2-51027637-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001330078.2(NRXN1):c.637G>A(p.Gly213Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000451 in 1,597,094 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

NRXN1
NM_001330078.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 3.19

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.24623424).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NRXN1	NM_001330078.2 link	c.637G>A	p.Gly213Arg	missense_variant	Exon 2 of 23	ENST00000401669.7	NP_001317007.1	E7ERL8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NRXN1	ENST00000401669.7 link	c.637G>A	p.Gly213Arg	missense_variant	Exon 2 of 23	5	NM_001330078.2	ENSP00000385017.2		E7ERL8

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152182

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:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000602

AC:

AN:

216108

Hom.:

AF XY:

0.0000762

AC XY:

AN XY:

118060

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000137

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000436

AC:

AN:

1444912

Hom.:

Cov.:

AF XY:

0.0000474

AC XY:

AN XY:

717300

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000388

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000388

Gnomad4 NFE exome

AF:

0.0000534

Gnomad4 OTH exome

AF:

0.0000168

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152182

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74326

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ExAC

AF:

0.000108

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 29, 2016

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

Jul 17, 2018

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A variant of uncertain significance has been identified in the NRXN1 gene. The G213R variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The G213R variant is observed in 17/107626 (0.02%) alleles from individuals of European background (Lek et al., 2016). The G213R variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. However, in-silico analyses, including protein predictors and evolutionary conservation, support that this variant does not alter protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Pitt-Hopkins-like syndrome 2

Uncertain:1

Oct 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 213 of the NRXN1 protein (p.Gly213Arg). This variant is present in population databases (rs199561088, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with NRXN1-related conditions. ClinVar contains an entry for this variant (Variation ID: 206256). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Uncertain

0.068

BayesDel_noAF

Uncertain

0.11

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.039

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

Eigen

Benign

-0.12

Eigen_PC

Benign

-0.036

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.96

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

M_CAP

Benign

0.074

MetaRNN

Benign

0.25

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

MetaSVM

Benign

-0.57

MutationAssessor

Benign

0.34

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

PrimateAI

Uncertain

0.69

PROVEAN

Benign

0.14

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

REVEL

Benign

0.18

Sift

Benign

0.038

.;D;D;D;D;.;.;.;D;.;.

Sift4G

Benign

0.10

T;T;T;T;T;T;T;D;D;.;D

Polyphen

0.47, 0.97

.;P;D;.;.;.;.;.;.;.;.

Vest4

0.61

MutPred

0.41

Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);.;Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);Gain of solvent accessibility (P = 0.0789);

MVP

0.56

MPC

1.3

ClinPred

0.15

GERP RS

5.5

Varity_R

0.089

gMVP

0.62

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over