rs139694086

Positions:

chr7-146839902-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_014141.6(CNTNAP2):c.400T>G(p.Trp134Gly) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000254 in 1,614,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. 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. W134L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00026 ( 0 hom. )

Consequence

CNTNAP2
NM_014141.6 missense, splice_region

Scores

Splicing: ADA: 0.05399

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:8

Conservation

PhyloP100: 6.22

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 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.783

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CNTNAP2	NM_014141.6 linkuse as main transcript	c.400T>G	p.Trp134Gly	missense_variant, splice_region_variant	3/24	ENST00000361727.8
CNTNAP2	XM_017011950.3 linkuse as main transcript	c.400T>G	p.Trp134Gly	missense_variant, splice_region_variant	3/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CNTNAP2	ENST00000361727.8 linkuse as main transcript	c.400T>G	p.Trp134Gly	missense_variant, splice_region_variant	3/24	1	NM_014141.6	P1	Q9UHC6-1

Frequencies

GnomAD3 genomes

AF:

0.000197

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000323

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000159

AC:

AN:

251144

Hom.:

AF XY:

0.000199

AC XY:

AN XY:

135750

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000993

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000255

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000260

AC:

380

AN:

1461804

Hom.:

Cov.:

AF XY:

0.000276

AC XY:

201

AN XY:

727198

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00145

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

0.000283

Gnomad4 OTH exome

AF:

0.000298

GnomAD4 genome

AF:

0.000197

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

AN XY:

74348

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00173

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000323

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000332

Hom.:

Bravo

AF:

0.000219

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000157

AC:

EpiCase

AF:

0.000273

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Mar 15, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 10, 2024	Reported previously in the compound heterozygous state in a patient with multifocal epilepsy, moderate intellectual disability, autism spectrum disorder, ADHD, language impairment, and neuroimaging abnormalities; this patient also harbored variants in other genes (PMID: 37183190); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 37183190) -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Apr 12, 2023	PP3 -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 12, 2018	- -

Cortical dysplasia-focal epilepsy syndrome

Uncertain:3

Uncertain significance, criteria provided, single submitter	research	St. Anna Children's Cancer Research Institute (CCRI)	Feb 08, 2023	ACMG classification of pathogenicity variant 1: PM2, PP3 -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 07, 2024	This sequence change replaces tryptophan, which is neutral and slightly polar, with glycine, which is neutral and non-polar, at codon 134 of the CNTNAP2 protein (p.Trp134Gly). This variant is present in population databases (rs139694086, gnomAD 0.1%). This missense change has been observed in individual(s) with Pitt-Hopkins-like syndrome (PMID: 37183190). ClinVar contains an entry for this variant (Variation ID: 205321). 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 28, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 13, 2021

The c.400T>G (p.W134G) alteration is located in exon 3 (coding exon 3) of the CNTNAP2 gene. This alteration results from a T to G substitution at nucleotide position 400, causing the tryptophan (W) at amino acid position 134 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.40

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Pathogenic

0.41

CADD

Pathogenic

DANN

Benign

0.96

DEOGEN2

Uncertain

0.79

D;D

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.79

.;T

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.78

D;D

MetaSVM

Pathogenic

0.89

MutationAssessor

Benign

1.1

L;L

MutationTaster

Benign

0.97

PrimateAI

Pathogenic

0.86

PROVEAN

Pathogenic

-6.5

D;.

REVEL

Pathogenic

0.90

Sift

Benign

0.25

T;.

Sift4G

Benign

0.64

T;.

Polyphen

1.0

D;D

Vest4

0.84

MVP

0.93

MPC

0.58

ClinPred

0.29

GERP RS

5.7

Varity_R

0.79

gMVP

0.71

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.054

dbscSNV1_RF

Benign

0.29

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