| PF00204 | DNA gyrase B (DNA_gyraseB) | DNA gyrase B | This family represents the second domain of DNA gyrase B which has a ribosomal S5 domain 2-like fold. This family is structurally related to PF01119. | Domain |
| PF02518 | Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase (HATPase_c) | Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase | This family represents the structurally related ATPase domains of histidine kinase, DNA gyrase B and HSP90. | Domain |
| PF16898 | C-terminal associated domain of TOPRIM (TOPRIM_C) | C-terminal associated domain of TOPRIM | - | Family |
| PF01751 | Toprim domain (Toprim) | Toprim domain | - | Family |
| PF00521 | DNA gyrase/topoisomerase IV, subunit A (DNA_topoisoIV) | DNA gyrase/topoisomerase IV, subunit A | - | Family |