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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...

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...

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...

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...

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Related Experiment Video

Updated: May 22, 2026

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

Molecular recognition and function of riboswitches.

Alexander Serganov¹, Dinshaw J Patel

¹Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, 550 First Ave., MSB-393, New York, NY 10016, USA.

Current Opinion in Structural Biology

|May 15, 2012

Summary

Riboswitches are regulatory mRNA elements that control gene expression based on metabolite levels. Recent structural and folding studies reveal how these RNA sensors achieve high selectivity and offer potential for genetic circuit intervention.

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Published on: January 30, 2019

Area of Science:

Molecular Biology
RNA Biology
Biochemistry

Background:

Riboswitches are regulatory mRNA elements that control gene expression in response to cellular metabolite concentrations.
Their high selectivity for specific metabolites is achieved through the intricate tertiary structures of their sensor domains.
Understanding riboswitch structure and folding is crucial for deciphering gene expression regulation.

Purpose of the Study:

To explore novel structures of single-ligand and cooperative double-ligand riboswitch sensors.
To deepen the understanding of architectural and molecular recognition principles in riboswitches.
To investigate the formation of ligand-competent conformations and ligand discrimination mechanisms.

Main Methods:

Structural biology techniques to determine novel riboswitch architectures.
RNA folding studies to analyze conformational dynamics.
Biochemical assays to probe ligand binding and discrimination.

Main Results:

Discovery of new single-ligand and cooperative double-ligand riboswitch sensor structures.
Elucidation of key folding pathways leading to ligand-competent states.
Detailed insights into the molecular mechanisms of metabolite recognition and discrimination.

Conclusions:

Recent structural and folding studies have significantly advanced our knowledge of riboswitch function.
This research provides a molecular basis for understanding riboswitch-mediated gene expression control.
The findings offer potential for engineering interventions in riboswitch-controlled genetic circuits.