Inner mitochondrial membrane protein Prohibitin 1 mediates Nix-induced, Parkin-independent mitophagy

Kibrom M. Alula, Yaritza Delgado-Deida, Rosemary Callahan, Andreas Till, Lucia Underwood, Winston E. Thompson, Rhonda F. Souza, Themistocles Dassopoulos, Joseph Onyiah, K. Venuprasad, Arianne L. Theiss

Research output: Contribution to journalArticlepeer-review


Autophagy of damaged mitochondria, called mitophagy, is an important organelle quality control process involved in the pathogenesis of inflammation, cancer, aging, and age-associated diseases. Many of these disorders are associated with altered expression of the inner mitochondrial membrane (IMM) protein Prohibitin 1. The mechanisms whereby dysfunction occurring internally at the IMM and matrix activate events at the outer mitochondrial membrane (OMM) to induce mitophagy are not fully elucidated. Using the gastrointestinal epithelium as a model system highly susceptible to autophagy inhibition, we reveal a specific role of Prohibitin-induced mitophagy in maintaining intestinal homeostasis. We demonstrate that Prohibitin 1 induces mitophagy in response to increased mitochondrial reactive oxygen species (ROS) through binding to mitophagy receptor Nix/Bnip3L and independently of Parkin. Prohibitin 1 is required for ROS-induced Nix localization to mitochondria and maintaining homeostasis of epithelial cells highly susceptible to mitochondrial dysfunction.

Original languageEnglish (US)
Article number18
JournalScientific reports
Issue number1
StatePublished - Dec 2023

ASJC Scopus subject areas

  • General


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