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Author Spotlight: Detection of Mitophagy in Caenorhabditis elegans and Mammalian Cells Using Organelle-Specific Dyes
Published on: May 19, 2023
Current opinions on mitophagy in fungi
Zi-Fang Shen1,2, Lin Li1, Xue-Ming Zhu1
1State Key Laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro-products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China.
Abstract:
Mitophagy, as one of the most important cellular processes to ensure quality control of mitochondria, aims at transporting damaged, aging, dysfunctional or excess mitochondria to vacuoles (plants and fungi) or lysosomes (mammals) for degradation and recycling. The normal functioning of mitophagy is critical for cellular homeostasis from yeasts to humans. Although the role of mitophagy has been well studied in mammalian cells and in certain model organisms, especially the budding yeast Saccharomyces cerevisiae, our understanding of its significance in other fungi, particularly in pathogenic filamentous fungi, is still at the preliminary stage. Recent studies have shown that mitophagy plays a vital role in spore production, vegetative growth and virulence of pathogenic fungi, which are very different from its roles in mammal and yeast. In this review, we summarize the functions of mitophagy for mitochondrial quality and quantity control, fungal growth and pathogenesis that have been reported in the field of molecular biology over the past two decades. These findings may help researchers and readers to better understand the multiple functions of mitophagy and provide new perspectives for the study of mitophagy in fungal pathogenesis.Abbreviations: AIM/LIR: Atg8-family interacting motif/LC3-interacting region; BAR: Bin-Amphiphysin-Rvs; BNIP3: BCL2 interacting protein 3; CK2: casein kinase 2; Cvt: cytoplasm-to-vacuole targeting; ER: endoplasmic reticulum; IMM: inner mitochondrial membrane; mETC: mitochondrial electron transport chain; OMM: outer mitochondrial membrane; OPTN: optineurin; PAS: phagophore assembly site; PD: Parkinson disease; PE: phosphatidylethanolamine; PHB2: prohibitin 2; PX: Phox homology; ROS, reactive oxygen species; TM: transmembrane.
Insights
Mitophagy, the cellular process of degrading damaged mitochondria, is crucial for homeostasis. Its roles in pathogenic fungi, impacting growth and virulence, differ significantly from its functions in mammals and yeast.
Area of Science:
- Molecular Biology
- Cellular Biology
- Mycology
Background:
- Mitophagy is essential for mitochondrial quality control and cellular homeostasis in eukaryotes.
- While well-studied in mammals and yeast (Saccharomyces cerevisiae), its role in pathogenic filamentous fungi remains underexplored.
- Recent research highlights distinct functions of mitophagy in fungal pathogenesis.
Purpose of the Study:
- To review the functions of mitophagy in mitochondrial quality and quantity control.
- To summarize mitophagy's roles in fungal growth and pathogenesis over the past two decades.
- To provide new perspectives on mitophagy in the context of fungal pathogenesis.
Main Methods:
- Literature review of studies on mitophagy in fungi.
- Analysis of molecular mechanisms underlying mitophagy in various fungal species.
- Comparison of mitophagy functions across different organisms (mammals, yeast, pathogenic fungi).
Main Results:
- Mitophagy is vital for maintaining mitochondrial health and cellular balance.
- In pathogenic fungi, mitophagy influences spore production, vegetative growth, and virulence.
- These roles diverge from those observed in mammalian cells and model yeasts.
Conclusions:
- Mitophagy plays multifaceted roles beyond basic mitochondrial quality control, particularly in pathogenic fungi.
- Understanding mitophagy in fungi offers insights into fungal biology and pathogenesis.
- Further research into fungal mitophagy can reveal novel therapeutic targets.
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