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Related Concept Videos

Transcriptional Regulation: Riboswitches01:23

Transcriptional Regulation: Riboswitches

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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

Types of RNA

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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.
RNA...
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Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

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Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
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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.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
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Ribozymes02:47

Ribozymes

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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.
Ribozymes can...
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Ribozymes02:47

Ribozymes

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Related Experiment Video

Updated: Apr 30, 2026

Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5&#8242;-Phosphate
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Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5′-Phosphate

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Natural riboflavin analogs.

Danielle Biscaro Pedrolli1, Frank Jankowitsch, Julia Schwarz

  • 1Institute for Technical Microbiology, Mannheim University of Applied Sciences, Paul-Wittsack-Str. 10, 68163, Mannheim, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|April 26, 2014
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Summary

Riboflavin analogs show promise for new anti-infectives due to multiple cellular targets, potentially reducing resistance. Roseoflavin is a natural example, highlighting the potential of undiscovered flavin analogs.

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Area of Science:

  • Microbiology
  • Biochemistry
  • Drug Discovery

Background:

  • Riboflavin analogs are potential scaffolds for novel anti-infectives.
  • Riboflavin's role as a precursor to flavin cofactors allows multiple cellular targets.
  • This multi-targeting characteristic may significantly reduce antimicrobial resistance development.

Purpose of the Study:

  • To explore the potential of riboflavin analogs as anti-infective agents.
  • To highlight the significance of roseoflavin as a natural antibiotic.
  • To investigate the broader prevalence and potential applications of flavin analogs.

Main Methods:

  • Literature review on riboflavin analogs and their biological activity.
  • Analysis of roseoflavin's mechanism of action against flavoenzymes and FMN riboswitches.
  • Identification of new roseoflavin-producing microorganisms.

Main Results:

  • Roseoflavin, produced by Streptomyces davawensis, exhibits antibiotic properties.
  • Roseoflavin interferes with essential cellular processes by targeting flavoenzymes and FMN riboswitches.
  • Streptomyces cinnabarinus has been identified as another producer of roseoflavin.

Conclusions:

  • Riboflavin analogs possess significant potential for developing new antimicrobial drugs with reduced resistance.
  • The discovery of multiple roseoflavin producers suggests flavin analogs with antibiotic activity may be widespread.
  • Undiscovered flavin analogs could offer novel tools for cellular chemistry and enzyme catalysis.