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Nuclear transporter Importin-13 plays a key role in the oxidative stress transcriptional response

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  • K. A. Gajewska

    (Monash University)

  • H. Lescesen

    (Monash University)

  • M. Ramialison

    (Monash University)

  • K. M. Wagstaff

    (Monash University)

  • D. A. Jans

    (Monash University)

Abstract

The importin superfamily member Importin-13 is a bidirectional nuclear transporter. To delineate its functional roles, we performed transcriptomic analysis on wild-type and Importin-13-knockout mouse embryonic stem cells, revealing enrichment of differentially expressed genes involved in stress responses and apoptosis regulation. De novo promoter motif analysis on 277 Importin-13-dependent genes responsive to oxidative stress revealed an enrichment of motifs aligned to consensus sites for the transcription factors specificity protein 1, SP1, or Kruppel like factor 4, KLF4. Analysis of embryonic stem cells subjected to oxidative stress revealed that Importin-13-knockout cells were more resistant, with knockdown of SP1 or KLF4 helping protect wild-type embryonic stem cells against stress-induced death. Importin-13 was revealed to bind to SP1 and KLF4 in a cellular context, with a key role in oxidative stress-dependent nuclear export of both transcription factors. The results are integral to understanding stress biology, highlighting the importance of Importin-13 in the stress response.

Suggested Citation

  • K. A. Gajewska & H. Lescesen & M. Ramialison & K. M. Wagstaff & D. A. Jans, 2021. "Nuclear transporter Importin-13 plays a key role in the oxidative stress transcriptional response," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26125-x
    DOI: 10.1038/s41467-021-26125-x
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    References listed on IDEAS

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