Related Experiment Video
Updated: May 23, 2025

Specific Labeling of Mitochondrial Nucleoids for Time-lapse Structured Illumination Microscopy
Published on: June 4, 2020
Quality control of mitochondrial nucleoids
Hao Liu1, Haixia Zhuang2, Du Feng3
1State Key Laboratory of Respiratory Disease, Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, 511436, Guangdong, China; Huaihe Hospital of Henan University, Kaifeng City, 475000, Henan Province, China; The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan, China.
Mitochondrial nucleoids can escape cells during stress, triggering inflammation. Cellular defenses clear these released nucleoids, crucial for preventing disease and maintaining immune balance.
Area of Science:
- Cellular Biology
- Immunology
- Mitochondrial Biology
Background:
- Mitochondrial nucleoids, housing mitochondrial DNA (mtDNA), are normally within mitochondria.
- Cellular stress can cause nucleoid structural changes and release into the cytoplasm.
Purpose of the Study:
- To review mechanisms of mitochondrial nucleoid quality control.
- To explore the link between mitochondrial nucleoid release and cellular immunity.
- To identify therapeutic targets for mtDNA-associated diseases.
Main Methods:
- Literature review of molecular mechanisms.
- Analysis of cellular stress responses.
- Examination of nucleoid clearance pathways.
Main Results:
- Aberrant nucleoid release into the cytoplasm can trigger inflammatory responses and cell death.
- Specific membrane channels facilitate nucleoid release, disrupting homeostasis.
- Cells employ degradation, lysosomal, and excretion pathways for clearance.
Conclusions:
- Mitochondrial nucleoid integrity is vital for cellular homeostasis.
- Dysfunctional nucleoid control contributes to inflammatory disorders.
- Understanding these pathways offers therapeutic potential for mtDNA diseases.
Related Concept Videos
Mitochondrial Protein Sorting
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Animal Mitochondrial Genetics
Porin Insertion in the Outer Mitochondrial Membrane
Three models describe the assembly of porins by the SAM complex and their insertion into the outer membrane. Model 1 suggests that porins are assembled outside the SAM channel as the...
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,...
The Inner Mitochondrial Membrane
Mitochondrial Membranes

