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Types of RNA

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

Types of RNA

Types of RNA

Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...

Translational Regulation

Translational Regulation

Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...

Bacterial RNA Polymerase

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...

Bacterial RNA Polymerase

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...

Transcriptional Regulation: Riboswitches

Transcriptional Regulation: Riboswitches

Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...

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Updated: Jun 10, 2026

A Non-Coding Small RNA MicC Contributes to Virulence in Outer Membrane Proteins in Salmonella Enteritidis

A Non-Coding Small RNA MicC Contributes to Virulence in Outer Membrane Proteins in Salmonella Enteritidis

Published on: January 27, 2021

Regulatory RNA in bacterial pathogens.

Kai Papenfort¹, Jörg Vogel

¹RNA Biology Group, Max Planck Institute for Infection Biology, Charitéplatz 1, D-10117 Berlin, Germany.

Cell Host & Microbe

|July 20, 2010

Summary

Regulatory RNAs are crucial for bacterial gene control, impacting host interactions and disease. This review explores how these RNA molecules switch bacteria between harmless and harmful states, influencing virulence.

Area of Science:

Microbiology and Molecular Biology
Bacterial Pathogenesis
Gene Regulation

Background:

Bacteria are diverse infectious agents causing significant diseases.
Gene expression control is vital for disease prevention and treatment.
The role of regulatory RNAs in bacterial gene expression has been historically underestimated.

Purpose of the Study:

To review the diverse regulatory RNA mechanisms in bacterial pathogens.
To highlight the interplay between riboregulation and virulence factor expression.
To underscore the importance of regulatory RNAs in host-microbe interactions and pathogenicity.

Main Methods:

Literature review of recent findings on bacterial regulatory RNAs.
Analysis of studies focusing on host-microbe interactions.

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A Non-Coding Small RNA MicC Contributes to Virulence in Outer Membrane Proteins in Salmonella Enteritidis

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

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Examination of the role of regulatory RNAs in switching bacterial lifestyles.

Main Results:

Regulatory RNAs play multifaceted roles in bacterial gene expression.
These RNA regulators are key in facilitating host-microbe interactions.
Regulatory RNAs act as critical switches between saprophytic and pathogenic bacterial behaviors.

Conclusions:

Regulatory RNAs are essential components of bacterial virulence.
Understanding riboregulation is crucial for developing novel therapeutic strategies against bacterial infections.
The dynamic interplay between RNA regulation and virulence factors offers new targets for intervention.