TABLE 4.
Escherichia coli alternative σ factors and regulators and their homologs in Pseudomonas aeruginosa and Acinetobacter spp.
| Function(s) |
E. coli proteins |
Homologs (% sequence identitya) |
||||||
|---|---|---|---|---|---|---|---|---|
|
P. aeruginosa |
A. baylyi |
A. baumannii |
||||||
| σ factor | Anti-σ factor(s)/regulator(s) | σ factor | Anti-σ factor(s)/regulator(s) | σ factor | Anti-σ factor(s)/regulator(s) | σ factor | Anti-σ factor(s)/regulator(s) | |
| Cell envelope stress response, mucoid phenotype | RpoE (σE) | RseA | PA0762 (AlgU) (65) | PA0763 (MucA) (34) | ACIAD2627 (24) | —b | ABAYE0897 (24) | — |
| development | RseB | PA0764 (MucB) (30) | ACIAD0935 (26) | ACIAD0936 (17) | ||||
| Regulation of flagellum assembly | RpoF (σ28) | FlgM | PA1455 (53) | PA3351 (23) | — | — | — | — |
| Heat shock response | RpoH (σ32) | — | PA0376 (59) | — | ACIAD1311 (58) | — | ABAYE1217 (59) | — |
| Regulation of nitrogen metabolism, metabolism of aromatic compounds, pathogenesis | RpoN (σ54) | RpoX (Hpf) | PA4462 (54) | PA4463 (54) | ACIAD0657 (46) | ACIAD0658 (34) | ABAYE3136 (47) | ABAYE3135 (32) |
| Regulation of stationary phase and stress response proteins | RpoS (σ38) | — | PA3622 (76) | — | — | — | — | — |
| Iron uptake, unidentified functions | FecI | FecR | PA3899 (52) | PA3900 (36) | ACIAD1161 (34) | ACIAD1162 (19) | AB57_0985/ACICU_00873 (35) | AB57_0986/ACICU00874 (30) |
| PA1912 (49) | PA1911 (37) | ACIAD1778 (43) | ACIAD1779 (27) | |||||
| PA0472 (46) | PA0471 (30) | ACIAD1469 (33) | ACIAD1471 (25) | |||||
| PA2468 (50) | PA2467 (37) | |||||||
| PA2050 (45) | PA2051 (28) | |||||||
| PA4896 (42) | PA4895 (36) | |||||||
| PA2093 (38) | PA2094 (26) | |||||||
| PA1300 (36) | PA1301 (28) | |||||||
| PA2387 (34) | PA2388 (24) | |||||||
| PA3410 (28) | PA3409 (41) | |||||||
| PA2426 (31) | — | |||||||
| PA0149 (26) | PA0150 (35) | |||||||
| PA2896 (31) | — | |||||||
| PA0675 (25) | PA0676 (26) | |||||||
| PA1776 (23) | — | |||||||
a
Sequence identity with equivalent E. coli proteins.
b
—, not applicable or protein not present in organism.