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Related Concept Videos

Retroviruses02:33

Retroviruses

Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
Retrovirus Life Cycles01:10

Retrovirus Life Cycles

Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

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...
Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...

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Updated: May 8, 2026

Arbovirus Infections As Screening Tools for the Identification of Viral Immunomodulators and Host Antiviral Factors
06:02

Arbovirus Infections As Screening Tools for the Identification of Viral Immunomodulators and Host Antiviral Factors

Published on: September 13, 2018

Viroporins customize host cells for efficient viral propagation.

Kristina M Giorda1, Daniel N Hebert

  • 1Program in Molecular and Cellular Biology, Department of Biochemistry and Molecular Biology, University of Massachusetts , Amherst, Massachusetts.

DNA and Cell Biology
|August 16, 2013
PubMed
Summary

Viroporins are viral proteins that alter host cell membranes to aid virus replication and spread. This study explores how these proteins modify the cellular environment to advance the viral life cycle.

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Last Updated: May 8, 2026

Arbovirus Infections As Screening Tools for the Identification of Viral Immunomodulators and Host Antiviral Factors
06:02

Arbovirus Infections As Screening Tools for the Identification of Viral Immunomodulators and Host Antiviral Factors

Published on: September 13, 2018

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MicroRNA-based Regulation of Picornavirus Tropism
09:05

MicroRNA-based Regulation of Picornavirus Tropism

Published on: February 6, 2017

Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Viruses are obligate intracellular parasites that rely on host cell machinery for propagation.
  • Viroporins, a class of viral proteins, are crucial for viral proliferation by modifying host cell membranes.
  • Understanding viroporin function is key to comprehending viral life cycles.

Purpose of the Study:

  • To discuss the ability of viroporins to modify the cellular environment.
  • To emphasize the role of viroporins in the stepwise progression of the viral life cycle.

Main Methods:

  • Review of molecular and cell biological approaches.
  • Analysis of existing literature on viroporin function.

Main Results:

  • Viroporins transform the cellular environment to facilitate viral entry, replication, packaging, and release.
  • Modification of host membrane integrity by viroporins stimulates viral infection maturation.
  • Viroporins are critical for efficient virus production and dissemination.

Conclusions:

  • Viroporins play a multifaceted role in promoting viral proliferation by manipulating host cell membranes.
  • Further research into viroporins can reveal novel targets for antiviral therapies.