[Progress in oxyR regulon- the bacterial antioxidant defense system--a review].

The bacterial antioxidant defense system, including oxyR; soxRS; perR and ohrR, is employed to cope with oxidative stress induced by respiration or environmental assaults. oxyR, encompasses the gene encoding OxyR and some other genes and operons regulated by it, has captured the highest attention among these regulons. To date, members of oxyR regulon have been confirmed to participate in many physiological processes including antioxidant defense, repression of spontaneous mutagenesis, virulence, iron metabolism and out membrane protein phase-variation.