Tbio Q9ULB1 Neurexin-1

Protein Summary

Description

Cell surface protein involved in cell-cell-interactions, exocytosis of secretory granules and regulation of signal transmission. Function is isoform-specific. Alpha-type isoforms have a long N-terminus with six laminin G-like domains and play an important role in synaptic signal transmission. Alpha-type isoforms play a role in the regulation of calcium channel activity and Ca(2+)-triggered neurotransmitter release at synapses and at neuromuscular junctions. They play an important role in Ca(2+)-triggered exocytosis of secretory granules in pituitary gland. They may effect their functions at synapses and in endocrine cells via their interactions with proteins from the exocytotic machinery. Likewise, alpha-type isoforms play a role in regulating the activity of postsynaptic NMDA receptors, a subtype of glutamate-gated ion channels. Both alpha-type and beta-type isoforms may play a role in the formation or maintenance of synaptic junctions via their calcium-dependent interactions (via the extracellular domains) with neuroligin family members, CBLN1 or CBLN2. In vitro, triggers the de novo formation of presynaptic structures. May be involved in specification of excitatory synapses. Alpha-type isoforms were first identified as receptors for alpha-latrotoxin from spider venom (By similarity). This gene encodes a single-pass type I membrane protein that belongs to the neurexin family. Neurexins are cell-surface receptors that bind neuroligins to form Ca(2+)-dependent neurexin/neuroligin complexes at synapses in the central nervous system. This complex is required for efficient neurotransmission and is involved in the formation of synaptic contacts. Three members of this gene family have been studied in detail and are estimated to generate over 3,000 variants through the use of two alternative promoters (alpha and beta) and extensive alternative splicing in each family member. Recently, a third promoter (gamma) was identified for this gene in the 3' region. Mutations in this gene are associated with Pitt-Hopkins-like syndrome-2 and may contribute to susceptibility to schizophrenia. [provided by RefSeq, Aug 2016]

Uniprot Accession IDs

• Q9ULB1
• A7KRL9
• O60323
• Q53TJ9
• Q53TQ1
• Q5HYI0
• Q9C079
• Q9C080
• Q9C081
• Q9H3M2
• Q9UDM6

Gene Name

• NRXN1

Ensembl ID

• ENST00000404971
• ENSP00000385142
• ENSG00000179915
• ENST00000406316
• ENSP00000384311
• ENST00000625672
• ENSP00000485887

Symbol

• KIAA0578
• PTHSL2
• SCZD17
• Hs.22998

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
biological process	0
biological term	0
cell line	0
cell type or tissue	0
cellular component	0

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 378.13   (req: < 5)

Gene RIFs: 99   (req: <= 3)

Antibodies: 248   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 378.13   (req: >= 5)

Gene RIFs: 99   (req: > 3)

Antibodies: 248   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 32

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligand: 0

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0