rs199557987

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_001330078.2(NRXN1):c.2507C>T(p.Ala836Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000334 in 1,607,870 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00018 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00035 ( 8 hom. )

Consequence

NRXN1
NM_001330078.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: 7.75

Publications

6 publications found

Variant links:

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)

NRXN1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011900961).

BP6

Variant 2-50497705-G-A is Benign according to our data. Variant chr2-50497705-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 194486.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000177 (27/152232) while in subpopulation SAS AF = 0.0056 (27/4820). AF 95% confidence interval is 0.00395. There are 1 homozygotes in GnomAd4. There are 20 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 8 AR,AD,Unknown gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NRXN1	NM_001330078.2 link	c.2507C>T	p.Ala836Val	missense_variant	Exon 14 of 23	ENST00000401669.7	NP_001317007.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NRXN1	ENST00000401669.7 link	c.2507C>T	p.Ala836Val	missense_variant	Exon 14 of 23	5	NM_001330078.2	ENSP00000385017.2

Frequencies

GnomAD3 genomes

AF:

0.000177

AC:

AN:

152114

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00560

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000780

AC:

191

AN:

244960

AF XY:

0.00110

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000900

Gnomad OTH exome

AF:

0.000510

GnomAD4 exome

AF:

0.000350

AC:

510

AN:

1455638

Hom.:

Cov.:

AF XY:

0.000520

AC XY:

376

AN XY:

723224

show subpopulations

African (AFR)

AF:

0.0000300

AC:

AN:

33306

American (AMR)

AF:

0.00

AC:

AN:

44244

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25866

East Asian (EAS)

AF:

0.00

AC:

AN:

39590

South Asian (SAS)

AF:

0.00560

AC:

479

AN:

85592

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53320

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5738

European-Non Finnish (NFE)

AF:

0.00000181

AC:

AN:

1107882

Other (OTH)

AF:

0.000449

AC:

AN:

60100

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

103

129

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000177

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41538

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00560

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.519

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000224

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.000770

AC:

Asia WGS

AF:

0.00289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Jun 23, 2015

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 30, 2015

Eurofins Ntd Llc (ga)

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Pitt-Hopkins-like syndrome 2

Benign:2

Jan 13, 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 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

Dec 12, 2018

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.A876V variant (also known as c.2627C>T), located in coding exon 14 of the NRXN1 gene, results from a C to T substitution at nucleotide position 2627. The alanine at codon 876 is replaced by valine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Benign:1

Oct 18, 2019

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Uncertain

-0.020

CADD

Pathogenic

(source)

DANN

Benign

0.67

DEOGEN2

Benign

0.22

.;T;.;.;T;.;.;T

Eigen

Uncertain

0.21

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

D;D;D;D;D;D;D;D

M_CAP

Benign

0.029

MetaRNN

Benign

0.012

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.36

MutationAssessor

Benign

1.7

.;L;.;.;.;.;.;.

PhyloP100

7.8

PrimateAI

Pathogenic

0.81

PROVEAN

Benign

-1.4

.;N;N;N;.;.;.;.

REVEL

Uncertain

0.40

Sift

Benign

0.58

.;T;T;T;.;.;.;.

Sift4G

Benign

0.38

T;T;T;T;T;T;T;T

Polyphen

0.032

.;.;B;.;.;.;.;.

Vest4

0.69

MutPred

0.58

.;Loss of disorder (P = 0.0607);.;Loss of disorder (P = 0.0607);.;.;.;.;

MVP

0.12

MPC

0.26

ClinPred

0.12

GERP RS

6.0

Varity_R

0.21

gMVP

0.58

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over