Table 2.
Putative orthologues of the iron uptake systems from Escherichia coli identified in Xanthomonas citri. (−) not identified or (nr) amino acid sequence identity with coverage and similarity lower to 70% and 30%, respectively
| E. coli protein | KEGG entry | Protein predicted function | Protein name in X. citri | KEGG entry | Protein predicted function | Query coverage %/sequence identity E. coli × X. citri |
|---|---|---|---|---|---|---|
| Outer membrane receptors | ||||||
| FhuA | b0150 | Iron complex outer membrane receptor | FhuA | XAC2185 | Ferrichrome-iron receptor | 91/40 |
| FepA | b0584 | Ferrienterobactin outer membrane transporter | PfeA | XAC3620 | Siderophore receptor protein | 99/47 |
| FecA | b4291 | TonB-dependent outer membrane ferric citrate transporter and signal transducer | FecA | XAC3176 | Citrate-dependent iron transporter | 72/32 |
| BtuB | b3966 | Vitamin B12/cobalamin outer membrane transporter | BtuB | XAC3194 | Outer membrane receptor for transport of vitamin B12 | 98/34 |
| ATP-binding cassette transporters | ||||||
| FhuD | b0152 | Iron(3+)-hydroxamate import ABC transporter periplasmic-binding protein | nr | - | - | - |
| FhuB | b0153 | Iron(3+)-hydroxamate import ABC transporter permease | nr | - | - | - |
| FhuC | b0151 | Iron complex transport system ATP-binding protein | ABC | XAC3669 | ABC transport ATP-binding protein | 85/26 |
| FepB | b0592 | Ferrienterobactin ABC transporter periplasmic-binding protein | nr | - | - | - |
| FepD | b0590 | Iron complex transport system permease protein | nr | - | - | - |
| FepG | b0589 | Iron complex transport system permease protein | nr | - | - | - |
| FepC | b0588 | Iron complex transport system ATP-binding protein | PstB | XAC1574 | Phosphate ABC transport ATP-binding protein | 76/32 |
| FecB | b4290 | Iron complex transport system substrate-binding protein | nr | - | - | - |
| FecC | b4289 | Iron complex transport system permease protein | nr | - | - | - |
| FecD | b4288 | Iron complex transport system permease protein | nr | - | - | - |
| FecE | b4287 | Iron complex transport system ATP-binding protein | CysA | XAC1020 | Sulfate ABC transporter ATP-binding protein | 86/36 |
| BtuC | b1711 | Vitamin B12 transport system permease protein | nr | - | - | - |
| BtuD | b1709 | Vitamin B12 transport system ATP-binding protein | YhbG | XAC2971 | Lipopolysaccharide export system ATP-binding protein | 84/28 |
| BtuE | b1710 | Glutathione peroxidase | BtuE | XAC4346 | Glutathione peroxidase | 99/47 |