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Related Experiment Videos

Capsid coding sequence is required for efficient replication of human rhinovirus 14 RNA

K L McKnight1, S M Lemon

  • 1Department of Microbiology and Immunology, University of North Carolina at Chapel Hill 27599-7030, USA.

Journal of Virology
|March 1, 1996
PubMed
Summary

The 3' P1 capsid-coding sequence of human rhinovirus 14 (HRV-14) is essential for viral RNA replication. This previously unrecognized cis-active element is crucial for efficient picornavirus genome replication.

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Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Picornavirus RNA replication mechanisms are not fully understood.
  • Current models do not implicate capsid protein-coding sequences in replication.

Purpose of the Study:

  • To identify specific P1 (capsid protein-coding) sequences required for HRV-14 RNA replication.
  • To investigate the cis-active role of P1 sequences in viral genome replication.

Main Methods:

  • Constructed HRV-14 mutants with deletions in the P1 region.
  • Assessed replication efficiency of engineered RNA replicons in transfected cells.
  • Utilized reporter genes (beta-galactosidase, luciferase) to track replication and expression.

Main Results:

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  • Replicons with deletions in the 5' P1 region replicated efficiently.
  • Replicons with deletions in the 3' P1 region failed to replicate.
  • Reintroducing the 3' P1 sequence restored replication and reporter gene expression.

Conclusions:

  • A 3'-distal P1 capsid-coding sequence possesses a previously unrecognized cis-active function essential for HRV-14 RNA replication.
  • This finding challenges existing models of picornavirus replication and highlights a novel role for capsid-coding regions.