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Related Concept Videos

Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

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Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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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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Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
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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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Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
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eIF4E as a control target for viruses.

Hilda Montero1, Rebeca García-Román2, Silvia I Mora3

  • 1Public Health Institute, University of Veracruz, Veracruz 91190, Mexico. hmontero@uv.mx.

Viruses
|February 19, 2015
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Summary
This summary is machine-generated.

Viruses hijack the translation initiation factor eIF4E and its regulatory proteins to control host cell functions. This manipulation aids viral replication, cell proliferation, and reactivation, facilitating virus spread.

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Area of Science:

  • Molecular Biology
  • Virology
  • Cellular Biology

Background:

  • Translation is a fundamental cellular process regulated by proteins like eukaryotic initiation factor 4E (eIF4E).
  • Viruses depend on host cell machinery, including translation factors, for their replication.
  • eIF4E is a key regulator of mRNA translation and a target for viral manipulation.

Purpose of the Study:

  • To review the diverse mechanisms by which viruses exploit eIF4E and its regulatory proteins.
  • To highlight the impact of viral manipulation of eIF4E on viral replication and host cell biology.
  • To understand how viruses utilize eIF4E for proliferation and reactivation.

Main Methods:

  • Literature review of studies investigating viral interactions with eIF4E.
  • Analysis of viral strategies for manipulating eIF4E-dependent translation.
  • Examination of the consequences of eIF4E dysregulation on viral infection.

Main Results:

  • Viruses employ various strategies to manipulate eIF4E activity and availability.
  • eIF4E manipulation affects viral protein synthesis, host cell proliferation, and viral reactivation.
  • These viral mechanisms are diverse and tailored to specific virus-host interactions.

Conclusions:

  • Viruses strategically utilize the host's eIF4E and associated proteins to their advantage.
  • Manipulation of eIF4E is crucial for efficient viral spread and replication.
  • Targeting eIF4E presents a potential avenue for antiviral strategies.