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Related Experiment Videos

Vaccinia virus host range genes.

M E Perkus1, S J Goebel, S W Davis

  • 1Virogenetics Corporation, Troy, New York 12180-8349.

Virology
|November 1, 1990
PubMed
Summary
This summary is machine-generated.

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Two vaccinia virus host range genes, C7L and K1L, are essential for replication in human cells. Cowpox virus CP77kDa can substitute for these genes, enabling vaccinia virus replication in human and pig cells.

Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Vaccinia virus host range is determined by specific viral genes.
  • Previous studies identified K1L as a key host range gene.
  • The function of other potential host range genes remained unclear.

Purpose of the Study:

  • To identify and characterize novel vaccinia virus host range genes.
  • To determine the functional equivalence of identified genes in viral replication.
  • To investigate the role of host range genes in cell-specific viral propagation.

Main Methods:

  • Gene deletion and functional complementation assays in vaccinia virus.
  • Comparative analysis of viral replication in various cell lines (human, Chinese hamster ovary, pig kidney, rabbit kidney).

Related Experiment Videos

  • Identification and characterization of open reading frames (ORFs) encoding polypeptides.

    • Main Results:

    • The C7L gene, encoding an 18-kDa polypeptide, is functionally equivalent to the K1L host range gene.
    • Both C7L and K1L are necessary and sufficient for vaccinia virus replication in human cells.
    • Deletion of both C7L and K1L renders vaccinia virus unable to replicate in human cells.
    • Cowpox virus 77-kDa polypeptide (CP77kDa) can substitute for C7L and K1L, enabling vaccinia virus replication in human cells.
    • C7L, K1L, and CP77kDa show functional equivalence for vaccinia replication in pig kidney cells, but not rabbit kidney cells.

    Conclusions:

    • C7L and K1L are critical vaccinia virus host range genes for human cell replication.
    • CP77kDa exhibits cross-species functional conservation as a host range determinant.
    • Host range genes display differential activity across various mammalian cell types, highlighting species-specific viral tropism.