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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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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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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,...
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Transcriptional Regulation: Riboswitches01:23

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Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...
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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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Host Non-Coding RNA Regulates Influenza A Virus Replication.

Yuejiao Liao1,2, Shouqing Guo1,2, Geng Liu1,2

  • 1Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China.

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Summary
This summary is machine-generated.

Host non-coding RNAs regulate influenza A virus (IAV) replication by targeting viral proteins and influencing innate immune pathways. This research maps the regulatory network for potential antiviral drug targets.

Keywords:
IAVantiviral innate immune responsecircRNAinterferonlncRNAmiRNA

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Area of Science:

  • Virology
  • Molecular Biology
  • Immunology

Background:

  • Influenza A virus (IAV) outbreaks pose a significant global health threat annually.
  • Host non-coding RNAs are crucial regulators of host-virus interactions during IAV infection.

Purpose of the Study:

  • To comprehensively analyze the regulatory roles of host non-coding RNAs in IAV replication.
  • To map the regulatory network of host non-coding RNAs in the innate immune response to IAV.

Main Methods:

  • Analysis of research progress on host non-coding RNAs and IAV replication.
  • Identification of host non-coding RNAs targeting specific IAV proteins (PB1, PB2) and genes (Nonstructural protein 1).
  • Investigation of host non-coding RNA involvement in intracellular viral response signaling pathways.

Main Results:

  • Numerous host non-coding RNAs directly target IAV's PB1 and PB2 proteins.
  • Host non-coding RNAs regulate IAV replication by affecting Nonstructural protein 1 and other key genes.
  • Host non-coding RNAs indirectly modulate key innate immune pathways like RIG-I, TLR, and JAK-STAT signaling.

Conclusions:

  • Host non-coding RNAs play a multifaceted role in regulating IAV replication and innate immunity.
  • Understanding these regulatory networks offers insights into virus-host interactions.
  • This research identifies potential targets for novel antiviral drug development.