GO:0010917 negative regulation of mitochondrial membrane potential: Mitochondrial Depolarization, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0010917 describes any process that stops, prevents, or reduces the mitochondrial membrane potential, the electrical charge difference across the inner mitochondrial membrane.
• Loss of mitochondrial membrane potential is a hallmark of mitochondrial dysfunction and precedes events such as ferroptosis, mitophagy, and apoptosis [1,2].
• Key regulators include the mitochondrial calcium uniporter complex, PINK1/Parkin, ATP synthase (IF1), and caveolin-1, which modulate depolarization through calcium, mitophagy, and metabolic switches [1,2,5,8].
• Experimental models for studying this process include knockout, point-mutation, knock-in, and overexpression cell lines, as well as CRISPR library screening [1,2,4,6].
• Dysregulation of mitochondrial membrane potential is linked to neurodegeneration, cancer, diabetic retinopathy, and impaired dentinogenesis [1,3,4,7].
• EDITGENE provides CRISPR-based services to dissect the genetic control of mitochondrial membrane potential in disease-relevant models.
Description
The mitochondrial membrane potential (ΔΨm) is the electric potential across the inner mitochondrial membrane, generated by proton pumping in the electron transport chain. It is essential for ATP synthesis, calcium buffering, and mitochondrial quality control [1,2]. The Gene Ontology term GO:0010917, negative regulation of mitochondrial membrane potential, captures any biological process that reduces or prevents this potential, a critical event in cellular stress responses and disease [1,2]. Understanding this process is vital because mitochondrial depolarization is an early signal in ferroptosis, mitophagy, and apoptosis, and its dysregulation contributes to neurodegeneration, cancer, and metabolic disorders [1,2,4,7]. Researchers study this term to identify genes and pathways that control mitochondrial health, and to develop therapeutic strategies targeting mitochondrial dysfunction [1,3,5,8].
negative regulation of mitochondrial membrane potential At A Glance
| GO ID | GO:0010917 |
|---|---|
| GO term | negative regulation of mitochondrial membrane potential |
| Ontology | biological_process |
| Synonym | reduction of mitochondrial membrane potential |
| Definition | Any process that stops, prevents, or reduces the frequency, rate or extent of establishment or extent of a mitochondrial membrane potential, the electric potential existing across any mitochondrial membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane. |
| Major function | Reduction of the electrical potential across mitochondrial membranes, often triggering mitophagy, ferroptosis, or apoptosis. |
| Related processes | Mitochondrial calcium homeostasis, oxidative phosphorylation, mitophagy, ferroptosis, apoptosis. |
| Key regulators | MCU complex, PINK1/Parkin, ATP synthase (IF1), caveolin-1, miR-615-3p. |
| Disease relevance | Neurodegeneration, cancer, diabetic retinopathy, dentinogenesis imperfecta. |
What Is GO:0010917?
GO:0010917, negative regulation of mitochondrial membrane potential, is defined as any process that stops, prevents, or reduces the frequency, rate, or extent of the establishment or maintenance of a mitochondrial membrane potential. The mitochondrial membrane potential is the electric potential existing across any mitochondrial membrane, arising from charges in the membrane itself and from charges present in the media on either side of the membrane. In simpler terms, it is the biological process that lowers or abolishes the voltage across mitochondrial membranes, often leading to mitochondrial dysfunction [1,2].
Why Is negative regulation of mitochondrial membrane potential Important in Cell Biology?
The negative regulation of mitochondrial membrane potential is a central node in cellular stress responses and disease. It serves as a switch for mitophagy, ferroptosis, and apoptosis, and its dysregulation is implicated in neurodegeneration, cancer, and metabolic disorders [1,2,4,7]. Understanding the genetic and molecular control of this process is essential for developing therapies that target mitochondrial dysfunction [1,3,5,8].
• Loss of mitochondrial membrane potential is an early event in ferroptosis, a form of regulated cell death.
• Depolarization triggers PINK1 stabilization and Parkin activation, initiating mitophagy.
• Mitochondrial membrane potential regulates ATP synthase hydrolytic activity and thermogenesis in brown fat.
• Caveolin-1 promotes mitochondrial health by limiting ROS and supporting basal mitophagic flux.
• Inhibition of miR-615-3p enhances dentinogenesis via PVT1-mediated mitochondrial regulation.
• Mitochondrial damage activates the cGAS-STING pathway in triple-negative breast cancer.
• Impaired mitochondrial glutathione transport contributes to diabetic retinopathy.
• Proteasome regulation influences petite-negativity in fission yeast, linking mitochondrial function to cell fate.
• Modulating mitochondrial calcium uniporter complex protects neurons against ferroptosis.
• Targeting mitochondrial membrane potential is a promising therapeutic strategy in cancer and neurodegeneration [1,4].
What Happens During negative regulation of mitochondrial membrane potential?
Initiation by mitochondrial calcium overload
In simple terms: Too much calcium inside mitochondria can cause them to lose their electrical charge.
The mitochondrial calcium uniporter complex (MCU) mediates calcium uptake into the mitochondrial matrix. Negative modulation of this complex protects neurons against ferroptosis by preventing calcium-induced mitochondrial depolarization. Thus, calcium overload is a primary trigger for reducing mitochondrial membrane potential.
PINK1/Parkin-mediated mitophagy
In simple terms: When mitochondria lose their charge, a quality-control system tags them for recycling.
PINK1 is selectively stabilized on impaired mitochondria with reduced membrane potential, where it recruits and activates Parkin to initiate mitophagy. This process ensures that depolarized mitochondria are removed, maintaining cellular health.
ATP synthase reversal and thermogenesis
In simple terms: Mitochondria can reverse their ATP synthase to burn energy and generate heat when the charge drops.
IF1 is a cold-regulated switch of ATP synthase hydrolytic activity that supports thermogenesis in brown fat. This switch is associated with changes in mitochondrial membrane potential, highlighting a physiological role for negative regulation of ΔΨm.
Caveolin-1 and ROS regulation
In simple terms: A protein called caveolin-1 helps keep mitochondria healthy by controlling reactive oxygen species and recycling.
Caveolin-1 promotes mitochondrial health and limits mitochondrial ROS through ROCK/AMPK regulation of basal mitophagic flux. This regulation indirectly influences mitochondrial membrane potential by maintaining mitochondrial quality.
miR-615-3p and PVT1-mediated mitochondrial regulation
In simple terms: A microRNA and a long non-coding RNA work together to control mitochondrial function in stem cells.
Inhibition of miR-615-3p enhances dentinogenesis in SCAPs via PVT1-mediated mitochondrial regulation. This pathway involves modulation of mitochondrial membrane potential, linking non-coding RNAs to mitochondrial function in differentiation.
Key Genes Involved in GO:0010917 negative regulation of mitochondrial membrane potential
The following genes and proteins are experimentally implicated in the regulation of mitochondrial membrane potential, based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| MCU | Mitochondrial calcium uniporter; mediates calcium uptake | Negative modulation protects neurons against ferroptosis |
| PINK1 | Serine/threonine kinase; stabilized on depolarized mitochondria | Initiates mitophagy by recruiting Parkin |
| PRKN (Parkin) | E3 ubiquitin ligase; activated by PINK1 | Ubiquitinates mitochondrial proteins to trigger mitophagy |
| ATP5F1 (ATP synthase) | ATP synthesis and hydrolysis; regulated by IF1 | IF1 switch supports thermogenesis in brown fat |
| CAV1 (Caveolin-1) | Scaffolding protein in caveolae; regulates mitophagy | Promotes mitochondrial health and limits ROS |
| MIR615 (miR-615-3p) | MicroRNA; post-transcriptional regulator | Inhibition enhances dentinogenesis via PVT1 |
| PVT1 | Long non-coding RNA; regulates mitochondrial function | Mediates miR-615-3p effects on dentinogenesis |
| cGAS (MB21D1) | DNA sensor; activates STING pathway | Mitochondrial damage activates cGAS-STING in TNBC |
| STING1 (TMEM173) | Adaptor in innate immune signaling | Mediates mitochondrial damage-induced inflammation |
| SLC25A (mitochondrial carriers) | Transport glutathione and other metabolites | Mitochondrial glutathione transport in diabetic retinopathy |
| Proteasome subunits | Protein degradation; regulate mitochondrial function | Proteasome regulation of petite-negativity in fission yeast |
| ROCK | Rho-associated kinase; regulates AMPK | Caveolin-1 modulates ROCK/AMPK for mitophagy |
| AMPK | Energy sensor; promotes mitophagy | Caveolin-1 limits ROS through AMPK |
| Ferroptosis regulators (GPX4, etc.) | Lipid peroxidation and iron metabolism | MCU complex modulation protects against ferroptosis |
| Mitophagy receptors (BNIP3, FUNDC1) | Autophagic removal of mitochondria | Downstream of PINK1/Parkin and depolarization |
| Apoptosis effectors (BAX, BAK) | Mitochondrial outer membrane permeabilization | Linked to loss of membrane potential |
| Uncoupling proteins (UCP1) | Proton leak; reduces membrane potential | Thermogenesis in brown fat |
How Is negative regulation of mitochondrial membrane potential Regulated?
The negative regulation of mitochondrial membrane potential is controlled by multiple signaling pathways. The PINK1/Parkin pathway is a key regulator: PINK1 is stabilized on depolarized mitochondria and activates Parkin to initiate mitophagy. The MCU complex modulates calcium-induced depolarization, and its inhibition protects against ferroptosis. Caveolin-1 regulates basal mitophagic flux through ROCK/AMPK signaling, thereby influencing mitochondrial membrane potential. IF1 regulates ATP synthase hydrolytic activity in response to cold, linking thermogenesis to membrane potential changes. Non-coding RNAs such as miR-615-3p and PVT1 also participate in mitochondrial regulation. Additionally, proteasome activity affects mitochondrial function in fission yeast.
negative regulation of mitochondrial membrane potential and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MCU | Neurodegeneration / ferroptosis | Knockout or point-mutation neuronal cell lines |
| PINK1 | Parkinson's disease / mitophagy | Knockout or knock-in iPSC-derived neurons |
| CAV1 | Metabolic disorders / mitochondrial health | Overexpression or knockout in fibroblasts |
| MIR615 | Dentinogenesis / stem cell differentiation | Overexpression or inhibition in SCAPs |
| SLC25A | Diabetic retinopathy / glutathione transport | Knockout in retinal endothelial cells |
Neurodegeneration and ferroptosis
Negative modulation of the mitochondrial calcium uniporter complex protects neurons against ferroptosis, a form of cell death linked to neurodegeneration. PINK1/Parkin-mediated mitophagy is critical for neuronal survival, and mutations in PINK1 or PRKN cause early-onset Parkinson's disease. Thus, dysregulation of mitochondrial membrane potential contributes to neurodegenerative disorders.
Cancer
Activation of the cGAS-STING pathway by clofoctol through mitochondrial damage in triple-negative breast cancer highlights the role of mitochondrial membrane potential in cancer therapy. Mitochondrial depolarization can trigger innate immune signaling and cell death in cancer cells, making it a potential therapeutic target.
Diabetic retinopathy
Mitochondrial transport of glutathione is impaired in diabetic retinopathy, leading to mitochondrial dysfunction and loss of membrane potential. This contributes to retinal cell death and vision loss.
Dentinogenesis and stem cell differentiation
Inhibition of miR-615-3p enhances dentinogenesis in SCAPs via PVT1-mediated mitochondrial regulation. This links mitochondrial membrane potential to odontogenic differentiation and dental tissue regeneration.
From negative regulation of mitochondrial membrane potential-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate mitochondrial membrane potential? | Knockout cell line (e.g., CRISPR-Cas9) [1,2] |
| Does a specific mutation affect depolarization? | Point-mutation knock-in cell line |
| Does overexpression of gene Y alter membrane potential? | Overexpression cell line |
| Can a tagged protein track mitochondrial localization? | Tagged knock-in (e.g., GFP) |
| Which genes are essential for mitochondrial membrane potential? | CRISPR library screening [4,6] |
| Does a non-coding RNA regulate mitochondrial function? | Overexpression or knockout of lncRNA/miRNA |
How to Study the negative regulation of mitochondrial membrane potential Process
| Method | What It Measures | Typical Application |
|---|---|---|
| JC-1 staining | Mitochondrial membrane potential | Detection of depolarization in live cells |
| TMRM | Mitochondrial membrane potential | Quantitative assessment of ΔΨm |
| Mito-Keima | Mitophagy flux | Monitoring PINK1/Parkin-dependent mitophagy |
| Calcium imaging | Mitochondrial calcium levels | Studying MCU complex activity |
| CRISPR screen | Gene essentiality for membrane potential | Identifying regulators of depolarization |
| RNA-seq | Transcriptional changes | Pathway analysis after depolarization |
| Proteomics | Protein abundance and modifications | Detecting mitochondrial protein changes |
| Seahorse assay | Oxygen consumption rate | Measuring mitochondrial respiration |
Measuring mitochondrial membrane potential
Fluorescent dyes such as JC-1 or TMRM are commonly used to measure mitochondrial membrane potential in live cells. Loss of potential is indicated by a shift in fluorescence [1,2].
Mitophagy assays
Mitophagy can be assessed by tracking the colocalization of mitochondria with autophagosomes or by using mito-Keima reporters. PINK1/Parkin-dependent mitophagy is a key readout [2,8].
Calcium imaging
Mitochondrial calcium levels can be measured using genetically encoded sensors (e.g., mito-R-GECO) to study MCU complex activity and its effect on membrane potential.
CRISPR screening and bioinformatics
Genome-wide CRISPR knockout screens coupled with membrane potential reporters can identify genes that regulate mitochondrial depolarization. Bioinformatics analysis of transcriptomic or proteomic data can reveal pathways [4,6].
How CRISPR Can Be Used to Study GO:0010917 negative regulation of mitochondrial membrane potential
Knockout
CRISPR-Cas9 knockout of genes such as MCU or PINK1 can be used to study their role in negative regulation of mitochondrial membrane potential. For example, MCU knockout protects neurons against ferroptosis, and PINK1 knockout abolishes mitophagy.
Point Mutation
Introducing point mutations in genes like PINK1 or PRKN can mimic disease-associated variants and reveal their impact on mitochondrial membrane potential. This is useful for studying Parkinson's disease mechanisms.
Knock-in
Knock-in of tagged proteins (e.g., GFP-PINK1) allows real-time tracking of protein localization to depolarized mitochondria. This helps visualize the dynamics of mitophagy.
Overexpression
Overexpression of caveolin-1 or IF1 can enhance mitochondrial health or thermogenesis, respectively, by modulating membrane potential [5,8]. Overexpression of miR-615-3p or PVT1 can also affect mitochondrial function in stem cells.
How EDITGENE Supports negative regulation of mitochondrial membrane potential Research
Researchers studying negative regulation of mitochondrial membrane potential-related genes often need to determine whether a candidate gene is causally involved in mitochondrial depolarization, mitophagy, or disease. EDITGENE provides a comprehensive suite of CRISPR services to enable such investigations.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of mitochondrial membrane potential research.
Frequently Asked Questions About negative regulation of mitochondrial membrane potential
What is GO:0010917?
GO:0010917 is the Gene Ontology term for negative regulation of mitochondrial membrane potential, describing any process that reduces or prevents the electrical potential across mitochondrial membranes.
What genes are involved in negative regulation of mitochondrial membrane potential?
Key genes include MCU, PINK1, PRKN, CAV1, ATP5F1, MIR615, and PVT1, among others [1,2,3,5,8].
How is mitochondrial membrane potential measured?
It is commonly measured using fluorescent dyes such as JC-1 or TMRM, which report changes in the electrical potential across the inner mitochondrial membrane [1,2].
Why is loss of mitochondrial membrane potential important in disease?
Loss of mitochondrial membrane potential is an early event in ferroptosis, mitophagy, and apoptosis, and is linked to neurodegeneration, cancer, and diabetic retinopathy [1,2,4,7].
What is the role of PINK1 in mitochondrial membrane potential?
PINK1 is stabilized on depolarized mitochondria and activates Parkin to initiate mitophagy, thereby regulating mitochondrial quality control.
How does calcium affect mitochondrial membrane potential?
Calcium overload through the MCU complex can cause mitochondrial depolarization; inhibiting this complex protects against ferroptosis.
Can CRISPR be used to study mitochondrial membrane potential?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect genes regulating mitochondrial membrane potential [1,2,4,6].
What diseases are associated with dysregulated mitochondrial membrane potential?
Neurodegenerative diseases like Parkinson's, triple-negative breast cancer, diabetic retinopathy, and dental differentiation defects have been linked to mitochondrial membrane potential dysregulation [1,2,3,4,7].
What is the connection between caveolin-1 and mitochondrial health?
Caveolin-1 promotes mitochondrial health and limits ROS through ROCK/AMPK regulation of basal mitophagic flux, indirectly influencing membrane potential.
How does IF1 regulate mitochondrial membrane potential?
IF1 acts as a cold-regulated switch of ATP synthase hydrolytic activity to support thermogenesis in brown fat, which involves changes in mitochondrial membrane potential.
Conclusion
GO:0010917, negative regulation of mitochondrial membrane potential, is a critical biological process that governs mitochondrial quality control, cell death, and metabolism. Its dysregulation is implicated in a wide range of diseases, from neurodegeneration to cancer. Understanding the genes and mechanisms involved offers promising therapeutic avenues. EDITGENE provides advanced CRISPR tools to accelerate research in this field.
References
- 1. Marmolejo-Garza A et al.. 2023. Negative modulation of mitochondrial calcium uniporter complex protects neurons against ferroptosis.. Cell Death Dis 14(11):772 PMID: 38007529
- 2. Narendra DP et al.. 2010. PINK1 is selectively stabilized on impaired mitochondria to activate Parkin.. PLoS Biol 8(1):e1000298 PMID: 20126261
- 3. Yang H et al.. 2025. Inhibition of miR-615-3p enhances dentinogenesis in scap(s) via PVT1-mediated mitochondrial regulation.. Stem Cell Res Ther 16(1):416 PMID: 40745571
- 4. Wang L et al.. 2025. Activation of the cGAS-STING pathway by clofoctol through mitochondrial damage in triple-negative breast cancer.. J Transl Med 24(1):70 PMID: 41430270
- 5. Brunetta HS et al.. 2024. IF1 is a cold-regulated switch of ATP synthase hydrolytic activity to support thermogenesis in brown fat.. EMBO J 43(21):4870-4891 PMID: 39284909
- 6. Amberg KL et al.. 2025. Proteasome regulation of petite-negativity in fission yeast.. BMC Biol 23(1):302 PMID: 41068765
- 7. Kowluru RA et al.. 2025. Mitochondrial transport of glutathione in diabetic retinopathy.. Free Radic Biol Med 237:357-368 PMID: 40490204
- 8. Timmins LR et al.. 2024. Caveolin-1 promotes mitochondrial health and limits mitochondrial ROS through ROCK/AMPK regulation of basal mitophagic flux.. FASEB J 38(1):e23343 PMID: 38071602
