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PsAF5 functions as an essential adapter for PsPHB2-mediated mitophagy under ROS stress in Phytophthora sojae

Author

Listed:
  • Wenhao Li

    (Northwest A&F University)

  • Hongwei Zhu

    (Northwest A&F University)

  • Jinzhu Chen

    (Northwest A&F University)

  • Binglu Ru

    (Northwest A&F University)

  • Qin Peng

    (Northwest A&F University)

  • Jianqiang Miao

    (Northwest A&F University)

  • Xili Liu

    (Northwest A&F University
    China Agricultural University)

Abstract

Host-derived reactive oxygen species (ROS) are an important defense means to protect against pathogens. Although mitochondria are the main intracellular targets of ROS, how pathogens regulate mitochondrial physiology in response to oxidative stress remains elusive. Prohibitin 2 (PHB2) is an inner mitochondrial membrane (IMM) protein, recognized as a mitophagy receptor in animals and fungi. Here, we find that an ANK and FYVE domain-containing protein PsAF5, is an adapter of PsPHB2, interacting with PsATG8 under ROS stress. Unlike animal PHB2 that can recruit ATG8 directly to mitochondria, PsPHB2 in Phytophthora sojae cannot recruit PsATG8 to stressed mitochondria without PsAF5. PsAF5 deletion impairs mitophagy under ROS stress and increases the pathogen’s sensitivity to H2O2, resulting in the attenuation of P. sojae virulence. This discovery of a PsPHB2-PsATG8 adapter (PsAF5) in plant-pathogenic oomycetes reveals that mitophagy induction by IMM proteins is conserved in eukaryotes, but with differences in the details of ATG8 recruitment.

Suggested Citation

  • Wenhao Li & Hongwei Zhu & Jinzhu Chen & Binglu Ru & Qin Peng & Jianqiang Miao & Xili Liu, 2024. "PsAF5 functions as an essential adapter for PsPHB2-mediated mitophagy under ROS stress in Phytophthora sojae," Nature Communications, Nature, vol. 15(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46290-z
    DOI: 10.1038/s41467-024-46290-z
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