| P0ACT4 | n/a | 2x9d | ITC | A | 1209 | e2x9dA1 | HTH | HTH | Three-helical HTH | TetR_N |
| P0ACT4 | n/a | 2x9d | ITC | A | 1209 | e2x9dA2 | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | TetR_C_1 |
| P0ACT4 | n/a | 4b1r | ITC | A | 1209 | e4b1rA1 | HTH | HTH | Three-helical HTH | TetR_N |
| P0ACT4 | n/a | 4b1r | ITC | A | 1209 | e4b1rA2 | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | TetR_C_1 |
| P0ACT4 | n/a | 4v2g | ITC | A | 222 | e4v2gA1 | HTH | HTH | Three-helical HTH | TetR_N |
| P0ACT4 | n/a | 4v2g | ITC | A | 222 | e4v2gA2 | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | TetR_C_1 |
| P0ACT4 | n/a | 4v2g | ITC | A | 222 | e4v2gB2 | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | Tetracyclin repressor-like, C-terminal domain | TetR_C_1 |