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Related Concept Videos

Riboswitches01:56

Riboswitches

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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.
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Transcriptional Regulation: Riboswitches01:23

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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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Types of RNA01:23

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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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Types of RNA01:20

Types of RNA

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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.
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Translational Regulation01:29

Translational Regulation

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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,...
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Ribosome Profiling02:24

Ribosome Profiling

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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.
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Boosting riboswitch efficiency by RNA amplification.

Masoumeh Emadpour1, Daniel Karcher1, Ralph Bock2

  • 1Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam-Golm, Germany.

Nucleic Acids Research
|April 1, 2015
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Summary
This summary is machine-generated.

Researchers developed an RNA amplification-enhanced riboswitch (RAmpER) to boost gene expression control. This system enables efficient, inducible gene expression in plant chloroplasts, even for toxic proteins.

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Area of Science:

  • Molecular Biology
  • Synthetic Biology
  • Plant Biotechnology

Background:

  • Riboswitches are RNA molecules that regulate gene expression in response to small molecule binding.
  • Natural riboswitches offer limited control over gene expression levels, hindering biotechnological applications.
  • Efficient inducible gene expression tools are lacking for higher plant chloroplasts.

Purpose of the Study:

  • To design and implement an RNA amplification-based system to enhance riboswitch efficiency.
  • To establish a novel inducible gene expression system in plant chloroplasts.
  • To demonstrate the utility of the enhanced system for producing toxic proteins.

Main Methods:

  • Development of an RNA amplification-based system integrated with riboswitches.
  • Implementation of the system in the chloroplast genome of higher plants.
  • Testing the system's efficacy using an HIV antigen expression model.

Main Results:

  • The RNA amplification-enhanced riboswitch (RAmpER) significantly improved riboswitch-mediated gene expression efficiency.
  • Successful inducible expression of an HIV antigen in plant chloroplasts was achieved without detrimental effects on plant growth.
  • The system demonstrated robust control over gene expression, allowing for controlled production of potentially toxic proteins.

Conclusions:

  • The RAmpER system provides a powerful new tool for inducible gene expression in plant chloroplasts.
  • This technology has broad implications for metabolic engineering and the production of valuable proteins in plants.
  • The ability to control expression of toxic proteins opens new avenues for synthetic biology applications in plants.