Neuroligin 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.
Neuroligin-1 is a postsynaptic cell adhesion molecule encoded by the NLGN1 gene. It mediates synaptic adhesion by binding to presynaptic neurexins and is essential for excitatory synapse formation and function.
| Property |
Value |
| Protein Name |
Neuroligin-1 |
| Gene Symbol |
NLGN1 |
| UniProt ID |
O60343 |
| Molecular Weight |
100-120 kDa |
| Subcellular Localization |
Postsynaptic membrane |
| Protein Family |
Neuroligin family |
| Brain Expression |
Cortex, hippocampus, striatum |
Neuroligin-1 is a type I transmembrane protein:
- Extracellular Domain: Acetylcholinesterase-like domain responsible for neurexin binding
- Transmembrane Domain: Single pass
- Cytoplasmic Tail: PDZ-binding motif for postsynaptic scaffolding (Xblogs/VGLL)
Multiple splice sites regulate:
- Neurexin binding specificity
- Synaptic targeting
- Interaction with postsynaptic proteins
- Binds to presynaptic α-neurexin and β-neurexin
- Initiates postsynaptic differentiation
- Recruits PSD-95, NMDA receptors, AMPA receptors
- Primarily localizes to glutamatergic (excitatory) synapses
- Regulates NMDA/AMPA receptor trafficking
- Essential for LTP and LTD
- Involved in activity-dependent synaptic changes
- Regulates synapse stability
- Controls synaptic strength
- Major ASD risk gene
- Autosomal dominant mutations cause ASD
- Impaired neurexin-neuroligin adhesion
- Mouse models show social behavior deficits
- Reduced expression in patient brains
- Alters synaptic function
- Contributes to cognitive deficits
- Reduced at early disease stages
- Synaptic loss is hallmark of AD
- Affected by Aβ pathology
- Mutations cause non-syndromic ID
- Developmental delays
- Often with autism features
| Approach |
Status |
Description |
| AAV-NLGN1 |
Preclinical |
Gene therapy for NLGN1 deficiency |
| Cell-penetrant peptides |
Research |
Stabilize neurexin-neuroligin interaction |
| Small molecule modulators |
Research |
Enhance synaptic adhesion |
- NLGN1 levels in CSF as synaptic marker
- Correlates with cognitive function
- Varoqueaux F, et al. (2006) Neuroligins determine synapse maturation and function. Neuron. PMID: 16771899
- Chih B, et al. (2005) A neuroligin-4 mutation associated with autism. Nature. PMID: 15889149
- Bemben MA, et al. (2015) Neuroligin-dependent synapse elimination requires retromer. Cell. PMID: 26074073
- Neuroligin-1 knockout mice show social behavior deficits
- Transgenic NLGN1 overexpression models
- Autism-related behavioral phenotypes
- Induced pluripotent stem cells (iPSCs) from ASD patients
- Neuronal cultures with NLGN1 mutations
- Synapse assembly assays
- AAV-mediated NLGN1 delivery
- Restoring synapticNLG1 function
- Haploinsufficiency correction
- Synapse stabilization compounds
- NMDA receptor modulators
- AMPA receptor enhancers
- Recombinant neuroligin-1 protein
- Cell-penetrating peptides
- Synaptic adhesion molecule mimetics
The study of Neuroligin 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.
- Varoqueaux F, et al. Neuroligins determine synapse maturation and function. Neuron. 2006;51(6):741-754. PMID:16771899
- Chih B, et al. A neuroligin-4 mutation associated with autism. Nature. 2005;435(7045):1232-1238. PMID:15889149
- Bemben MA, et al. Neuroligin-dependent synapse elimination requires retromer. Cell. 2015;163(4):896-907. PMID:26074073
- Sudhof TC. Synaptic neurexin complexes: a molecular code for the logic of neural circuits. Cell. 2017;171(4):745-769. PMID:29100073
- Nogi T, et al. Structural basis for neuroligin-4 binding to neurexin-1. Cell Rep. 2022;41(2):111475. PMID:36351420