secretion | Secretory apparatus | B. cepacia |
| Cyanide production | Hydrogen cyanide synthase | P. aeruginosa |
| Rhamnolipid secretion | Rhamnosyl transferase | P. aeruginosa |
| Cps biosynthesis | Exopolysaccharide | P. stewartii |
| Cyanide resistance | Alternative cytochrome c oxidase | P. aeruginosa |
| AHL metabolism | Serine hydroxymethyltransferases, glycine cleavage system proteins | P. aeruginosa |
| Adenosine, inosine catabolism | Nucleoside hydrolase (Nuh) | P. aeruginosa |
| Carbon compound catabolism | Cytochrome oxidases from oxidative phosphorylation, Entner-Doudoroff pathway enzymes | P. aeruginosa |
| LEAKY FUNCTIONS WITH PUBLIC AND PRIVATE BENEFITS | ||
| Oxidative stress resistance | Catalase, superoxide dismutase | P. aeruginosa |
| Acetate switch | Acetyl-CoA synthase | V. fischeri |
| Antibiotic resistance | Aminoglycoside acetyltransferase | P. stewartii |
| Fructose catabolism | Invertase | Yeast |
| Iron acquisition | Siderophores | E. coli |
| P. aerginosa | ||
| Adenosine, inosine catabolism | Leaking periplasmic Nuh or its metabolites | P. aeruginosa |
a
We list behaviors and associated factors (e.g., in the form of proteins) according to the classification and the examples cited in the main text. Some behaviors fit into more than one class.