Bacterial transcription activator, effector binding domain. This domain is found in the probable effector binding domain of a number of different bacterial transcription activators.and is also present in some DNA gyrase inhibitors. The absence of a HTH motif in the DNA gyrase inhibitors is thought to indicate the fact that these do not bind DNA.
GyrI-like small molecule binding domain. This family contains the small molecule binding domain of a number of different bacterial transcription activators. This family also contains DNA gyrase inhibitors. The GyrI superfamily contains a diad of the SHS2 module, adapted for small-molecule binding. The GyrI superfamily includes a family of secreted forms that is found only in animals and the bacterial pathogen Leptospira.