Neurexin 1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Neurexin-1 is a presynaptic cell adhesion molecule encoded by the NRXN1 gene. It mediates synaptic adhesion by binding to postsynaptic neuroligins and is essential for synapse formation and function.
| Property |
Value |
| Protein Name |
Neurexin-1 |
| Gene Symbol |
NRXN1 |
| UniProt ID |
Q9UHB7 |
| Molecular Weight |
180-200 kDa (α), 150 kDa (β) |
| Subcellular Localization |
Presynaptic membrane |
| Protein Family |
Neurexin family |
| Brain Expression |
Cerebral cortex, hippocampus, cerebellum |
Neurexin-1 is one of the largest neuronal proteins with two major isoforms:
- Extracellular Domain: 6 LNS (Laminin A/neurexin/sex hormone-binding globulin) domains separated by EGF-like repeats
- Transmembrane Domain: Single pass
- Cytoplasmic Tail: PDZ-binding motif
- Extracellular Domain: Single LNS domain
- Shorter isoform of α-neurexin
Neurexin-1 has over 1000 splice variants generated by alternative splicing at 5 sites (SS#1-5), creating vast diversity in binding properties.
- Binds to postsynaptic neuroligins (NLGN1, NLGN2, NLGN3, NLGN4X)
- Binds to cerebellins (CBLN1, CBLN2, CBLN4)
- Binds to dystroglycan (DAG1)
- Induces presynaptic differentiation
- Recruits synaptic vesicles
- Forms active zones
- Essential for synaptic specificity
- Regulates neurotransmitter release
- Modulates NMDA/AMPA receptor function
- Involved in short-term plasticity
- Major ASD risk gene
- Heterozygous deletions cause ~0.5% of ASD cases
- Impairs synaptic connectivity
- Mouse models show social behavior deficits
- Copy number variations in patients
- Alters synaptic function
- Contributes to cognitive deficits
- Altered expression in AD brain
- Synaptic loss correlates with cognitive decline
- Mutations cause febrile seizures
- Developmental delays
| Approach |
Status |
Description |
| AAV-NRXN1 |
Preclinical |
Gene therapy for NRXN1 deficiency |
| Cell-penetrant peptides |
Research |
Stabilize neurexin-neuroligin interaction |
| Small molecules |
Research |
Modulate synaptic adhesion |
- Sudhof TC (2008) Neuroligins and neurexins link synaptic function to cognitive disease. Nature. PMID: 18828744
- Graf ER, et al. (2004) Neurexins induce differentiation of GABA and glutamate postsynaptic specializations. Cell. PMID: 15543130
- Bellen HJ, et al. (2010) The family of neurexin genes. Neuron. PMID: 20720501
The study of Neurexin 1 Protein 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.
- Sudhof TC. Neuroligins and neurexins link synaptic function to cognitive disease. Nature. 2008;455(7215):903-911. PMID:18828744
- Graf ER, et al. Neurexins induce differentiation of GABA and glutamate postsynaptic specializations via neuroligins. Cell. 2004;119(7):1013-1026. PMID:15543130
- Bellen HJ, et al. The family of neurexin genes: search for common ground. Neuron. 2010;67(6):956-960. PMID:20720501
- Craig AM, Kang Y. Neurexin-neuroligin synaptic adhesion. Nat Neurosci. 2007;10(11):1369-1379. PMID:17965655
- Arslan A, et al. Neurexin in neurological disorders. J Neurochem. 2023;164(5):673-688. PMID:36744931