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Viruses with RNA Genomes01:29

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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
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lncRNA - Long Non-coding RNAs02:39

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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Types of RNA01:20

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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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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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Viral noncoding RNAs: more surprises.

Kazimierz T Tycowski1, Yang Eric Guo1, Nara Lee1

  • 1Department of Molecular Biophysics and Biochemistry, Howard Hughes Medical Institute, Boyer Center for Molecular Medicine, Yale University School of Medicine, New Haven, Connecticut 06536, USA.

Genes & Development
|March 21, 2015
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Summary
This summary is machine-generated.

Viruses produce noncoding RNAs (ncRNAs) that interact with proteins to regulate viral replication, persistence, and host immunity. This review explores the diverse functions and mechanisms of these crucial viral ncRNAs.

Keywords:
gene regulationlncRNAmiRNAribonucleoproteinsisRNAvirus

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Area of Science:

  • Molecular Biology
  • Virology
  • Genetics

Background:

  • Eukaryotic cells generate various noncoding RNAs (ncRNAs).
  • Viruses, including DNA and RNA viruses, also synthesize their own ncRNAs.
  • Viral ncRNAs, similar to host ncRNAs, bind proteins for stability and function.

Purpose of the Study:

  • To review the diverse functions of ncRNAs produced by animal viruses.
  • To discuss the biogenesis and mechanisms of action of viral ncRNAs.

Main Methods:

  • Literature review of scientific publications on viral ncRNAs.
  • Analysis of reported functions, biogenesis, and mechanisms of action.

Main Results:

  • Viral ncRNAs play roles in regulating viral replication and persistence.
  • These ncRNAs are involved in host immune evasion strategies.
  • Viral ncRNAs can contribute to cellular transformation.

Conclusions:

  • Viral ncRNAs are essential components of the viral life cycle.
  • Understanding viral ncRNA functions offers insights into viral pathogenesis and potential therapeutic targets.