G. Jovanovic et al., AUTOGENOUS CONTROL OF PSPF, A CONSTITUTIVELY ACTIVE ENHANCER-BINDING PROTEIN OF ESCHERICHIA-COLI, Journal of bacteriology, 179(16), 1997, pp. 5232-5237
Escherichia coli sigma(54)-dependent phage shock protein operon (pspA
to -E) transcription is under the control of PspF, a constitutively ac
tive activator, sigma(70)-dependent transcription of pspF is under aut
ogenous control by wild-type PspF but not by a DNA-binding mutant, Psp
F Delta HTH. Negative autoregulation of PspF is continual and not affe
cted by stimuli, like f1 pIV, that induce the pspA to -E operon. PspF
production is Independent of PspA (the negative regulator of the pspA
to -E operon) and of PspB and -C (positive regulators).