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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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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
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RNA Interference01:23

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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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RNA Structure01:23

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The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
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RNA Stability01:53

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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Functional Interplay between RNA Viruses and Non-Coding RNA in Mammals.

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Virus-host RNA interactions are crucial for understanding viral infections and developing new RNA therapeutics. This review highlights known and potential virus-host RNA interactions, emphasizing their role in the viral lifecycle and host defense.

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Area of Science:

  • Virology
  • Molecular Biology
  • Immunology

Background:

  • Protein-level virus-host interactions are well-studied, but RNA interactions are less understood.
  • Emerging sequencing technologies reveal the significance of RNA-protein and RNA-RNA interactions in viral infections.
  • Mammalian cells utilize regulatory non-coding RNAs, some of which are exploited by viruses.

Purpose of the Study:

  • To review direct and indirect RNA interactions between viruses and host non-coding RNAs.
  • To discuss viral non-coding RNAs that modulate host immunological and metabolic pathways.
  • To highlight the potential of virus-host RNA interactions as antiviral targets.

Main Methods:

  • Literature review of direct and indirect RNA interactions.
  • Analysis of viral non-coding RNAs impacting host pathways.
  • Exploration of RNA-based antiviral therapeutic strategies.

Main Results:

  • RNA interactions play critical roles in the virus-host 'arms race'.
  • Viruses utilize host non-coding RNAs, and viral non-coding RNAs can manipulate host functions.
  • Many virus-host RNA interactions likely remain undiscovered.

Conclusions:

  • Virus-host RNA interactions are fundamental to viral replication and pathogenesis.
  • Understanding these interactions is key for advancing RNA therapeutics.
  • Further research is needed to uncover the full scope of virus-host RNA interactions.