FNDC-1-mediated mitophagy and ATFS-1 coordinate to protect against hypoxia-reoxygenation

Yunki Lim, Brandon Berry, Stephanie Viteri, Matthew McCall, Eun Chan Park, Christopher Rongo, Paul S. Brookes, Keith Nehrke

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Mitochondrial quality control (MQC) balances organelle adaptation and elimination, and mechanistic crosstalk between the underlying molecular processes affects subsequent stress outcomes. FUNDC1 (FUN14 domain containing 1) is a mammalian mitophagy receptor that responds to hypoxia-reoxygenation (HR) stress. Here, we provide evidence that FNDC-1 is the C. elegans ortholog of FUNDC1, and that its loss protects against injury in a worm model of HR. This protection depends upon ATFS-1, a transcription factor that is central to the mitochondrial unfolded protein response (UPRmt). Global mRNA and metabolite profiling suggest that atfs-1-dependent stress responses and metabolic remodeling occur in response to the loss of fndc-1. These data support a role for FNDC-1 in non-hypoxic MQC, and further suggest that these changes are prophylactic in relation to subsequent HR. Our results highlight functional coordination between mitochondrial adaptation and elimination that organizes stress responses and metabolic rewiring to protect against HR injury. Abbreviations: AL: autolysosome; AP: autophagosome; FUNDC1: FUN14 domain containing 1; HR: hypoxia-reperfusion; IR: ischemia-reperfusion; lof: loss of function; MQC: mitochondrial quality control; PCA: principle component analysis; PPP: pentonse phosphate pathway; proK (proteinase K);UPRmt: mitochondrial unfolded protein response; RNAi: RNA interference.

Original languageEnglish (US)
Pages (from-to)3389-3401
Number of pages13
Issue number11
StatePublished - 2021

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology


  • C. elegans
  • hypoxia-reoxygenation (HR)
  • metabolism
  • mitochondrial unfolded protein response (UPRmt)
  • mitophagy


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