Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IB subfamily.
Belongs to the bacterial ribosomal protein bL36 family.
TetR is the repressor of the tetracycline resistance element; its N-terminal region forms a helix-turn-helix structure and binds DNA. Binding of tetracycline to TetR reduces the repressor affinity for the tetracycline resistance gene (tetA) promoter operator sites.