2.4.2.53	additional information	pmrF expression is independent of polymyxin resistance proteins PmrA-PmrB in Yersinia pseudotuberculosis, with the response regulator PhoP interacting directly with the pmrF operon promoter region	709838	
2.4.2.53	up	low Mg2+/Ca2+ concentration of 1 mM and a pH decrease from 8 to 6 both induce polymyxin resistance. Transcription of the pmrF operon in Yersinia pseudotuberculosis increases accordingly, by a factor of 7 and 2.5 for the Mg2+/Ca2+ ion starvation and acidic pH conditions, respectively	709838