background:
Neurexins function in the vertebrate nervous system as cell adhesion molecules and receptors. Two neurexin genes are among the largest known in human (NRXN1 and NRXN3). By using alternate promoters, splice sites and exons, predictions of hundreds or even thousands of distinct mRNAs have been made. Most transcripts use the upstream promoter and encode alpha-neurexin isoforms; fewer transcripts are produced from the downstream promoter and encode beta-neurexin isoforms. Alpha-neurexins contain epidermal growth factor-like (EGF-like) sequences and laminin G domains, and they interact with neurexophilins. Beta-neurexins lack EGF-like sequences and contain fewer laminin G domains than alpha-neurexins.
Function:
Neuronal cell surface protein that may be involved in cell recognition and cell adhesion by forming intracellular junctions through binding to neuroligins. May play a role in formation or maintenance of synaptic junctions. May mediate intracellular signaling. May play a role in angiogenesis
Subunit:
The cytoplasmic SLCterminal region binds to CASK. Isoforms Beta 4b bind neuroligins NLGN1, NLGN2 and NLGN3, alpha-dystroglycan and alpha-latrotoxin. Binding to neuroligins is calcium-dependent, and the binding preference ranks as follow: NLGN1 > NLGN4 >> NLGN3 > NLGN2
Subcellular Location:
Membrane; Single pass type I membrane protein
Post-translational modifications:
Highly O-glycosylated and minor N-glycosylated
Similarity:
Belongs to the neurexin family.
Contains 1 laminin G-like domain.
Database links:
UniProtKB/Swiss-Prot: P51680.2
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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