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Related Experiment Videos

Interferon-inducible Mx proteins in fish

J C Leong1, G D Trobridge, C H Kim

  • 1Department of Microbiology, Oregon State University, Corvallis, USA. leongj@orst.edu

Immunological Reviews
|January 23, 1999
PubMed
Summary

Mx proteins are crucial for antiviral defense. Rainbow trout Mx proteins share conserved domains with mammals, but their specific antiviral functions require further investigation.

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Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • Mx proteins are interferon-inducible, playing a key role in the innate antiviral immune response.
  • Mammalian Mx proteins exhibit variations in viral inhibition, cellular localization, and activity.
  • Mice lacking Mx genes show heightened susceptibility to influenza virus infections.

Purpose of the Study:

  • To clone and characterize three rainbow trout Mx proteins (RBTMx1, RBTMx2, RBTMx3).
  • To compare the sequence conservation of trout Mx proteins with avian and mammalian counterparts.
  • To investigate the cellular localization and potential antiviral functions of trout Mx proteins.

Main Methods:

  • Cloning of rainbow trout Mx protein cDNAs.
  • Sequence analysis and comparison with avian and mammalian Mx proteins.

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  • Immunohistochemical staining of transfected cells to determine protein localization.

    • Main Results:

    • Three rainbow trout Mx protein cDNAs were successfully cloned.
    • Striking conservation of ATP/GTP binding domains and dynamin family signatures was observed between trout, avian, and mammalian Mx proteins.
    • Distinct immunohistochemical staining patterns were observed for RBTMx1, RBTMx2, and RBTMx3 in transfected cells, similar to rat and human Mx proteins.

    Conclusions:

    • Rainbow trout Mx proteins share conserved structural domains with Mx proteins from other vertebrate species.
    • The distinct cellular localization patterns suggest specialized roles for different trout Mx proteins.
    • The specific antiviral functions of rainbow trout Mx proteins remain to be definitively established.