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Viral Recombination00:57

Viral Recombination

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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Mutations in Microorganisms01:18

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Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
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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...
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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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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...
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Updated: Jan 18, 2026

Preparation of rAAV9 to Overexpress or Knockdown Genes in Mouse Hearts
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From Viruses to Genes to Cells.

Peter K Vogt1

  • 1Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California 92037, USA;

Annual Review of Virology
|October 1, 2019
PubMed
Summary

This research explores retrovirology, viral replication, and genetics, later applying findings to human cancer research. The study highlights a career journey from early experiments to significant contributions in tumor virology and cancer research.

Area of Science:

  • Molecular Biology
  • Virology
  • Oncology

Background:

  • The researcher's journey began with a passion for biology and experimentation, leading to early involvement in retrovirology during its nascent stages of experimental analysis.
  • Initial research focused on fundamental aspects of viral replication, genetics, and the study of viral oncogenes.

Discussion:

  • Over time, the researcher transitioned to applying expertise gained in tumor virology to the complex field of human cancer.
  • Personal life experiences, including migration and tragedy, shaped the researcher's path but ultimately led to a stable career in scientific inquiry.

Key Insights:

  • The study underscores the importance of serendipity and passion in scientific discovery.
  • A career trajectory from basic viral research to applied cancer research demonstrates the interconnectedness of biological disciplines.
Keywords:
avian leukemiaavian sarcomaoncogenesretrovirusesviral genetics

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Outlook:

  • Continued research in cancer is planned, leveraging a deep understanding of virology and tumor biology.
  • The narrative emphasizes the potential for significant scientific contributions stemming from a dedicated and evolving research focus.