Table 3.
Nodulation outer proteins identified in the Sinorhizobium fredii strains HH103, USDA257 and NGR234.
| Nop | Size (kDa) | Function | Detected in Induced Culture Supernatant * | Gene Present in the Sequenced Genome | ||||
|---|---|---|---|---|---|---|---|---|
| HH103 | USDA257 | NGR234 | HH103 | USDA257 | NGR234 | |||
| NopA | ~6 | T3SS pilus | Yes | Yes | Yes | Yes | Yes | Yes |
| NopC | ~11 | Effector | Yes | Yes | Yes | Yes | Yes | Yes |
| NopB | ~21 | T3SS pilus | Yes | Yes | Yes | Yes | Yes | Yes |
| NopI | ~27 | Putative effector | NC | NC | - | Yes | Yes | No |
| NopT | ~28 | Putative effector | NC | NC | Yes | Yes | Yes | Yes |
| NopJ | ~29 | Putative effector | - | - | ND | No | No | Yes |
| NopP | ~32 | Effector | Yes | Yes | Yes | Yes | Yes | Yes |
| NopL | ~37 | Putative effector | Yes | NC | Yes | Yes | Yes | Yes |
| NopX | ~60 | Translocation | Yes | Yes | Yes | Yes | Yes | Yes |
| NopM | ~60 | Putative effector | Yes | NC | Yes | Yes (x2) | Yes | Yes |
| NopD | ~150 | Putative effector | Yes | NC | – | Yes | Yes | No |
* Detection using specific antibodies or mass spectrometry; NC: Not confirmed; ND: Not detected.