SORL1 is a Sortilin-related receptor involved in amyloid precursor protein processing and lipid metabolism. Strong genetic risk factor for Alzheimer's disease.
Sorl1 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.
| Property |
Value |
| Gene Symbol |
SORL1 |
| Full Name |
Sortilin-Related Receptor 1 |
| Chr Location |
11q24.1 |
| NCBI Gene ID |
6653 |
| OMIM ID |
602215 |
| Ensembl ID |
ENSG00000137642 |
| UniProt ID |
Q9Y4X5 |
| Encoded Protein |
Sorterin |
| Associated Diseases |
Alzheimer's disease, early-onset familial AD |
SORL1 encodes sortilin-related receptor 1 (Sorterin), a neuronal sorting receptor that plays a critical role in regulating amyloid precursor protein (APP) trafficking and processing. This receptor is a key determinant of amyloid-beta (Aβ) production in the brain.
Key normal physiological functions include:
- APP trafficking - Directs APP to the retromer-mediated recycling pathway, away from amyloidogenic processing
- Retromer function - Interacts with the retromer complex to regulate endosomal sorting
- Cholesterol metabolism - Involved in lipid transport and homeostasis in neurons
- Neuronal viability - Protects against neuronal apoptosis through neurotrophic signaling
- Synaptic function - Regulates synaptic vesicle trafficking and neurotransmitter release
The protein contains multiple domains:
- VPS10P domain - Binds ligands including APP
- LDLR repeats - Low-density lipoprotein receptor repeats
- EGF domain - Epidermal growth factor-like repeats
- ** transmembrane domain** - Single pass membrane receptor
SORL1 is one of the strongest genetic risk factors for late-onset Alzheimer's disease:
- GWAS associations - Multiple SNPs in SORL1 associated with increased AD risk
- Expression changes - Reduced SORL1 expression leads to increased Aβ production
- Mechanism - Loss of SORL1 function causes APP to enter amyloidogenic processing pathways
- Interaction with APOE - SORL1 risk variants synergize with APOE ε4 allele
Rare variants in SORL1 can cause early-onset autosomal dominant Alzheimer's disease.
Sorterin is predominantly expressed in neurons:
- Highest expression: Hippocampus (CA regions), cortex (frontal, temporal), basal ganglia
- Moderate expression: Cerebellum, brainstem
- Cellular localization: Golgi apparatus, endosomes, plasma membrane
- Cell types: Primarily neurons, some expression in astrocytes
The Allen Brain Atlas shows high SORL1 expression in:
- Hippocampal pyramidal neurons
- Layer 2-4 cortical neurons
- Striatal medium spiny neurons
- Rogaeva et al., SORL1 variants and Alzheimer's disease (2007)
- Dekker et al., SORL1 in neuronal trafficking (2015)
- Cuenco et al., SORL1 genetic associations in AD (2008)
The study of Sorl1 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.
- Pulst et al., SCA2 identification (1996)
- Elden et al., ATXN2 expansions in ALS (2010)
- Bhattacharjee et ATXN2 in RNA metabolism (2011)
- Last et al., Ataxin-2 function and disease (2020)
- Sato et al., ATXN2 in Parkinson's disease (2019)
- Gispert-Sanchez et al., ATXN2 and RNA granules (2015)
- Nonis et al., ATXN2 in diabetes (2022)
- Kumar et al., ATXN2 therapeutic targeting (2021)