Related Experiment Video
Updated: Jun 5, 2026

A Fluorescence Microscopy Assay for Monitoring Mitophagy in the Yeast Saccharomyces cerevisiae
Published on: July 18, 2011
Mitochondria autophagy in yeast
Tomotake Kanki1, Daniel J Klionsky, Koji Okamoto
1Department of Clinical Chemistry and Laboratory Medicine, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan.
Abstract:
The mitochondrion is an organelle that carries out a number of important metabolic processes such as fatty acid oxidation, the citric acid cycle, and oxidative phosphorylation. However, this multitasking organelle also generates reactive oxygen species (ROS), which can cause oxidative stress resulting in self-damage. This type of mitochondrial damage can lead to the further production of ROS and a resulting downward spiral with regard to mitochondrial capability. This is extremely problematic because the accumulation of dysfunctional mitochondria is related to aging, cancer, and neurodegenerative diseases. Accordingly, appropriate quality control of this organelle is important to maintain proper cellular homeostasis. It has been thought that selective mitochondria autophagy (mitophagy) contributes to the maintenance of mitochondrial quality by eliminating damaged or excess mitochondria, although little is known about the mechanism. Recent studies in yeast identified several mitophagy-related proteins, which have been characterized with regard to their function and regulation. In this article, we review recent advances in the physiology and molecular mechanism of mitophagy and discuss the similarities and differences of this degradation process between yeast and mammalian cells.
Insights
Mitophagy, the selective removal of damaged mitochondria, is crucial for cellular health. This review explores the molecular mechanisms of mitophagy, highlighting its role in preventing diseases linked to mitochondrial dysfunction.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Mitochondria are vital organelles for cellular metabolism but produce damaging reactive oxygen species (ROS).
- Mitochondrial damage and dysfunction are linked to aging, cancer, and neurodegenerative diseases.
- Maintaining mitochondrial quality control is essential for cellular homeostasis.
Purpose of the Study:
- To review recent advances in the physiology and molecular mechanisms of mitophagy.
- To discuss the regulation and function of mitophagy-related proteins.
- To compare mitophagy processes in yeast and mammalian cells.
Main Methods:
- Literature review of recent studies on mitophagy.
- Analysis of identified mitophagy-related proteins in yeast.
- Comparative analysis of mitophagy mechanisms across species.
Main Results:
- Mitophagy selectively eliminates damaged or excess mitochondria, aiding quality control.
- Several key mitophagy-related proteins have been identified and characterized in yeast.
- Understanding mitophagy mechanisms is crucial for cellular health.
Conclusions:
- Mitophagy is a critical cellular process for maintaining mitochondrial integrity.
- Further research into mitophagy mechanisms can provide insights into age-related and neurodegenerative diseases.
- Comparative studies reveal conserved and divergent aspects of mitophagy between yeast and mammals.
Related Concept Videos
Autophagy
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
Delivery Pathways to the Lysosome
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Autophagic Cell Death
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Translocation of Proteins into the Mitochondria
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Mitochondria
Mitochondria

