7-147132266-G-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_014141.6(CNTNAP2):c.1105G>T(p.Val369Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000471 in 1,613,554 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000048 ( 0 hom. )

Consequence

CNTNAP2
NM_014141.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 6.41

Variant links:

Genes affected

CNTNAP2 (HGNC:13830): (contactin associated protein 2) This gene encodes a member of the neurexin family which functions in the vertebrate nervous system as cell adhesion molecules and receptors. This protein, like other neurexin proteins, contains epidermal growth factor repeats and laminin G domains. In addition, it includes an F5/8 type C domain, discoidin/neuropilin- and fibrinogen-like domains, thrombospondin N-terminal-like domains and a putative PDZ binding site. This protein is localized at the juxtaparanodes of myelinated axons, and mediates interactions between neurons and glia during nervous system development and is also involved in localization of potassium channels within differentiating axons. This gene encompasses almost 1.5% of chromosome 7 and is one of the largest genes in the human genome. It is directly bound and regulated by forkhead box protein P2, a transcription factor related to speech and language development. This gene has been implicated in multiple neurodevelopmental disorders, including Gilles de la Tourette syndrome, schizophrenia, epilepsy, autism, ADHD and intellectual disability. [provided by RefSeq, Jul 2017]

CNTNAP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.21657813).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNTNAP2	NM_014141.6 link	c.1105G>T	p.Val369Leu	missense_variant	Exon 8 of 24	ENST00000361727.8	NP_054860.1	Q9UHC6-1A0A090N7T7B2RCH4
CNTNAP2	XM_017011950.3 link	c.1105G>T	p.Val369Leu	missense_variant	Exon 8 of 14		XP_016867439.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNTNAP2	ENST00000361727.8 link	c.1105G>T	p.Val369Leu	missense_variant	Exon 8 of 24	1	NM_014141.6	ENSP00000354778.3		Q9UHC6-1

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152054

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000796

AC:

AN:

251326

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135836

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:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000479

AC:

AN:

1461500

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

727066

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000630

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152054

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74270

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:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000565

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cortical dysplasia-focal epilepsy syndrome

Uncertain:2

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Aug 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 369 of the CNTNAP2 protein (p.Val369Leu). This variant is present in population databases (rs368057493, gnomAD 0.002%). This missense change has been observed in individual(s) with speech impairment (PMID: 28440294). ClinVar contains an entry for this variant (Variation ID: 420390). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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. -

Inborn genetic diseases

Uncertain:1

Aug 19, 2016

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.V369L variant (also known as c.1105G>T), located in coding exon 8 of the CNTNAP2 gene, results from a G to T substitution at nucleotide position 1105. The valine at codon 369 is replaced by leucine, an amino acid with highly similar properties. This alteration was detected in an individual with significant language impairment (SLI) and normal nonverbal cognition. Of note, this individual also carried the c.701T>C alteration in the ROBO1 gene; the phase of these two alterations was not determined (Chen, et al. bioRxiv 2016 June) This variant was previously reported in the SNPDatabase as rs368057493. Based on data from the NHLBI Exome Sequencing Project (ESP), the T allele has an overall frequency of approximately 0.01% (1/13006) total alleles studied and 0.01% (1/8600) European American alleles. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Nov 16, 2017

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A variant of uncertain significance has been identified in the CNTNAP2 gene. The V369L variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. This variant isobserved in 3/126596 (0.002%) alleles from individuals of European background, in large population cohorts (Lek et al., 2016). The V369L variant is a conservative amino acid substitution, which is not likely to impact secondaryprotein structure as these residues share similar properties. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.0034

BayesDel_noAF

Benign

-0.23

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.078

T;T

Eigen

Benign

-0.0091

Eigen_PC

Benign

0.22

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.74

.;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.22

T;T

MetaSVM

Benign

-0.73

MutationAssessor

Benign

1.1

L;L

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-0.42

N;.

REVEL

Benign

0.27

Sift

Benign

0.20

T;.

Sift4G

Benign

0.22

T;.

Polyphen

0.0

B;B

Vest4

0.55

MutPred

0.52

Loss of phosphorylation at T373 (P = 0.189);Loss of phosphorylation at T373 (P = 0.189);

MVP

0.76

MPC

0.095

ClinPred

0.56

GERP RS

5.7

Varity_R

0.16

gMVP

0.43

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

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