NM_001330078.2:c.4352C>G

Variant names:

• chr2-49922116-G-C
• rs1060503175
• NM_001330078.2:c.4352C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001330078.2(NRXN1):​c.4352C>G​(p.Ala1451Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1451V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NRXN1 NM_001330078.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

NRXN1 (HGNC:8008): (neurexin 1) 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]

NRXN1 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• chromosome 2p16.3 deletion syndrome

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Pitt-Hopkins-like syndrome 2

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• autism

  Inheritance: AD Classification: MODERATE Submitted by: G2P
• schizophrenia

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001330078.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NRXN1	NM_001330078.2	MANE Select	c.4352C>G	p.Ala1451Gly	missense	Exon 23 of 23	NP_001317007.1
	NRXN1	NM_001135659.3		c.4472C>G	p.Ala1491Gly	missense	Exon 24 of 24	NP_001129131.1
	NRXN1	NM_001330093.2		c.4349C>G	p.Ala1450Gly	missense	Exon 23 of 23	NP_001317022.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NRXN1	ENST00000401669.7	TSL:5 MANE Select	c.4352C>G	p.Ala1451Gly	missense	Exon 23 of 23	ENSP00000385017.2
	NRXN1	ENST00000404971.5	TSL:1	c.4472C>G	p.Ala1491Gly	missense	Exon 24 of 24	ENSP00000385142.1
	NRXN1	ENST00000625672.2	TSL:1	c.4319C>G	p.Ala1440Gly	missense	Exon 21 of 21	ENSP00000485887.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Sep 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

NRXN1: PM2

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.20	T
Eigen	Uncertain	0.63
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Benign	0.070	D
MetaRNN	Uncertain	0.61	D
MetaSVM	Benign	-0.31	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		10
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-2.6	D
REVEL	Uncertain	0.43
Sift	Uncertain	0.0050	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.79
MutPred		0.27		Loss of helix (P = 0.0558)
MVP		0.76
MPC		1.8
ClinPred		0.98	D
GERP RS		5.4
Varity_R		0.39
gMVP		0.94
Mutation Taster		=24/76	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1060503175; hg19: chr2-50149254;