rs200098924

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_005076.5(CNTN2):c.1295G>A(p.Arg432His) variant causes a missense change. The variant allele was found at a frequency of 0.000196 in 1,609,554 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R432C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 0 hom. )

Consequence

CNTN2
NM_005076.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.53

Variant links:

Genes affected

CNTN2 (HGNC:2172): (contactin 2) This gene encodes a member of the contactin family of proteins, part of the immunoglobulin superfamily of cell adhesion molecules. The encoded glycosylphosphatidylinositol (GPI)-anchored neuronal membrane protein plays a role in the proliferation, migration, and axon guidance of neurons of the developing cerebellum. A mutation in this gene may be associated with adult myoclonic epilepsy. [provided by RefSeq, Sep 2016]

CNTN2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000118 (18/152250) while in subpopulation NFE AF= 0.000221 (15/68002). AF 95% confidence interval is 0.000135. There are 0 homozygotes in gnomad4. There are 6 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNTN2	NM_005076.5 link	c.1295G>A	p.Arg432His	missense_variant	Exon 11 of 23	ENST00000331830.7	NP_005067.1	Q02246A1ML24A1L3A3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CNTN2	ENST00000331830.7 link	c.1295G>A	p.Arg432His	missense_variant	Exon 11 of 23	1	NM_005076.5	ENSP00000330633.4		Q02246

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000221

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000479

AC:

AN:

250380

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135534

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

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:

0.0000972

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000204

AC:

298

AN:

1457304

Hom.:

Cov.:

AF XY:

0.000220

AC XY:

159

AN XY:

723990

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000259

Gnomad4 OTH exome

AF:

0.000150

GnomAD4 genome

AF:

0.000118

AC:

AN:

152250

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000221

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000147

Hom.:

Bravo

AF:

0.0000869

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Epilepsy, familial adult myoclonic, 5

Uncertain:1

Jan 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 432 of the CNTN2 protein (p.Arg432His). This variant is present in population databases (rs200098924, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with CNTN2-related conditions. ClinVar contains an entry for this variant (Variation ID: 571898). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CNTN2 protein function with a negative predictive value of 95%. 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

0.27

BayesDel_addAF

Benign

-0.070

BayesDel_noAF

Uncertain

-0.030

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.33

T;T;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

.;.;D

M_CAP

Benign

0.041

MetaRNN

Uncertain

0.48

T;T;T

MetaSVM

Uncertain

0.23

MutationAssessor

Benign

1.2

L;L;.

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-2.2

.;N;.

REVEL

Uncertain

0.55

Sift

Benign

0.055

.;T;.

Sift4G

Uncertain

0.027

.;D;.

Polyphen

1.0

D;D;.

Vest4

0.72

MVP

0.91

MPC

1.4

ClinPred

0.38

GERP RS

5.3

Varity_R

0.12

gMVP

0.57

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