Toxin-antitoxin operon kacAT of Klebsiella pneumoniae is regulated by conditional cooperativity via a W-shaped KacA-KacT complex

Hongliang Qian, Hao Yu, Peifei Li, E. Zhu, Qingqing Yao, Cui Tai, Zixin Deng, Kenn Gerdes, Xinyi He, Jianhua Gan, Hong-Yu Ou