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Riboswitches

Riboswitches

Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...

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...

Ribosome Profiling

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...

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.
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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,...

Ribozymes

Ribozymes

The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
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Related Experiment Video

Updated: May 29, 2026

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

Prospects for riboswitch discovery and analysis.

Ronald R Breaker¹

¹Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06520-8103, USA. ronald.breaker@yale.edu

|September 20, 2011

Summary

Bacterial genomes contain numerous metabolite-binding riboswitches that regulate metabolic pathways and cell physiology. These RNA elements are complex, rivaling protein functions and offering exciting research prospects.

Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

Riboswitches are RNA molecules found in bacterial noncoding genomes.
They bind to metabolites and regulate gene expression.
Recent discoveries reveal increasing diversity and complexity in riboswitch classes.

Purpose of the Study:

To review the expanding landscape of metabolite-binding riboswitches in bacteria.
To discuss their roles in metabolic regulation and cellular physiology.
To highlight current research prospects and unresolved questions in the field.

Main Methods:

Literature review of recent riboswitch discoveries.
Analysis of structural and functional data for various riboswitch classes.
Discussion of implications for RNA biology and gene regulation.

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RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing

RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing

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Last Updated: May 29, 2026

Nanomanipulation of Single RNA Molecules by Optical Tweezers

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MS2-Affinity Purification Coupled with RNA Sequencing in Gram-Positive Bacteria

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RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing

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Main Results:

A growing number of diverse riboswitch classes have been identified.
Riboswitches commonly regulate metabolic pathways and cellular functions in bacteria.
Some riboswitches exhibit sophisticated structures and functions comparable to proteins.

Conclusions:

Riboswitches are crucial RNA regulators in bacteria with significant biochemical capabilities.
Further research is needed to fully understand their complexity and diverse roles.
The study of riboswitches offers promising avenues for future scientific exploration.