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Related Concept Videos

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...

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Reverse Genetics Mediated Recovery of Infectious Murine Norovirus
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Highs and Lows in Calicivirus Reverse Genetics.

Ángel L Álvarez1, Aroa Arboleya1, Fábio A Abade Dos Santos1,2

  • 1Instituto Universitario de Biotecnología de Asturias (IUBA), Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, 33006 Oviedo, Spain.

Viruses
|June 27, 2024
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Summary

Reverse genetics enables viral genome modification and progeny assessment. Establishing these systems for Caliciviridae remains challenging due to limited cell culture propagation, hindering routine application.

Keywords:
RNA viruscalicivirusinfectious clonereverse genetics

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Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Reverse genetics involves modifying viral genomes to study progeny and phenotypes.
  • Advances in recombinant DNA technology facilitate gene isolation, cloning, and mutagenesis.
  • Successful reverse genetics typically relies on rescuing infectious virus from transfected "infectious clones".

Purpose of the Study:

  • To review the challenges and successes in establishing reverse genetics systems for Caliciviridae.
  • To discuss the pitfalls and delays encountered in generating infectious calicivirus clones.

Main Methods:

  • Utilizing infectious clones containing full-length viral genomes.
  • Transfecting cell cultures with modified viral genomes.
  • Assessing the generation of infectious viral progeny and phenotypic changes.

Main Results:

  • Reverse genetics is straightforward for DNA viruses but challenging for RNA viruses.
  • Establishing reverse genetics for Caliciviridae is difficult due to poor cell culture propagation.
  • Despite early successes, reverse genetics methods for caliciviruses are not routine.

Conclusions:

  • Reverse genetics systems for Caliciviridae are not easily extrapolated to other family members.
  • Few reports detail successful reverse genetics systems for caliciviruses.
  • Overcoming challenges in cell culture adaptation is crucial for advancing calicivirus reverse genetics.