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Related Experiment Videos

The nucleoprotein is required for efficient coronavirus genome replication.

Fernando Almazán1, Carmen Galán, Luis Enjuanes

  • 1Department of Molecular and Cell Biology, Centro Nacional de Biotecnología, CSIC, Campus Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain.

Journal of Virology
|October 28, 2004
PubMed
Summary

Researchers created transmissible gastroenteritis coronavirus (TGEV) replicons using bacterial artificial chromosomes. These TGEV replicons efficiently expressed foreign proteins in human cells with minimal negative effects.

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Area of Science:

  • Virology
  • Molecular Biology
  • Biotechnology

Background:

  • Transmissible gastroenteritis coronavirus (TGEV) is a significant pathogen.
  • Developing efficient viral replication systems is crucial for biotechnology and research.
  • Bacterial artificial chromosomes (BACs) offer a stable platform for constructing viral genomes.

Purpose of the Study:

  • To construct TGEV-derived replicons using BAC technology.
  • To assess the efficiency and functionality of these TGEV replicons.
  • To evaluate the expression of heterologous proteins using the TGEV replicon system.

Main Methods:

  • Sequential deletion of nonessential TGEV genes from a full-length cDNA clone.
  • Insertion of modified TGEV cDNA into a BAC vector.

Related Experiment Videos

  • Functional analysis of TGEV replicons in various cell lines, including human 293T cells.
  • Assessment of nucleoprotein's role in replicon activity.

    • Main Results:

    • Successfully constructed functional TGEV replicons on BACs.
    • Replicon activity was dependent on the presence of the nucleoprotein (cis or trans).
    • TGEV replicons demonstrated functionality in multiple cell lines, including human 293T cells.
    • High-level expression of heterologous proteins was achieved with minimal cytopathic effect in 293T cells.

    Conclusions:

    • TGEV-derived replicons can be efficiently constructed and propagated using BACs.
    • The TGEV replicon system is a viable tool for expressing heterologous proteins, particularly in human cell lines.
    • This system offers a promising platform for biotechnological applications and further virological studies.