Viral targeting of importin alpha-mediated nuclear import to block innate immunity

Olivia A. Vogel, Jade K. Forwood, Daisy W. Leung, Gaya K. Amarasinghe, Christopher F. Basler

Research output: Contribution to journalReview articlepeer-review

1 Citation (Scopus)
11 Downloads (Pure)

Abstract

Cellular nucleocytoplasmic trafficking is mediated by the importin family of nuclear transport proteins. The well-characterized importin alpha (IMPA) and importin beta (IMPB) nuclear import pathway plays a crucial role in the innate immune response to viral infection by mediating the nuclear import of transcription factors such as IRF3, NFκB, and STAT1. The nuclear transport of these transcription factors ultimately leads to the upregulation of a wide range of antiviral genes, including IFN and IFN-stimulated genes (ISGs). To replicate efficiently in cells, viruses have developed mechanisms to block these signaling pathways. One strategy to evade host innate immune responses involves blocking the nuclear import of host antiviral transcription factors. By binding IMPA proteins, these viral proteins prevent the nuclear transport of key transcription factors and suppress the induction of antiviral gene expression. In this review, we describe examples of proteins encoded by viruses from several different families that utilize such a competitive inhibition strategy to suppress the induction of antiviral gene expression.
Original languageEnglish
Article number71
Pages (from-to)1-17
Number of pages17
JournalCells
Volume13
Issue number1
Early online dateDec 2023
DOIs
Publication statusPublished - Jan 2024

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