The E. coli HicB Antitoxin Contains a Structurally Stable Helix-Turn-Helix DNA Binding Domain.
Manav, M.C., Turnbull, K.J., Jurenas, D., Garcia-Pino, A., Gerdes, K., Brodersen, D.E.(2019) Structure 27: 1675-1685.e3
- PubMed: 31495532 
- DOI: 10.1016/j.str.2019.08.008
- Primary Citation of Related Structures:  
6HPB, 6HPC - PubMed Abstract: 
The E. coli hicAB type II toxin-antitoxin locus is unusual by being controlled by two promoters and by having the toxin encoded upstream of the antitoxin. HicA toxins contain a double-stranded RNA-binding fold and cleaves both mRNA and tmRNA in vivo, while HicB antitoxins contain a partial RNase H fold and either a helix-turn-helix (HTH) or ribbon-helix-helix domain ...