Qdpr Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Symbol | QDPR |
|---|---|
| Full Name | Quinoid Dihydropteridine Reductase |
| Chromosomal Location | Chromosome 4p15.31 |
| NCBI Gene ID | 5876 |
| OMIM | 603786 |
| Ensembl ID | ENSG00000151653 |
| UniProt ID | P09455 |
| Aliases | DHPR, QDPRH, HDCR |
| Protein | QDPR Protein |
QDPR (Quinoid Dihydropteridine Reductase) is an essential enzyme in the tetrahydrobiopterin (BH4) biosynthesis pathway. BH4 serves as a critical cofactor for phenylalanine hydroxylase (PAH), tyrosine hydroxylase (TH), and tryptophan hydroxylase (TPH)—enzymes responsible for the rate-limiting steps in the synthesis of neurotransmitters dopamine, serotonin, and norepinephrine[1].
QDPR deficiency, also known as dihydropteridine reductase (DHPR) deficiency, is a rare autosomal recessive disorder that leads to impaired BH4 recycling and causes severe neurological symptoms. Beyond its role in BH4 metabolism, QDPR has been implicated in various neurodegenerative processes[2][3].
QDPR catalyzes the reduction of quinonoid dihydrobiopterin (qBH2) to tetrahydrobiopterin (BH4) using NADH as an electron donor:
This reaction is essential for recycling BH4, which is constantly oxidized during phenylalanine, tyrosine, and tryptophan hydroxylation.
QDPR supports the function of three key enzymes:
QDPR is expressed in:
This autosomal recessive disorder causes:
QDPR has been implicated in PD through its role in BH4 metabolism:
The study of Qdpr 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.
Thony B, et al. (1998). "Tetrahydrobiopterin-deficient mouse model for PKU and BH4 deficiency." Nature Genetics. ↩︎ ↩︎
Blau N, et al. (2020). "Tetrahydrobiopterin deficiency: from phenotype to genotype." Human Molecular Genetics. ↩︎ ↩︎
Kittelberger K, et al. (2019). "Dihydropteridine reductase activity in Parkinson's disease brain." Journal of Neural Transmission. ↩︎