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Related Concept Videos

Bacterial RNA Polymerase00:43

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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.
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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 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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Updated: Nov 22, 2025

Use of Alu Element Containing Minigenes to Analyze Circular RNAs
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Circular RNA: an important player with multiple facets to regulate its parental gene expression.

Tong Shao1,2, Yan-Hong Pan1,2, Xing-Dong Xiong1,2

  • 1Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Institute of Aging Research, Guangdong Medical University, Dongguan 523808, P.R. China.

Molecular Therapy. Nucleic Acids
|January 11, 2021
PubMed
Summary

Circular RNAs (circRNAs) are novel RNA molecules with crucial roles in gene regulation and disease. This review explores circRNA biogenesis and their mechanisms for controlling parental gene expression, highlighting their biological significance.

Keywords:
circular RNAgene expressionparental generegulatory mechanism

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Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • Circular RNAs (circRNAs) are a novel class of endogenous RNA molecules characterized by unique covalently closed-loop structures.
  • These molecules exhibit significant diversity, stability, evolutionary conservation, and cell/tissue-specific expression, indicating crucial biological functions.
  • circRNAs are increasingly recognized as key regulators in physiological development and disease pathogenesis.

Purpose of the Study:

  • To review the biogenesis of circular RNAs (circRNAs).
  • To elucidate the molecular mechanisms by which circRNAs regulate their parental gene expression.
  • To discuss the biological significance of circRNA-mediated gene regulation.

Main Methods:

  • Literature review of studies on circRNA biogenesis.
  • Analysis of research detailing circRNA regulatory mechanisms, including miRNA sponging, mRNA trapping, and modulation of transcription, splicing, translation, and post-translational modification.
  • Synthesis of findings on the biological roles and clinical implications of circRNAs.

Main Results:

  • circRNAs regulate parental gene expression through multiple mechanisms, including acting as miRNA sponges, mRNA traps, and influencing transcriptional and post-transcriptional processes.
  • These regulatory functions are critical for normal development and the progression of various diseases.
  • Understanding these mechanisms provides insights into the diverse biological roles of circRNAs.

Conclusions:

  • circRNAs are versatile regulators of gene expression with significant biological functions.
  • Elucidating circRNA biogenesis and regulatory mechanisms deepens our understanding of their roles in health and disease.
  • circRNAs hold potential for novel clinical applications in diagnostics and therapeutics.