Cyp27B1 — Vitamin D 1 Alpha Hydroxylase is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Cytochrome P450 27B1 | |
|---|---|
| Gene Symbol | CYP27B1 |
| Full Name | Cytochrome P450 Family 27 Subfamily B Member 1 |
| Chromosome | 12q14.1 |
| NCBI Gene ID | 1594 |
| OMIM | 171080 |
| Ensembl ID | ENSG00000128604 |
| UniProt ID | Q9H3J8 |
| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Multiple Sclerosis, Vitamin D-Dependent Rickets Type 1 |
This section provides a summary of the gene/protein's function, expression, and relevance to neurodegenerative diseases.
CYP27B1 encodes 25-hydroxyvitamin D3 1-alpha-hydroxylase, a mitochondrial cytochrome P450 enzyme that catalyzes the conversion of 25-hydroxyvitamin D3 (calcidiol) to the active form 1,25-dihydroxyvitamin D3 (calcitriol). This is the rate-limiting step in vitamin D hormone biosynthesis. Calcitriol acts as a ligand for the vitamin D receptor (VDR), regulating gene expression involved in calcium homeostasis, immune function, and cell proliferation. In the brain, vitamin D has neuroprotective effects including modulation of neurotrophic factors, calcium homeostasis, and anti-inflammatory actions.
Highest expression in kidney proximal tubules. Also expressed in brain, particularly in hippocampus, cortex, and substantia nigra. Expression is upregulated by parathyroid hormone (PTH) and downregulated by fibroblast growth factor 23 (FGF23) and calcitriol.
| Disease | Variants | Inheritance | Mechanism |
|---|---|---|---|
| Vitamin D-Dependent Rickets Type 1 | Loss-of-function | Autosomal recessive | Impaired vitamin D activation |
| Multiple Sclerosis | Various | Risk factor | Vitamin D deficiency, immune modulation |
| Alzheimer's Disease | Various | Risk factor | Neuroprotective vitamin deficiency |
| Parkinson's Disease | Various | Risk factor | Dopaminergic neuroprotection |
The study of Cyp27B1 — Vitamin D 1 Alpha Hydroxylase 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.