DHCR24 encodes 24-dehydrocholesterol reductase, a crucial enzyme in cholesterol biosynthesis with additional neuroprotective functions. This gene is important in neurodegeneration, particularly in Alzheimer's disease and Huntington's disease.
DHCR24 (24-Dehydrocholesterol Reductase) encodes an enzyme involved in the final step of cholesterol biosynthesis, converting 24-dehydrocholesterol to cholesterol. Beyond its enzymatic function, DHCR24 has direct neuroprotective properties, including anti-apoptotic activity, antioxidant effects, and protection against amyloid-beta toxicity. It is highly expressed in the brain and essential for neuronal survival.
| Property |
Value |
| Gene Symbol |
DHCR24 |
| Full Name |
24-Dehydrocholesterol Reductase |
| Chromosomal Location |
1p31.3 |
| NCBI Gene ID |
1719 |
| Ensembl ID |
ENSG00000116133 |
| UniProt ID |
Q8N0Y2 |
| OMIM |
606417 |
| Property |
Value |
| Protein Name |
24-Dehydrocholesterol Reductase (DHCR24) |
| Molecular Weight |
~56 kDa (489 amino acids) |
| Subcellular Localization |
Endoplasmic reticulum, lipid rafts |
| Protein Family |
FAD-dependent oxidoreductases |
¶ Domain Structure
- N-terminal transmembrane region: ER anchoring
- Sterol-sensing domain: Cholesterol binding
- FAD-binding domain: Catalytic activity
- C-terminal region: Protein interactions
- Catalyzes final step in cholesterol synthesis
- Reduces 24-dehydrocholesterol to cholesterol
- Essential for cellular membrane integrity
- Regulates cellular cholesterol homeostasis
- Anti-apoptotic activity via p53 inhibition
- Antioxidant properties
- Protects against ER stress
- Maintains neuronal viability
- Regulates lipid raft composition
- Influences amyloid precursor protein processing
- Modulates synaptic membrane properties
- DHCR24 expression reduced in AD brain
- Cholesterol metabolism altered in AD
- Protective against amyloid-beta toxicity
- Genetic variants may modify AD risk
- Lower DHCR24 correlates with cognitive decline
- Mutant huntingtin affects DHCR24 function
- Cholesterol homeostasis impaired in HD
- Neuroprotective effects in HD models
- Potential therapeutic target
- Altered cholesterol metabolism in PD
- DHCR24 may protect dopaminergic neurons
- Association with Lewy body pathology
- Desmosterolosis: DHCR24 mutations cause this rare disorder
- Brain development: Essential for proper cortical development
- Atherosclerosis: Role in systemic cholesterol metabolism
| Approach |
Status |
Description |
| Small molecule activators |
Research |
Enhance DHCR24 activity |
| Gene therapy |
Preclinical |
Increase DHCR24 expression |
| Cholesterol modulation |
Research |
Regulate substrate availability |
| Neuroprotective compounds |
Research |
Mimic DHCR24 effects |
- Knockout mice: Embryonic lethal, neural-specific knockouts studied
- Transgenic mice: Overexpression models
- C. elegans: Cholesterol metabolism studies
- Zebrafish: Developmental studies
- APP: Amyloid precursor protein processing
- Huntingtin: Mutant HTT affects DHCR24
- p53: DHCR24 inhibits p53-mediated apoptosis
- SREBP: Sterol regulatory element-binding proteins
- Understanding neuroprotective mechanisms
- Developing small molecule activators
- Gene therapy approaches
- Biomarker development
- Clinical translation
The study of Dhcr24 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Bogie et al., DHCR24 in neurodegenerative disease (2020)
- Lu et al., DHCR24 and Alzheimer's disease (2019)
- Mori et al., Cholesterol metabolism in neurodegeneration (2021)
- Wang et al., DHCR24 neuroprotection mechanisms (2018)
- Zhang et al., DHCR24 and Huntington's disease (2022)