| IPR004358 | Signal transduction histidine kinase-related protein, C-terminal | Domain |
| IPR038515 | Two-component sensor protein CpxA, periplasmic domain superfamily | Homologous Superfamily |
| IPR036097 | Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily | Homologous Superfamily |
| IPR058125 | Sensor histidine kinase CpxA | Family |
| IPR003660 | HAMP domain | Domain |
| IPR050398 | Heme sensor protein HssS/ArlS-like | Family |
| IPR036890 | Histidine kinase/HSP90-like ATPase superfamily | Homologous Superfamily |
| IPR003661 | Signal transduction histidine kinase, dimerisation/phosphoacceptor domain | Domain |
| IPR058126 | Sensor histidine kinase CpxA, ATPase domain | Domain |
| IPR003594 | Histidine kinase/HSP90-like ATPase domain | Domain |
| IPR005467 | Histidine kinase domain | Domain |
| IPR032404 | Two-component sensor protein CpxA, periplasmic domain | Domain |