The N-terminal domain of Aliivibrio fischeri LuxR is a target of the GroEL chaperonin.

Here we show that the C-terminal domain of LuxR activates the transcription of Aliivibrio fischeri luxICDABEG in Escherichia coli SKB178 gro(+) and E. coli OFB1111 groEL673 strains to the same level. Using affinity chromatography, we showed that GroEL binds to the N-terminal domain of LuxR, pointing to a GroEL/GroES requirement for the folding of the N-terminal domain of LuxR.