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Related Concept Videos

Riboswitches01:56

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: Riboswitches01:23

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 RNA01:23

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 RNA01:20

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 RNA01:20

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 RNA01:23

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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Nanomanipulation of Single RNA Molecules by Optical Tweezers
06:59

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

Design principles for riboswitch function.

Chase L Beisel1, Christina D Smolke

  • 1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, USA.

Plos Computational Biology
|April 22, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed quantitative frameworks to tune RNA riboswitches for controlling gene expression. Mathematical modeling and experiments revealed design principles for synthetic riboswitches, optimizing biological system regulation.

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Area of Science:

  • Synthetic Biology
  • Molecular Biology
  • Systems Biology

Background:

  • Controlling biological systems requires tunable regulatory components.
  • RNA, particularly riboswitches, offers rich regulatory capacity for synthetic biology applications.
  • Existing methods lack quantitative frameworks for optimizing riboswitch function.

Purpose of the Study:

  • To develop a quantitative framework for investigating and guiding riboswitch tuning.
  • To understand the relationship between riboswitch sequence, function, and performance.
  • To establish design principles for synthetic riboswitches.

Main Methods:

  • Combined mathematical modeling with experimental validation.
  • Analyzed the influence of rate constants (reversible vs. irreversible) on riboswitch performance.
  • Investigated the impact of system constraints, like ligand concentration limits, on tuning strategies.

Main Results:

  • Model predictions showed that the balance of rate constants is key to riboswitch performance.
  • System restrictions necessitate alternative strategies for effective riboswitch tuning.
  • Experimental data for natural and synthetic riboswitches supported the model's predictions.

Conclusions:

  • Developed general design principles for creating effective synthetic riboswitches.
  • Provided a foundation for understanding natural riboswitch tuning in biological systems.
  • Enabled more precise control over gene expression using RNA-based regulatory elements.