Sensitive Bacterial V Sensors Revealed the Excitability of Bacterial V and Its Role in Antibiotic Tolerance

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2023 Jan 9

PMID 36623202

Authors

Xin Jin

Xiaowei Zhang

Xuejing Ding

Tian Tian

Chao-Kai Tseng

Xinwei Luo

Xiao Chen

Chien-Jung Lo

Mark C Leake

Fan Bai

Affiliations

Soon will be listed here.

Abstract

As an important free energy source, the membrane voltage (V) regulates many essential physiological processes in bacteria. However, in comparison with eukaryotic cells, knowledge of bacterial electrophysiology is very limited. Here, we developed a set of novel genetically encoded bacterial V sensors which allow single-cell recording of bacterial V dynamics in live cells with high temporal resolution. Using these new sensors, we reveal the electrically "excitable" and "resting" states of bacterial cells dependent on their metabolic status. In the electrically excitable state, frequent hyperpolarization spikes in bacterial V are observed, which are regulated by Na/K ratio of the medium and facilitate increased antibiotic tolerance. In the electrically resting state, bacterial V displays significant cell-to-cell heterogeneity and is linked to the cell fate after antibiotic treatment. Our findings demonstrate the potential of our newly developed voltage sensors to reveal the underpinning connections between bacterial V and antibiotic tolerance.

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