Table 1.
Cell surface signaling systems.1
| Organism | Iron carrier | Outer membrane receptor | Sigma factor | Anti/Pro sigma factor |
|---|---|---|---|---|
| E. coli | Citrate | FecA | FecI | FecR |
| P. aeruginosa | Pyoverdine | FpvA | FpvI2, PvdS2 | FpvR |
| P. aeruginosa | Ferrioxamine B | FoxA | FoxI | FoxR |
| P.aeruginosa | Ferrichrome | FiuA | FiuI | FiuR |
| P. putida 5 | Aerobactin | IutA | IutY4 | IutY4 |
| P. putida | Pseudobactin BN8 | PupB | PupI | PupR |
| P. putita | Pseudobactin 358 | PupA | PupI | PupR |
| S. marcescens | heme | HasR | HasI | HasS |
1
The table contains a selection of well-studied systems that are discussed in this review. Many more exist, for example 14 in P. aeruginosa (Koebnik 2005).
2,3
Two ECF sigma factors regulate pyoverdine synthesis and transport. 4The YutY polypeptide is composed of an N-terminal sigma factor and a C-terminal anti-sigma factor. 5This strain was renamed Pseudomonas capeferrum