Conserved patterns of sequence diversification provide insight into the evolution of two-component systems in Enterobacteriaceae

Two-component regulatory systems (TCSs) are a major mechanism used by bacteria to sense and respond to their environments. Many of the same TCSs are used by biologically diverse organisms with different regulatory needs, suggesting that the functions of TCS must evolve. To explore this topic, we analysed the amino acid sequence divergence patterns of a large set of broadly conserved TCS across different branches of Enterobacteriaceae, a family of Gram-negative bacteria that includes biomedically important genera such as Salmonella, Escherichia, Klebsiella and others. Our analysis revealed trends in how TCS sequences change across different proteins or functional domains of the TCS, and across different lineages. Based on these trends, we identified individual TCS that exhibit atypical evolutionary patterns. We observed that the relative extent to which the sequence of a given TCS varies across different lineages is generally well conserved, unveiling a hierarchy of TCS sequence conservation with EnvZ/OmpR as the most conserved TCS. We provide evidence that, for the most divergent of the TCS analysed, PmrA/PmrB, different alleles were horizontally acquired by different branches of this family, and that different PmrA/PmrB sequence variants have highly divergent signal-sensing domains. Collectively, this study sheds light on how TCS evolve, and serves as a compendium for how the sequences of the TCS in this family have diverged over the course of evolution.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:10

Enthalten in:

Microbial genomics - 10(2024), 3 vom: 15. März

Sprache:

Englisch

Beteiligte Personen:

Barretto, Luke A F [VerfasserIn]
Van, Patryc-Khang T [VerfasserIn]
Fowler, Casey C [VerfasserIn]

Links:

Volltext

Themen:

Bacterial evolution
Enterobacteriaceae
EnvZ/OmpR
Gene regulatory networks
Histidine kinase
Journal Article
PmrA/PmrB
Response regulator
Two-component signal transduction
Two-component system

Anmerkungen:

Date Completed 20.03.2024

Date Revised 25.04.2024

published: Print

Citation Status MEDLINE

doi:

10.1099/mgen.0.001215

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM369917057