NRXN1 Protein
NRXN1 (Neurexin-1) encodes a polymorphic cell surface protein that functions as a critical synaptic adhesion molecule at presynaptic terminals. It mediates synaptic partner recognition and adhesion with postsynaptic neuroligins, playing a fundamental role in synapse formation, maintenance, and function. NRXN1 contains multiple protein domains including LNS domains, EGF-like repeats, and PDZ-binding motifs that facilitate diverse protein-protein interactions. Heterozygous deletions and mutations in NRXN1 are associated with autism spectrum disorder, intellectual disability, and schizophrenia, highlighting its essential role in normal neurodevelopment. Research into NRXN1 dysfunction may provide insights into synaptic mechanisms underlying neurodegenerative processes.
Neurexin-1 is a polymorphic cell surface protein that functions as a synaptic adhesion molecule. It contains an extracellular domain with multiple LNS (Laminin/Neurexin/Sex hormone-binding globulin) domains and EGF-like repeats, a transmembrane region, and a cytoplasmic tail with PDZ-binding motifs. As a presynaptic protein, NRXN1 mediates recognition and adhesion with postsynaptic neuroligins.
Neurexin-1 is a polymorphic cell surface protein that functions as a synaptic adhesion molecule. It contains an extracellular domain with multiple LNS (Laminin/Neurexin/Sex hormone-binding globulin) domains and EGF-like repeats, a transmembrane region, and a cytoplasmic tail with PDZ-binding motifs. As a presynaptic protein, NRXN1 mediates recognition and adhesion with postsynaptic neuroligins.
NRXN1 haploinsufficiency leads to defective synapse formation and function, contributing to neurodevelopmental disorders. Altered neurexin-neuroligin interactions are implicated in the synaptic pathology of neurodegenerative diseases.
Current approaches focus on developing small molecules that can stabilize or enhance neurexin-neuroligin interactions. Gene therapy approaches to restore NRXN1 expression are under investigation.