| Gene Symbol | NCF1 | |---|---| | Full Name | Neutrophil Cytosolic Factor 1 (p47^phox^) | | Chromosomal Location | 7q11.23 | | NCBI Gene ID | [4748](https://www.ncbi.nlm.nih.gov/gene/4748) | | OMIM | [608512](https://www.omim.org/entry/608512) | | Ensembl ID | ENSG00000158517 | | UniProt ID | [P14598](https://www.uniprot.org/uniprot/P14598) | | Associated Diseases | Chronic Granulomatous Disease, Parkinson's Disease, Alzheimer's Disease |
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Overview
Mermaid diagram (expand to render)
Neutrophil Cytosolic Factor 1 (NCF1), also known as p47^phox^, is a critical cytosolic subunit of the NADPH oxidase (NOX2) complex essential for generating [reactive oxygen species](/entities/reactive-oxygen-species) (ROS) in phagocytic cells.[@nauseef2024] The NOX2 complex is a multi-subunit enzyme system that catalyzes the production of superoxide anion (O~2~^•−^) from molecular oxygen, a process fundamental to innate immune defense. NCF1 serves as the organizing center (or organizer) of the complex, facilitating the translocation of cytosolic components to the membrane-bound cytochrome b558 to form the active enzyme complex.[@groemping2022]
In the nervous system, NCF1 is primarily expressed in [microglia](/cell-types/microglia-neuroinflammation), the resident immune cells of the brain. While its primary function is in innate immunity, dysregulated NCF1 activity has been implicated in neurodegenerative diseases. In both Alzheimer's disease (AD) and Parkinson's disease (PD), increased NCF1 expression and activity in microglia contributes to chronic neuroinflammation and oxidative stress, which are hallmark features of these disorders.[@zhang2019][@heneka2019] The dual role of NCF1/NOX2 in both protective immunity and pathological oxidative damage makes it a complex therapeutic target.
Function
NCF1 encodes the p47^phox^ subunit, a critical organizer of the NADPH oxidase complex. It is essential for the assembly and activation of NOX2 (encoded by [CYBB](/genes/cybb)).
Structure
~340 amino acids in length
Multiple domains:
PX domain: Phosphoinositide binding
SH3 domains: Protein-protein interactions
Proline-rich region: Binding partners
Forms part of the cytosolic complex with p67^phox^ (NCF2) and p40^phox^ (NCF4)
Normal Function in the Nervous System
Microglial Function
NADPH oxidase assembly: Essential for NOX2 activation in microglia
Oxidative burst: Critical for microglial pathogen defense
Neuroinflammation: Mediates ROS signaling in neuroimmune communication
Neuronal Function
Lower expression than in microglia
May contribute to neuronal redox homeostasis
Disease Associations
Parkinson's Disease
Enhanced NCF1 activity in PD microglia
Contributes to oxidative stress in substantia nigra
NOX2/NCF1 pathway implicated in dopaminergic neuron death[@zhang2019]
Alzheimer's Disease
Upregulated in microglia around amyloid plaques
Mediates neuroinflammation through ROS production
Contributes to chronic neuroinflammation[@heneka2019]
Chronic Granulomatous Disease (CGD)
Autosomal recessive form caused by NCF1 mutations
Defective NADPH oxidase function
Recurrent infections and inflammation
Expression
Brain Expression
Microglia: Primary expression site
Upregulated in neuroinflammatory conditions
Expression increases with age
Therapeutic Targeting
NCF1/NADPH Oxidase Inhibitors
Apocynin: Inhibits NCF1 translocation
GKT137831: NOX1/NOX4 inhibitor
Targeting NCF1-NOX2 axis may reduce neuroinflammation
[Unknown, Nauseef, W.M., The organization of the phagocyte NADPH oxidase. Nature Reviews Immunology (2024) (2024)](https://doi.org/10.1038/s41577-024-00987-w)
[Unknown, Groemping, Y. & Rittinger, K., Activation and assembly of the NADPH oxidase. Biochemical Journal (2022) (2022)](https://doi.org/10.1042/BJ20220565)
[Zhang et al., NCF1/p47phox in Parkinson's disease. Neurobiology of Aging (2019) (2019)](https://doi.org/10.1016/j.neurobiolaging.2019.01.014)
[Heneka et al., NADPH oxidase in Alzheimer's disease neuroinflammation. Neuron (2019) (2019)](https://doi.org/10.1016/j.neuron.2019.09.001)
Pathway Diagram
The following diagram shows the key molecular relationships involving NCF1 — Neutrophil Cytosolic Factor 1 discovered through SciDEX knowledge graph analysis: