| PRND Protein — Prion-Like Protein Doppel | |
|---|---|
| Protein Name | Prion-Like Protein Doppel (Dpl) |
| Gene | [PRND](/genes/prnd) |
| UniProt ID | Q9NSY5 |
| Molecular Weight | ~17 kDa (176 aa) |
| Subcellular Localization | Cell membrane (GPI-anchored) |
| Protein Family | Prion protein family |
| Expression | Testis, brain, heart, skeletal muscle |
Prnd Protein Prion Like Protein Doppel is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
PRND Protein (also known as Doppel or Dpl) is a prion protein family member encoded by the PRND gene on chromosome 20p13 [1]. The 176-amino acid GPI-anchored protein shares structural homology with the cellular prion protein (PrP^C) encoded by PRNP [2].
Doppel was discovered as an overexpressed protein in mice lacking the prion protein gene (Prnp^0/0), where it caused cerebellar ataxia and Purkinje cell degeneration [2]. This finding demonstrated the neurotoxic potential of the Doppel protein when misexpressed.
The Doppel protein contains:
Doppel shares structural features with PrP:
The normal function of Doppel is not fully understood:
PRND belongs to the prion protein gene family:
| Gene | Protein | Expression | Function |
|---|---|---|---|
| PRNP | PrP^C | Ubiquitous | Neuroprotection, synaptic function |
| PRND | Dpl | Testis > Brain | Less characterized |
| PRNT | - | Testis | Testis-specific |
| SPRN | Shadoo | Brain | Neuroprotection |
When overexpressed or misfolded, Doppel becomes neurotoxic:
While not a primary cause of human prion diseases:
The study of Prnd Protein Prion Like Protein Doppel 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.