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Super-Resolution Imaging of Bacterial Secreted Proteins Using Genetic Code Expansion
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Extra cytoplasmic function σ factor activation.

Theresa D Ho1, Craig D Ellermeier

  • 1Department of Microbiology, University of Iowa, Iowa City, IA 52242, United States.

Current Opinion in Microbiology
|March 3, 2012
PubMed
Summary
This summary is machine-generated.

Bacteria sense and respond to cell envelope damage using alternative sigma factors. This review examines the distinct activation mechanisms of two key extracytoplasmic function sigma factors, σ(E) in E. coli and σ(W) in B. subtilis.

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A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
07:10

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues

Published on: February 19, 2019

Area of Science:

  • Microbiology
  • Molecular Biology
  • Bacterial Physiology

Background:

  • The bacterial cell envelope is crucial for survival and a primary target for antibiotics and host immunity.
  • Bacteria possess sophisticated mechanisms to detect and respond to cell envelope damage.
  • Alternative sigma factors, particularly extracytoplasmic function (ECF) sigma factors, play a vital role in orchestrating cellular responses to stress.

Purpose of the Study:

  • To review and compare the activation pathways of two representative ECF sigma factors.
  • To elucidate the specific proteins and events involved in sensing and responding to cell envelope stress.
  • To highlight the differences in ECF sigma factor activation mechanisms between Gram-negative and Gram-positive bacteria.

Main Methods:

  • Literature review of existing research on ECF sigma factor activation.
  • Comparative analysis of well-characterized ECF sigma factors, σ(E) from E. coli and σ(W) from B. subtilis.
  • Examination of protein-protein interactions and signaling cascades involved in stress response.

Main Results:

  • ECF sigma factors are essential regulators of the bacterial cell envelope stress response.
  • Distinct sensing and activation mechanisms exist for ECF sigma factors in different bacterial species.
  • σ(E) in E. coli and σ(W) in B. subtilis represent distinct models for ECF sigma factor activation.

Conclusions:

  • Understanding ECF sigma factor activation is key to developing novel antimicrobial strategies.
  • The differential mechanisms highlight the evolutionary adaptations of bacteria to diverse environmental challenges.
  • Further research into these pathways could reveal new therapeutic targets for combating bacterial infections.