rs774717843

Positions:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The ENST00000361727.8(CNTNAP2):c.1385G>A(p.Arg462His) variant causes a missense change. The variant allele was found at a frequency of 0.000119 in 1,613,952 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. 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. R462C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

CNTNAP2
ENST00000361727.8 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3O:1

Conservation

PhyloP100: 6.03

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.053080738).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CNTNAP2	NM_014141.6 linkuse as main transcript	c.1385G>A	p.Arg462His	missense_variant	9/24	ENST00000361727.8	NP_054860.1
CNTNAP2	XM_017011950.3 linkuse as main transcript	c.1385G>A	p.Arg462His	missense_variant	9/14		XP_016867439.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CNTNAP2	ENST00000361727.8 linkuse as main transcript	c.1385G>A	p.Arg462His	missense_variant	9/24	1	NM_014141.6	ENSP00000354778	P1	Q9UHC6-1

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152114

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00145

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000187

AC:

AN:

251260

Hom.:

AF XY:

0.000280

AC XY:

AN XY:

135788

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.00127

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000123

AC:

180

AN:

1461720

Hom.:

Cov.:

AF XY:

0.000172

AC XY:

125

AN XY:

727156

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00157

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000306

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74430

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00145

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.000272

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Cortical dysplasia-focal epilepsy syndrome

Uncertain:1Other:1

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 31, 2022	This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 462 of the CNTNAP2 protein (p.Arg462His). This variant is present in population databases (rs774717843, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with CNTNAP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 205243). 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. -
not provided, no classification provided	phenotyping only	GenomeConnect, ClinGen	-	Variant interpretted as Uncertain significance and reported on 01-18-2019 by Lab or GTR ID 500031. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 03, 2019

The p.R462H variant (also known as c.1385G>A), located in coding exon 9 of the CNTNAP2 gene, results from a G to A substitution at nucleotide position 1385. The arginine at codon 462 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species; however, histidine is the reference amino acid in other 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

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Nov 05, 2012

p.Arg462His (CGC>CAC):c.1385 G>A in exon 9 of the CNTNAP2 gene (NM_014141.4). The Arg462His missense change has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. The NHLBI ESP Exome Variant Project has not identified Arg426His in approximately 6,500 individuals of European or African American ethnicity, indicating that it is not a common benign variant in these populations. Arg462His alters a highly conserved position in the second laminin G-like domain of the protein. However, missense mutations have not been reported in this region of the protein. Additionally, this amino acid substitution is conservative, as Arginine and Histidine are both positively charged amino acids. Multiple in silico algorithms predict Arg462His may be benign. Therefore, based on the currently available information, it is unclear whether Arg462His is a disease-causing mutation or a rare benign variant. The variant is found in INFANT-EPI panel(s). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.15

T;T

Eigen

Benign

-0.0067

Eigen_PC

Benign

0.19

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.82

.;T

M_CAP

Benign

0.015

MetaRNN

Benign

0.053

T;T

MetaSVM

Benign

-0.68

MutationAssessor

Benign

0.77

N;N

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.62

PROVEAN

Benign

0.31

N;.

REVEL

Uncertain

0.30

Sift

Benign

0.10

T;.

Sift4G

Benign

0.073

T;.

Polyphen

0.019

B;B

Vest4

0.38

MutPred

0.66

Gain of catalytic residue at L464 (P = 0.1011);Gain of catalytic residue at L464 (P = 0.1011);

MVP

0.82

MPC

0.13

ClinPred

0.085

GERP RS

6.0

Varity_R

0.20

gMVP

0.49

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