How are specific dysfunctional #mitochondria removed under steady-state conditions?

Julia Pagan and coworkers (University of Queensland) show that an #SCF #ubiquitin #ligase based on #FBXL4, mutated in #MTDPS13, limits basal #mitophagy via #ubiquitination of #NIX and #BNIP3 receptors

https://www.embopress.org/doi/10.15252/embj.2022112767

What controls basal, #Parkin-independent #mitophagy?

E3 #ubiquitin #ligase screen by Sylvie Urbé, Michael Clague and coworkers identifies #VHL and #FBXL4 as negative regulators of mitophagy receptors #NIX and #BNIP3 via transcriptional and direct post-translational mechanisms, respectively

https://www.embopress.org/doi/10.15252/embj.2022112799

How do FBXL4 mutations lead to #encephalomyopathic #mtDNA depletion syndrome 13?

Hui Jiang et al find increased #mitochondrial loss and perinatal lethality in Fbxl4 KO mice due to increased levels of #mitophagy receptors #BNIP3 and NIX targeted by SCF-#FBXL4 #ubiquitin ligase

https://www.embopress.org/doi/10.15252/embj.2022113033