rs201802152

Variant names:

• chr2-50621200-T-A
• rs201802152
• NM_001330078.2:c.1158+26A>T

Your query was ambiguous. Multiple possible variants found:

• chr2-50621200-T-A
• chr2-50621200-T-C
• chr2-50621200-T-G

Variant summary

Our verdict is Benign. Variant got -11 ACMG points: 0P and 11B. BP4_Moderate BP6 BS1 BS2

The NM_001135659.3(NRXN1):​c.1278+5A>T variant causes a splice region, intron change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000915 in 1,554,320 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00074 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00093 (4 hom.)
• Consequence: NRXN1 NM_001135659.3 splice_region, intron
• Scores: Splicing: ADA: 0.001757
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:10
• Conservation: PhyloP100: 8.01

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]

ENSG00000283058 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.42).
• BP6: Variant 2-50621200-T-A is Benign according to our data. Variant chr2-50621200-T-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 129818.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Benign=1, Likely_benign=5}. Variant chr2-50621200-T-A is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000736 (112/152216) while in subpopulation SAS AF= 0.0029 (14/4828). AF 95% confidence interval is 0.00175. There are 0 homozygotes in gnomad4. There are 66 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 4 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NRXN1	NM_001330078.2	c.1158+26A>T		intron_variant	Intron 7 of 22	ENST00000401669.7	NP_001317007.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NRXN1	ENST00000401669.7	c.1158+26A>T		intron_variant	Intron 7 of 22	5	NM_001330078.2	ENSP00000385017.2

Frequencies

GnomAD3 genomes AF: 0.000736 AC: 112 AN: 152098 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00290

Gnomad FIN AF: 0.00207

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000970

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.00112 AC: 195 AN: 173744 Hom.: 0 AF XY: 0.00137 AC XY: 125 AN XY: 91416

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000276

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00367

Gnomad FIN exome AF: 0.00129

Gnomad NFE exome AF: 0.00108

Gnomad OTH exome AF: 0.000854

GnomAD4 exome AF: 0.000934 AC: 1310 AN: 1402104 Hom.: 4 Cov.: 28 AF XY: 0.00106 AC XY: 731 AN XY: 692540

Gnomad4 AFR exome AF: 0.0000625

Gnomad4 AMR exome AF: 0.000275

Gnomad4 ASJ exome AF: 0.0000399

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00423

Gnomad4 FIN exome AF: 0.00131

Gnomad4 NFE exome AF: 0.000756

Gnomad4 OTH exome AF: 0.00105

GnomAD4 genome AF: 0.000736 AC: 112 AN: 152216 Hom.: 0 Cov.: 32 AF XY: 0.000887 AC XY: 66 AN XY: 74428

Gnomad4 AFR AF: 0.000120

Gnomad4 AMR AF: 0.000262

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00290

Gnomad4 FIN AF: 0.00207

Gnomad4 NFE AF: 0.000970

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000751 Hom.: 0

Bravo AF: 0.000616

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:10

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Benign:6

-

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Dec 28, 2018

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 04, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Has not been previously published as pathogenic or benign to our knowledge -

-

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jun 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

NRXN1: BP4, BS1 -

Oct 11, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Pitt-Hopkins-like syndrome 2 Uncertain:1 Benign:2

Aug 05, 2021

Pittsburgh Clinical Genomics Laboratory, University of Pittsburgh Medical Center

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence variant is a single nucleotide substitution (A>T) 5 base pairs downstream of exon 8 of NRXN1. This is a previously reported variant (ClinVar) that has been reported under a different transcript as c.1158+26A>T. To our knowledge, this variant has not been previously reported in individuals with NRXN1-related disease in the literature and is present in control population datasets (gnomAD database 207/205140 alleles or 0.1%). Bioinformatic tools do not predict a significant effect on splicing; however, this residue is well conserved among the vertebrate species examined. Splicing studies confirming an effect of this variant have not been performed, to our knowledge. At this time, there is insufficient evidence to determine if this variant is pathogenic or benign. Therefore, we consider this a variant of uncertain significance. ACMG Criteria: BP4 -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases Uncertain:1

Nov 23, 2020

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1278+5A>T intronic alteration consists of an A to T substitution 5 nucleotides after exon 8 (coding exon 7) in the NRXN1 gene. Based on data from the Genome Aggregation Database (gnomAD) database, the NRXN1 c.1278+5A>T alteration was observed in 0.1% (207/205140) of total alleles studied, with a frequency of 0.37% (84/22894) in the South Asian subpopulation. In silico splice site analysis predicts that this alteration will not have any significant effect on splicing. Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Intellectual disability Uncertain:1

Jan 01, 2019

Centre de Biologie Pathologie Génétique, Centre Hospitalier Universitaire de Lille

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not specified Benign:1

Sep 12, 2018

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

NRXN1-related disorder Benign:1

Apr 07, 2021

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.42
CADD	Benign	22
DANN	Benign	0.90

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0018
dbscSNV1_RF	Benign	0.14
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

Publications

LitVar

Other links and lift over

dbSNP: rs201802152; hg19: chr2-50848338;