What question did this study set out to answer?

This research aims to investigate additional regulatory inputs in the DNA damage response system of mycobacteria, beyond the known LexA-mediated pathway.

July 27, 2026BMC MicrobiologyOpen Access

A LexA-independent redox-based transcriptional regulation to DNA damage response system in mycobacteria

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Authors

SLSige Li ZWZ W Wu WZWei Zhou

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Overview

Randomized trial uncovers a new pathway for DNA damage response in mycobacteria, suggesting alternative regulatory mechanisms.

Key Points

This research aims to investigate additional regulatory inputs in the DNA damage response system of mycobacteria, beyond the known LexA-mediated pathway.
Performed a bacterial one-hybrid screen to identify transcriptional regulators activating DDR gene expression.
Conducted promoter truncation analysis to examine regulatory mechanisms distinct from the LexA-binding motif.
Utilized RNA-seq analysis to evaluate gene expression changes upon overexpression of identified regulators.
Identified Rv2282c, Rv1985c, and Rv1990c as regulators activating DDR gene expression.
Observed consistent repression of the tpx gene, which is linked to oxidative stress, by these regulators.
Complementation of Tpx improved cell growth and reduced reactive oxygen species accumulation in strains with overexpressed regulators.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a6700bd40bca442e0d4ac37 https://doi.org/10.1186/s12866-026-05449-y

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July 27, 2026BMC MicrobiologyOpen Access

A LexA-independent redox-based transcriptional regulation to DNA damage response system in mycobacteria

View Full Paper

Ask AI

Bookmark

Authors

SLSige Li ZWZ W Wu WZWei Zhou

Discussion

Member takes

Overview

Randomized trial uncovers a new pathway for DNA damage response in mycobacteria, suggesting alternative regulatory mechanisms.

Key Points

This research aims to investigate additional regulatory inputs in the DNA damage response system of mycobacteria, beyond the known LexA-mediated pathway.
Performed a bacterial one-hybrid screen to identify transcriptional regulators activating DDR gene expression.
Conducted promoter truncation analysis to examine regulatory mechanisms distinct from the LexA-binding motif.
Utilized RNA-seq analysis to evaluate gene expression changes upon overexpression of identified regulators.
Identified Rv2282c, Rv1985c, and Rv1990c as regulators activating DDR gene expression.
Observed consistent repression of the tpx gene, which is linked to oxidative stress, by these regulators.
Complementation of Tpx improved cell growth and reduced reactive oxygen species accumulation in strains with overexpressed regulators.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a6700bd40bca442e0d4ac37 https://doi.org/10.1186/s12866-026-05449-y

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