The transcriptional regulators DntR, NagR and NtdR have a high sequence identity and belong to the large family of LysR type transcriptional regulators (LTTRs). These three regulators are all involved in regulation of genes identified in pathways for degradation of aromatic compounds. They activate the transcription of these genes in the presence of an inducer, but the inducer specificity profiles are different.
Lönneborg, R., & Brzezinski, P. (2011). Factors that influence the response of the LysR type transcriptional regulators to aromatic compounds. BMC Biochemistry, 12(1). https://doi.org/10.1186/1471-2091-12-49