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Antiviral agents

Rapid Evolution of IFIT1 Gene Influences Antiviral Specificity Across Mammalian Orders

Strategic Insights

— 1 min read

Research from University of Texas Southwestern Medical Center has shed light on the evolution of the IFIT1 gene, which plays a crucial role in recognizing and binding to specific viral RNAs. Scientists have discovered that the IFIT1 gene is rapidly evolving across 11 mammalian orders, with positive selection acting upon several residues in distinct regions of the protein. This research highlights the intricate relationships between viruses and their hosts, and the complex mechanisms that shape the antiviral activity of IFIT1 genes.

Key Takeaways:

  • The IFIT1 gene is rapidly evolving across 11 mammalian orders, with positive selection acting upon several residues in distinct regions of the protein.
  • The research demonstrates that IFIT1 exhibits a range of antiviral phenotypes, with many orthologs lacking antiviral activity against viruses that are strongly suppressed by other IFIT1s.
  • The study found that amino acids 364 and 366 are sufficient to confer the differential anti-VEEV activity between human and chimpanzee IFIT1.
  • The antiviral specificity of IFIT1 is influenced by virus-host genetic conflicts across diverse mammalian orders.
  • The research highlights the importance of understanding the complex relationships between viruses and their hosts in shaping the evolution of antiviral genes.
  • The study provides new insights into the mechanisms that shape the antiviral activity of IFIT1 genes, and has implications for the development of new therapeutic strategies.

Statistics:

  • 11 mammalian orders are affected by the rapid evolution of the IFIT1 gene.
  • 39 IFIT1s spanning diverse mammals were tested in functional assays.
  • The study found that 20 IFIT1s exhibited antiviral activity against Venezuelan equine encephalitis virus (VEEV).
  • 15 IFIT1s exhibited minimal antiviral activity against VEEV.
  • The study detected 8 amino acid differences between human and chimpanzee IFIT1.

Sources:

  • IFIT1 is rapidly evolving and exhibits disparate antiviral activities across 11 mammalian orders. eLife, 2025,13. (eLife - https://elifesciences.org)
  • University of Texas Southwestern Medical Center, Dallas, United States.

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