Table 2.
Classification of the gene members of the cluster II in Figure 3
| Gene locus | Gene ID | Description | reference |
| Category A: Proven | |||
| yfeABCD | YPO2439-2442 | Inorganic iron and manganese binding/transport system | [36] |
| yfuABC | YPO2958-2960 | Inorganic iron transport system | [37] |
| ybt locus | YPO1906-1916 | Siderophore-dependent Yersiniabactin biosynthesis and transport | [74] |
| hmuRSTUV | YPO0279-0283 | Heme transport system | [38] |
| TonB-exbB-exbD | YPO2193, YPO0682-0683 | TonB-ExbB-ExbD complex | [75] |
| yiuABCR | YPO1310-1313 | Putative siderophore ABC-transporter | [76] |
| ysuFJIHG | YPO1528-1532 | Siderophore biosynthetic enzyme system | [76] |
| Category B: Putative | |||
| fitABCD | YPO4022-4025 | Putative iron ABC transporter | |
| Others | YPO0778-0776 | putative siderophore biosysnthesis protein | |
| YPO1011-1012 | putative TonB-dependent outer membrane receptor | ||
| YPO0956 | Putative hydroxamate-type ferri siderophore receptor | ||
| YPO3340 | Putative ferric siderophore receptor (pseudogene) | ||
| Category C: Hypothetical | |||
| sufABCDSE | YPO2399-2404 | Fe-S cluster assembly | |
| nrdHIEF | YPO2648-2651 | Ribonucleoside-diphosphate reductase | |
| yacK | YPO3409 | Putative exported protein | |
| yhhN-zntA | YPO3819-3820 | Zinc, lead, cadmium and mercury transporting ATPase | |
| Others | YPO0284 | ||
| YPO0988 | Putative membrane protein | ||
| YPO1003 | Putative exported protein | ||
| YPO1735 | Putative ABC transporter (ATP-binding protein) | ||
| YPO1854-1856 | Putative membrane or exported protein | ||
| YPO2163 | Putative nitroreductase | ||
| YPO3339 | Hypothetical protein | ||