ANT1 Protein is a protein encoded by the SLC25A4 gene that ant1 catalyzes the exchange of mitochondrial atp for cytosolic adp:. This page describes its structure, normal nervous system function, role in neurodegenerative disease, and potential as a therapeutic target.
ANT1 (Adenine Nucleotide Translocase 1), encoded by SLC25A4, is a mitochondrial carrier protein that exchanges ADP and ATP across the inner mitochondrial membrane.
| Property |
Value |
| Gene |
SLC25A4 |
| UniProt |
P12235 |
| PDB |
1OKC, 6G2C |
| Molecular Weight |
~33 kDa |
| Subcellular Localization |
Mitochondrial inner membrane |
| Protein Family |
Mitochondrial carrier (SLC25) family |
ANT1 is a 326-amino acid protein with three tandem repeats, each containing a conserved motif. The protein forms a bundle of six transmembrane helices that create a pore across the mitochondrial inner membrane. The substrate binding site is located in the center of the pore.
ANT1 catalyzes the exchange of mitochondrial ATP for cytosolic ADP:
- Forward transport: Exports newly synthesized ATP from mitochondria to cytosol
- Reverse transport: Imports ADP from cytosol for ATP synthesis
- Required for oxidative phosphorylation: Essential for cellular energy production
- Regulates mitochondrial membrane potential: Maintains the proton gradient
¶ Mitochondrial Myopathy and Encephalomyopathy
- ANT1 mutations cause mitochondrial myopathy (MIM 103560)
- Symptoms include exercise intolerance, cardiomyopathy, and lactic acidosis
- Ragged-red fibers observed in muscle biopsies
- Reduced ANT1 activity in AD brains
- Impaired ATP export contributes to energy deficits
- Cytochrome c release may be facilitated by ANT1
- Mitochondrial permeability transition involves ANT1
- ANT1 dysfunction may contribute to mitochondrial complex I deficiency
- Altered mitochondrial ATP/ADP exchange in dopaminergic neurons
- May sensitize neurons to environmental toxins
- Altered mitochondrial energy metabolism in ALS
- ANT1 may be affected by mutant SOD1
- Reduced ATP production contributes to motor neuron vulnerability
- SLC25A38 mutations cause this disorder (MIM 205950)
- Coenzyme Q10: Improves mitochondrial function
- L-carnitine: Supports fatty acid oxidation and mitochondrial function
- Riboflavin: Supports mitochondrial metabolism
- Mitochondrial peptides: SS-31 (MitoQ) being studied