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Related Experiment Videos

RNA is a structural element in retrovirus particles.

D Muriaux1, J Mirro, D Harvin

  • 1HIV Drug Resistance Program, National Cancer Institute-Frederick Cancer Research and Development Center, Frederick, MD 21702-1201, USA.

Proceedings of the National Academy of Sciences of the United States of America
|April 26, 2001
PubMed
Summary
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Retrovirus assembly uses cellular mRNA as a structural component when genomic RNA is absent. This finding reveals RNA

Area of Science:

  • Molecular Biology
  • Virology
  • Structural Biology

Background:

  • Retroviral Gag protein drives virus particle assembly.
  • Genomic RNA packaging is specific but not essential for in vivo assembly.
  • Nucleic acids enhance in vitro assembly by acting as scaffolding.

Purpose of the Study:

  • Investigate the role of RNA in retrovirus assembly in vivo.
  • Determine if RNA is a structural component of retroviral particles.

Main Methods:

  • Analysis of murine leukemia virus particles lacking genomic RNA.
  • Expression of Gag protein using a Semliki Forest virus vector.
  • RNase treatment of retroviral cores.

Main Results:

Related Experiment Videos

  • Particles lacking genomic RNA contained cellular mRNA.
  • Semliki Forest virus vector-driven mRNA was abundant and found in particles.
  • Retroviral cores were disrupted by RNase treatment.

Conclusions:

  • Cellular mRNA can substitute for genomic RNA in retrovirus assembly.
  • RNA acts as a structural element in retrovirus particles.
  • These findings highlight the essential structural role of RNA in retrovirus particle formation.