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Details on Person UniProt:Q63372 Nrxn1

Class:IdReferenceGeneProduct:96818
_chainChangeLogsignal peptide:1-30 added on Sat February 7 2015;chain:31-1530 added on Sat February 7 2015
_displayNameUniProt:Q63372 Nrxn1
_timestamp2026-02-20 23:08:35
chainsignal peptide:1-30
chain:31-1530
checksum548109BAF05119FC
commentFUNCTION Cell surface protein involved in cell-cell-interactions, exocytosis of secretory granules and regulation of signal transmission (By similarity). Function is isoform-specific (By similarity). Alpha-type isoforms have a long N-terminus with six laminin G-like domains and play an important role in synaptic signal transmission (By similarity). 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 (By similarity). They play an important role in Ca(2+)-triggered exocytosis of secretory granules in pituitary gland (By similarity). They may affect their functions at synapses and in endocrine cells via their interactions with proteins from the exocytotic machinery (By similarity). Likewise, alpha-type isoforms play a role in regulating the activity of postsynaptic NMDA receptors, a subtype of glutamate-gated ion channels (By similarity). Both alpha-type and beta-type isoforms may play a role in the formation or maintenance of synaptic junctions via their interactions (via the extracellular domains) with neuroligin family members, CBLN1 or CBLN2 (By similarity). In vitro, triggers the de novo formation of presynaptic structures (PubMed:20064387, PubMed:20064388). May be involved in specification of excitatory synapses (PubMed:20064387, PubMed:20064388). Alpha-type isoforms were first identified as receptors for alpha-latrotoxin from spider venom (PubMed:20064387, PubMed:20064388).SUBUNIT Interacts (via laminin G-like domain 2 and/or laminin G-like domain 6) with NLGN1 forming a heterotetramer, where one NLGN1 dimer interacts with one NRXN1 dimer (By similarity). Also interacts (via laminin G-like domain 2 and/or laminin G-like domain 6) with NLGN2, NLGN3 and NLGN4L; interactions with NLGN1, NLGN2, NLGN3 and NLGN4L are calcium-dependent (PubMed:18093522). Interacts (via cytoplasmic C-terminal region) with CASK (via the PDZ, SH3 and guanylate kinase-like domains) (PubMed:12040031, PubMed:8786425). Interacts (via cytoplasmic C-terminus) with CASKIN1 and APBA1 (PubMed:12040031). Interacts (via laminin G-like domain 2) with NXPH1 and NXPH3 (PubMed:9856994). Alpha-type isoforms (neurexin-1-alpha) interact (via laminin G-like domain 2 and/or laminin G-like domain 6) with DAG1 (via alpha-dystroglycan chain) (PubMed:11470830). Interacts with LRRTM1, LRRTM2, LRRTM3 and LRRTM4 (PubMed:20064387, PubMed:20064388). Interacts with SYT13 and SYTL1 (By similarity). Interacts with CBLN1, CBLN2 and, less avidly, with CBLN4 (By similarity). Interacts with CLSTN3 (By similarity). Alpha-type isoforms interact with alpha-latrotoxin from spider venom (PubMed:10197529, PubMed:1621094).INTERACTION Two isoform types, alpha-type and beta-type are produced by alternative promoter usage. In addition there are at least five alternatively spliced sites, each of which may be spliced in up to seven different ways. Combinatorial splicing at each of these five sites may lead to the generation of at least 96 isoforms but for simplicity only individual splice events or observed combinations are explicitly described below. Beta-type isoforms share the possibility of alternative splicing at sites 4 and 5. Experimental confirmation may be lacking for some isoforms.TISSUE SPECIFICITY Brain (neuronal synapse).PTM O-glycosylated; contains heparan sulfate. Heparan sulfate attachment is required for synapse development by mediating interactions with neuroligins and LRRTM2.MISCELLANEOUS Alpha-latrotoxin competes with alpha-dystroglycan for binding.SIMILARITY Belongs to the neurexin family.
descriptionrecommendedName: Neurexin-1 alternativeName: Neurexin I-alpha alternativeName: Neurexin-1-alpha
geneNameNrxn1
identifierQ63372
isSequenceChangedFALSE
keyword3D-structure
Alternative promoter usage
Alternative splicing
Calcium
Cell adhesion
Cell membrane
Cell projection
Direct protein sequencing
Disulfide bond
EGF-like domain
Glycoprotein
Heparan sulfate
Membrane
Metal-binding
Proteoglycan
Reference proteome
Repeat
Signal
Synapse
Transmembrane
Transmembrane helix
modified[InstanceEdit:143527] Schmidt, EE, 2004-11-12 07:45:10
[InstanceEdit:217385] Schmidt, EE, 2008-03-27 06:23:53
[InstanceEdit:354386] Schmidt, EE, 2008-06-18 04:45:12
[InstanceEdit:384350] Kanapin, AA, 2008-11-26 14:00:39
[InstanceEdit:392885] Kanapin, AA, 2009-03-09 12:07:18
[InstanceEdit:400710] Schmidt, EE, 2009-03-25 05:33:35
[InstanceEdit:423310] Kanapin, AA
[InstanceEdit:435478] Kanapin, AA
[InstanceEdit:435871] Kanapin, AA
[InstanceEdit:447347] Kanapin, AA
[InstanceEdit:525883] Kanapin, AA
[InstanceEdit:613449] Kanapin, AA
[InstanceEdit:797602] Kanapin, AA
[InstanceEdit:937368] Yung, CK
[InstanceEdit:1042053] Yung, CK
[InstanceEdit:1220657] Yung, CK
[InstanceEdit:1300696] Yung, CK
[InstanceEdit:1301627] Yung, CK
[InstanceEdit:1551960] Weiser, JD
[InstanceEdit:1995863] Weiser, JD
[InstanceEdit:2132304] Weiser, JD
[InstanceEdit:2265580] Weiser, JD
[InstanceEdit:2455454] Weiser, JD
[InstanceEdit:3445779] Weiser, JD
[InstanceEdit:5433710] Weiser, JD
[InstanceEdit:5618415] Weiser, JD
[InstanceEdit:5634237] Weiser, JD
[InstanceEdit:5673015] Weiser, JD
[InstanceEdit:9037114] Weiser, JD
[InstanceEdit:9637257] Weiser, JD
[InstanceEdit:9657908] Weiser, JD
[InstanceEdit:9666080] Weiser, JD
[InstanceEdit:9676415] Weiser, JD
[InstanceEdit:9796772] Weiser, Joel
[InstanceEdit:9834092] Weiser, Joel
[InstanceEdit:9852000] Weiser, Joel, 2023-11-03
[InstanceEdit:9917590] Weiser, Joel, 2024-08-09
[InstanceEdit:9983091] Weiser, Joel, 2026-02-20
nameNrxn1
referenceDatabase[ReferenceDatabase:2] UniProt
secondaryIdentifierNRX1A_RAT
sequenceLength1530
species[Species:48895] Rattus norvegicus
(isoformParent)[ReferenceIsoform:151447] UniProt:Q63373-2 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:151448] UniProt:Q63373-3 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:151449] UniProt:Q63373-4 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240235] UniProt:Q63372-2 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240236] UniProt:Q63372-3 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240237] UniProt:Q63372-4 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240238] UniProt:Q63372-5 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240239] UniProt:Q63372-6 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240240] UniProt:Q63372-7 Nrxn1 [Rattus norvegicus]
[ReferenceIsoform:240241] UniProt:Q63372-8 Nrxn1 [Rattus norvegicus]
List all 17 refering instances
(referenceEntity)[EntityWithAccessionedSequence:2426602] Nrxn1 [plasma membrane] [Rattus norvegicus]
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No pathways have been reviewed or authored by UniProt:Q63372 Nrxn1 (96818)