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Related Concept Videos

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...
Translational Regulation01:29

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,...
Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
RNA Polymerase II Accessory Proteins02:36

RNA Polymerase II Accessory Proteins

Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...

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Related Experiment Video

Updated: Jul 13, 2026

MS2-Affinity Purification Coupled with RNA Sequencing in Gram-Positive Bacteria
08:34

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

Published on: February 23, 2021

Proteins that interact with bacterial small RNA regulators.

Christophe Pichon1, Brice Felden

  • 1INSERM U835, Upres JE2311, Biochimie Pharmaceutique, Université de Rennes 1, Rennes, France.

FEMS Microbiology Reviews
|July 28, 2007
PubMed
Summary

Small regulatory RNAs (sRNAs) interact with proteins to control gene expression and cellular processes in prokaryotes. These sRNA-protein complexes are crucial for DNA, RNA, and protein metabolism and quality control.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Small regulatory RNAs (sRNAs) are key players in gene regulation across diverse organisms.
  • sRNAs function by interacting with messenger RNA (mRNA) targets or directly modulating protein activities.
  • Understanding the protein partners of sRNAs is essential for deciphering their regulatory roles.

Purpose of the Study:

  • To review the known proteins that interact with small regulatory RNAs (sRNAs).
  • To discuss the physiological implications of sRNA-protein complexes in prokaryotes.
  • To highlight the roles of these complexes in fundamental cellular processes.

Main Methods:

  • Literature review of studies on sRNA-protein interactions.
  • Analysis of known functions of sRNA-protein complexes.
  • Compilation of data on the impact of these complexes on prokaryotic metabolism and quality control.

Main Results:

  • Proteins interacting with sRNAs can exhibit catalytic activity, alter sRNA conformation, or be sequestered by sRNAs.
  • sRNA-protein complexes are involved in DNA replication, RNA processing, and protein synthesis.
  • These complexes play significant roles in maintaining RNA and protein homeostasis (quality control).

Conclusions:

  • sRNA-protein interactions are fundamental to prokaryotic gene regulation and cellular function.
  • These complexes are integral to managing DNA, RNA, and protein metabolism.
  • sRNA-protein complexes are critical for prokaryotic RNA and protein quality control mechanisms.