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Related Concept Videos

Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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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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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
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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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Interplay between host non-coding RNAs and influenza viruses.

Gayan Bamunuarachchi1,2,3, Samuel Pushparaj1,2,3, Lin Liu1,2

  • 1Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, Oklahoma, USA.

RNA Biology
|January 6, 2021
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Host noncoding RNAs, like microRNAs and long noncoding RNAs, play a role in regulating influenza virus infection. Understanding these interactions can reveal new therapeutic targets for influenza.

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Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Influenza virus poses a significant public health threat due to seasonal epidemics and pandemics.
  • Current vaccines and antiviral drugs have limitations, necessitating novel therapeutic strategies.
  • While host-pathogen protein interactions are studied, host noncoding RNA roles in influenza are less understood.

Purpose of the Study:

  • To review host noncoding RNA profiles during influenza virus infection.
  • To summarize the regulatory roles of host noncoding RNAs in influenza virus infection.
  • To briefly discuss viral non-coding RNAs in the context of influenza.

Main Methods:

  • Literature review of studies on host noncoding RNAs and influenza virus.
  • Analysis of host noncoding RNA expression profiles during infection.
  • Examination of regulatory mechanisms involving noncoding RNAs and viral replication.

Main Results:

  • Host noncoding RNAs, including microRNAs and long noncoding RNAs, are differentially expressed during influenza virus infection.
  • These noncoding RNAs can modulate viral replication and host immune responses.
  • Influenza viruses may also encode their own non-coding RNAs that influence infection.

Conclusions:

  • Host noncoding RNAs are critical regulators of influenza virus infection.
  • Targeting host noncoding RNA-virus interactions offers potential therapeutic avenues.
  • Further research into these molecular mechanisms is essential for developing new anti-influenza therapies.