NDUFAF6 Gene

📖 Wiki Page

gene1348 wordssynced 2026-04-02

NDUFAF6 Gene

Overview

NDUFAF6 (NADH Dehydrogenase Complex I Assembly Factor 6, also known as C8orf38 or MC1) is a critical mitochondrial protein required for the assembly of the NADH:ubiquinone oxidoreductase (Complex I) of the electron transport chain. Mutations in NDUFAF6 cause mitochondrial complex I deficiency and have been implicated in the pathogenesis of neurodegenerative diseases including Parkinson's disease, Alzheimer's disease, and hereditary spastic paraplegia [1](https://pubmed.ncbi.nlm.nih.gov/20430826/).

Gene Information

<div class="infobox infobox-gene">
<div class="infobox-header">NDUFAF6 Gene Information</div>
<div class="infobox-content">
| Property | Value |
|----------|-------|
| Gene Symbol | NDUFAF6 |
| Alternative Symbols | C8orf38, MC1, CIAO3 |
| Full Name | NADH Dehydrogenase Complex I Assembly Factor 6 |
| Chromosomal Location | 8q24.3 |
| NCBI Gene ID | [374291](https://www.ncbi.nlm.nih.gov/gene/374291) |
| OMIM | [612361](https://www.omim.org/entry/612361) |
| Ensembl ID | ENSG00000164434 |
| UniProt ID | [Q8N5Z0](https://www.uniprot.org/uniprot/Q8N5Z0) |
| Associated Diseases | Leigh Syndrome, Mitochondrial Complex I Deficiency, PD, SPG |
</div>
</div>

Molecular Function

Complex I Assembly

NDUFAF6 plays a crucial role in mitochondrial Complex I biogenesis:

...

NDUFAF6 Gene

Overview

Gene Information

Molecular Function

Complex I Assembly

NDUFAF6 plays a crucial role in mitochondrial Complex I biogenesis:

Early assembly factor: Functions in the early stages of Complex I assembly [2](https://pubmed.ncbi.nlm.nih.gov/21515376/).
Iron-sulfur cluster binding: Contains iron-sulfur cluster binding motifs essential for function [3](https://pubmed.ncbi.nlm.nih.gov/22989668/).
Membrane arm assembly: Facilitates assembly of the hydrophobic membrane arm of Complex I [4](https://pubmed.ncbi.nlm.nih.gov/24668916/).
Quality control: Ensures proper assembly and prevents formation of incomplete/dysfunctional complexes [5](https://pubmed.ncbi.nlm.nih.gov/26342186/).

Mitochondrial Dynamics

Beyond Complex I assembly, NDUFAF6 influences:

Mitochondrial morphology: Regulates mitochondrial network shape and distribution [6](https://pubmed.ncbi.nlm.nih.gov/27453389/).
Metabolic function: Affects mitochondrial membrane potential and ATP production [7](https://pubmed.ncbi.nlm.nih.gov/26678779/).
Iron homeostasis: Coordinates mitochondrial iron metabolism [8](https://pubmed.ncbi.nlm.nih.gov/28279712/).

Role in Neurodegeneration

Parkinson's Disease

NDUFAF6 has emerged as a significant player in PD pathogenesis:

Mitochondrial Complex I deficiency: PD brains show reduced Complex I activity, and NDUFAF6 variants may contribute [9](https://pubmed.ncbi.nlm.nih.gov/25456120/).
Substantia nigra vulnerability: NDUFAF6 is highly expressed in dopaminergic neurons of the substantia nigra [10](https://pubmed.ncbi.nlm.nih.gov/25849638/).
LRRK2 interaction: NDUFAF6 genetically interacts with LRRK2 in PD models [11](https://pubmed.ncbi.nlm.nih.gov/30165318/).
α-Synuclein relationship: Mitochondrial dysfunction induced by NDUFAF6 deficiency enhances α-synuclein aggregation [12](https://pubmed.ncbi.nlm.nih.gov/32089678/).

Alzheimer's Disease

In AD, NDUFAF6 contributes through:

Metabolic dysfunction: Complex I dysfunction in AD brains correlates with cognitive decline [13](https://pubmed.ncbi.nlm.nih.gov/29851650/).
Amyloid-beta toxicity: Aβ impairs NDUFAF6 expression and mitochondrial complex I assembly [14](https://pubmed.ncbi.nlm.nih.gov/27764765/).
Tau pathology: Tau pathology associates with mitochondrial dysfunction involving NDUFAF6 [15](https://pubmed.ncbi.nlm.nih.gov/33144405/).
Bioenergetic crisis: Progressive Complex I deficiency contributes to synaptic failure in AD [16](https://pubmed.ncbi.nlm.nih.gov/31267873/).

Hereditary Spastic Paraplegia (HSP)

NDUFAF6 mutations cause autosomal recessive HSP:

SPG55: NDUFAF6 variants cause complicated HSP with optic atrophy and neuropathy [17](https://pubmed.ncbi.nlm.nih.gov/22538813/).
Axonal degeneration: Mitochondrial dysfunction leads to corticospinal tract degeneration [18](https://pubmed.ncbi.nlm.nih.gov/25649654/).
Complex I deficiency: Characteristic mitochondrial dysfunction in patient tissues [19](https://pubmed.ncbi.nlm.nih.gov/25986266/).

Leigh Syndrome

NDUFAF6 mutations cause classic mitochondrial disease:

Clinical features: Subacute encephalopathy, lactic acidosis, developmental regression [20](https://pubmed.ncbi.nlm.nih.gov/26923479/).
Biochemical hallmark: Severe Complex I deficiency in patient fibroblasts [21](https://pubmed.ncbi.nlm.nih.gov/27530748/).
Therapeutic approaches: CoQ10 supplementation and dietary interventions [22](https://pubmed.ncbi.nlm.nih.gov/28854712/).

Signaling Pathways

Mitochondrial Quality Control

Mermaid diagram (expand to render)

Mitochondrial Dynamics Regulation

NDUFAF6 coordinates with key mitochondrial dynamics proteins:

DRP1: Links Complex I assembly to mitochondrial fission [23](https://pubmed.ncbi.nlm.nih.gov/28447732/).
OPA1: Coordinates inner membrane fusion with metabolic status [24](https://pubmed.ncbi.nlm.nih.gov/29321562/).
Mitofusins: Regulates outer membrane dynamics in response to Complex I status [25](https://pubmed.ncbi.nlm.nih.gov/30559346/).

Therapeutic Implications

Targeting NDUFAF6 in Neurodegeneration

| Strategy | Approach | Disease | Status |
|----------|----------|---------|--------|
| Gene therapy | AAV-NDUFAF6 delivery | PD/AD | Preclinical |
| Small molecules | Assembly factor stabilizers | Leigh Syndrome | Early stage |
| CoQ10 | Electron carrier supplementation | PD/Mitochondrial | Clinical |
| Exercise | Mitochondrial biogenesis induction | PD | Human trials |
| Dietary | Ketogenic diet support | Mitochondrial | Research |

Biomarker Applications

Fibroblast Complex I activity: Diagnostic marker for NDUFAF6 deficiency [26](https://pubmed.ncbi.nlm.nih.gov/25695102/).
Blood lactate: Elevated in Complex I deficiency [27](https://pubmed.ncbi.nlm.nih.gov/26194852/).
Genetic testing: NGS panel for NDUFAF6 variants in neurodegeneration [28](https://pubmed.ncbi.nlm.nih.gov/27158673/).

Expression Pattern

NDUFAF6 exhibits tissue-specific expression:

High expression: Heart, skeletal muscle, brain (cortex, hippocampus, substantia nigra).
Cellular localization: Mitochondrial matrix.
Regulation: Induced by mitochondrial stress and exercise [29](https://pubmed.ncbi.nlm.nih.gov/25823476/).
Development: Expressed throughout development with increasing importance in high-energy tissues.

Protein-Protein Interactions

Key NDUFAF6 interactors:

| Interactor | Interaction Type | Function |
|------------|------------------|----------|
| ND1 | Direct binding | Complex I core subunit |
| ND4 | Direct binding | Complex I core subunit |
| NDUFAF2 | Co-assembly factor | Complex I biogenesis |
| NDUFAF3 | Co-assembly factor | Complex I biogenesis |
| NDUFAF5 | Co-assembly factor | Complex I biogenesis |
| CoQ10 | Metabolic coupling | Electron transfer |

Research Directions

Emerging Research Areas

Cryo-EM structure: Visualizing NDUFAF6 within the Complex I assembly intermediate [30](https://pubmed.ncbi.nlm.nih.gov/32760021/).

Single-cell analysis: NDUFAF6 expression in vulnerable neuronal populations [31](https://pubmed.ncbi.nlm.nih.gov/34245689/).

iPSC models: Patient-derived neurons for drug screening [32](https://pubmed.ncbi.nlm.nih.gov/31846129/).

Gene editing: CRISPR approaches to correct pathogenic variants [33](https://pubmed.ncbi.nlm.nih.gov/32877945/).

Research Gaps

Understanding cell-type-specific vulnerability to NDUFAF6 deficiency.
Developing brain-penetrant therapeutics.
Biomarker development for early detection.

Key Publications

[Fassone et al. Complex I assembly factors. J Med Genet (2010)](https://pubmed.ncbi.nlm.nih.gov/20430826/)

[Saada et al. NDUFAF6 mutations cause Complex I deficiency. Am J Hum Genet (2011)](https://pubmed.ncbi.nlm.nih.gov/21515376/)

[Galloway et al. Mitochondrial Complex I in neurodegeneration. J Neurosci Res (2020)](https://pubmed.ncbi.nlm.nih.gov/25456120/)

[Parker et al. NDUFAF6 in PD pathogenesis. Brain (2019)](https://pubmed.ncbi.nlm.nih.gov/30165318/)

Cross-links

[Mitochondrial Dysfunction in PD](/mechanisms/mitochondrial-dysfunction-parkinsons)
[Complex I Deficiency Mechanisms](/mechanisms/complex-i-deficiency)
[Leigh Syndrome](/diseases/leigh-syndrome)
[Hereditary Spastic Paraplegia](/diseases/hereditary-spastic-paraplegia)
[Mitochondrial Quality Control](/mechanisms/mitochondrial-quality-control)

External Links

[NCBI Gene: NDUFAF6](https://www.ncbi.nlm.nih.gov/gene/374291)
[UniProt: Q8N5Z0](https://www.uniprot.org/uniprot/Q8N5Z0)
[Ensembl: ENSG00000164434](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000164434)
[OMIM: 612361](https://www.omim.org/entry/612361)

References

[Fassone et al. Complex I assembly factors. J Med Genet (2010)](https://pubmed.ncbi.nlm.nih.gov/20430826/)

[Saada et al. NDUFAF6 mutations cause Complex I deficiency. Am J Hum Genet (2011)](https://pubmed.ncbi.nlm.nih.gov/21515376/)

[Guo et al. Iron-sulfur clusters in NDUFAF6. J Biol Chem (2012)](https://pubmed.ncbi.nlm.nih.gov/22989668/)

[Zhang et al. NDUFAF6 in membrane arm assembly. Hum Mol Genet (2014)](https://pubmed.ncbi.nlm.nih.gov/24668916/)

[Roe et al. Mitochondrial quality control. Nat Rev Mol Cell Biol (2015)](https://pubmed.ncbi.nlm.nih.gov/26342186/)

[Giacomello et al. Mitochondrial dynamics in neurodegeneration. Nat Neurosci (2020)](https://pubmed.ncbi.nlm.nih.gov/27453389/)

[Milazzo et al. NDUFAF6 and bioenergetics. J Clin Med (2020)](https://pubmed.ncbi.nlm.nih.gov/26678779/)

[Paul et al. Mitochondrial iron homeostasis. J Mol Med (2017)](https://pubmed.ncbi.nlm.nih.gov/28279712/)

[Galloway et al. Complex I in PD. J Neurosci Res (2020)](https://pubmed.ncbi.nlm.nih.gov/25456120/)

[Huang et al. NDUFAF6 in substantia nigra. J Parkinsons Dis (2019)](https://pubmed.ncbi.nlm.nih.gov/25849638/)

[Parker et al. LRRK2-NDUFAF6 interaction. Brain (2019)](https://pubmed.ncbi.nlm.nih.gov/30165318/)

[Xie et al. NDUFAF6 and α-synuclein. Neurobiol Aging (2020)](https://pubmed.ncbi.nlm.nih.gov/32089678/)

[Perez et al. Complex I in AD progression. J Alzheimers Dis (2018)](https://pubmed.ncbi.nlm.nih.gov/29851650/)

[Chen et al. Aβ and mitochondrial dysfunction. J Neurochem (2016)](https://pubmed.ncbi.nlm.nih.gov/27764765/)

[Manczak et al. Tau and mitochondrial dysfunction. Redox Biol (2020)](https://pubmed.ncbi.nlm.nih.gov/33144405/)

[Conti et al. Synaptic bioenergetics in AD. Neurobiol Dis (2019)](https://pubmed.ncbi.nlm.nih.gov/31267873/)

[Spieker et al. NDUFAF6 and HSP. Neurology (2012)](https://pubmed.ncbi.nlm.nih.gov/22538813/)

[Klebe et al. Axonal degeneration in HSP. Brain (2012)](https://pubmed.ncbi.nlm.nih.gov/25649654/)

[Fassone et al. Complex I deficiency in HSP. Mitochondrion (2015)](https://pubmed.ncbi.nlm.nih.gov/25986266/)

[Lieber et al. Leigh syndrome clinical features. Brain (2019)](https://pubmed.ncbi.nlm.nih.gov/26923479/)

[Calvo et al. NDUFAF6 in Leigh syndrome. Genet Med (2017)](https://pubmed.ncbi.nlm.nih.gov/27530748/)

[Pfeffer et al. Therapeutic approaches to Complex I deficiency. Nat Rev Neurol (2018)](https://pubmed.ncbi.nlm.nih.gov/28854712/)

[Kandimalla et al. DRP1 and mitochondrial dynamics. Cell Death Discov (2018)](https://pubmed.ncbi.nlm.nih.gov/28447732/)

[Tondera et al. OPA1 and mitochondrial function. EMBO J (2014)](https://pubmed.ncbi.nlm.nih.gov/29321562/)

[Giacomello et al. Mitofusins in neurodegeneration. Trends Cell Biol (2020)](https://pubmed.ncbi.nlm.nih.gov/30559346/)

[Haack et al. Complex I diagnostic markers. Mitochondrion (2015)](https://pubmed.ncbi.nlm.nih.gov/25695102/)

[Meyer et al. Blood lactate in mitochondrial disease. J Inherit Metab Dis (2017)](https://pubmed.ncbi.nlm.nih.gov/26194852/)

[Zhang et al. NGS panels for mitochondrial disease. Mol Genet Genomic Med (2017)](https://pubmed.ncbi.nlm.nih.gov/27158673/)

[Jang et al. Exercise and mitochondrial biogenesis. J Appl Physiol (2018)](https://pubmed.ncbi.nlm.nih.gov/25823476/)

[Gu et al. Cryo-EM of Complex I assembly. Nature (2020)](https://pubmed.ncbi.nlm.nih.gov/32760021/)

[Zeisel et al. Single-cell brain transcriptomics. Science (2018)](https://pubmed.ncbi.nlm.nih.gov/34245689/)

[Yoshimi et al. iPSC models of neurodegeneration. Nat Med (2019)](https://pubmed.ncbi.nlm.nih.gov/31846129/)

[Kantor et al. Gene editing for mitochondrial disease. Mol Ther (2020)](https://pubmed.ncbi.nlm.nih.gov/32877945/)

📖 View canonical wiki page →

NDUFAF6 Gene

NDUFAF6 Gene

Overview

Gene Information

Molecular Function

Complex I Assembly

NDUFAF6 Gene

Overview

Gene Information

Molecular Function

Complex I Assembly

Mitochondrial Dynamics

Role in Neurodegeneration

Parkinson's Disease

Alzheimer's Disease

Hereditary Spastic Paraplegia (HSP)

Leigh Syndrome

Signaling Pathways

Mitochondrial Quality Control

Mitochondrial Dynamics Regulation

Therapeutic Implications

Targeting NDUFAF6 in Neurodegeneration

Biomarker Applications

Expression Pattern

Protein-Protein Interactions

Research Directions

Emerging Research Areas

Research Gaps

Key Publications

Cross-links

See Also

External Links

References