Comparative analysis of LytS/LytTR-type histidine kinase/response regulator systems in gamma-proteobacteria

Behr, Stefan; Brameyer, Sophie; Witting, Michael; Schmitt-Kopplin, Philipp and Jung, Kirsten (2017): Comparative analysis of LytS/LytTR-type histidine kinase/response regulator systems in gamma-proteobacteria.
In: PLOS One 12(8), e0182993

Abstract

Bacterial histidine kinase/response regulator systems operate at the interface between environmental cues and physiological states. Escherichia coli contains two LytS/LytTR-type histidine kinase/response regulator systems, BtsS/BtsR (formerly YehU/YehT) and YpdA/YpdB, which have been identified as pyruvate-responsive two-component systems. Since they exhibit remarkable similarity, we analyzed their phylogenetic distribution within the gamma-proteobacteria, and experimentally characterized them in a set of representative species. We found that BtsS/BtsR is the predominant LytS/LytTR-type two-component system among gamma-proteobacteria, whereas YpdA/YpdB primarily appears in a supplementary role. Based on our observations in E. coli, we used the highly conserved DNA-binding motifs to test the in vivo functionality of both systems in various genera, including Salmonella, Enterobacter, Citrobacter, Xenorhabdus, Yersinia, Aeromonas and Vibrio. The results suggest that, in all cases tested, BtsS/BtsR and YpdA/YpdB respond to different levels of pyruvate in the environment.

• Item Type: Journal article
• Research Centers: Center for Integrated Protein Science Munich (CIPSM)
• Subjects: 500 Science > 540 Chemistry
• ISSN: 1932-6203
• Language: English