1-205059101-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_005076.5(CNTN2):c.505C>T(p.Leu169Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0032 in 1,614,204 control chromosomes in the GnomAD database, including 12 homozygotes. 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0022 ( 2 hom., cov: 32)

Exomes 𝑓: 0.0033 ( 10 hom. )

Consequence

CNTN2
NM_005076.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 0.717

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 Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009752125).

BP6

Variant 1-205059101-C-T is Benign according to our data. Variant chr1-205059101-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 445932.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}. Variant chr1-205059101-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00224 (342/152342) while in subpopulation NFE AF= 0.00414 (282/68034). AF 95% confidence interval is 0.00375. There are 2 homozygotes in gnomad4. There are 155 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNTN2	NM_005076.5 link	c.505C>T	p.Leu169Phe	missense_variant	Exon 6 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.505C>T	p.Leu169Phe	missense_variant	Exon 6 of 23	1	NM_005076.5	ENSP00000330633.4		Q02246

Frequencies

GnomAD3 genomes

AF:

0.00225

AC:

343

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000651

Gnomad AMI

AF:

0.00219

Gnomad AMR

AF:

0.00118

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00103

Gnomad FIN

AF:

0.000282

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00416

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.00260

AC:

653

AN:

251318

Hom.:

AF XY:

0.00255

AC XY:

346

AN XY:

135866

show subpopulations

Gnomad AFR exome

AF:

0.000738

Gnomad AMR exome

AF:

0.00202

Gnomad ASJ exome

AF:

0.000397

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00108

Gnomad FIN exome

AF:

0.000370

Gnomad NFE exome

AF:

0.00443

Gnomad OTH exome

AF:

0.00359

GnomAD4 exome

AF:

0.00330

AC:

4827

AN:

1461862

Hom.:

Cov.:

AF XY:

0.00333

AC XY:

2421

AN XY:

727232

show subpopulations

Gnomad4 AFR exome

AF:

0.000597

Gnomad4 AMR exome

AF:

0.00226

Gnomad4 ASJ exome

AF:

0.000536

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00101

Gnomad4 FIN exome

AF:

0.000543

Gnomad4 NFE exome

AF:

0.00399

Gnomad4 OTH exome

AF:

0.00205

GnomAD4 genome

AF:

0.00224

AC:

342

AN:

152342

Hom.:

Cov.:

AF XY:

0.00208

AC XY:

155

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.000649

Gnomad4 AMR

AF:

0.00118

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00104

Gnomad4 FIN

AF:

0.000282

Gnomad4 NFE

AF:

0.00414

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00336

Hom.:

Bravo

AF:

0.00255

TwinsUK

AF:

0.00485

AC:

ALSPAC

AF:

0.00389

AC:

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00419

AC:

ExAC

AF:

0.00267

AC:

324

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00365

EpiControl

AF:

0.00474

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Mar 09, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

CNTN2: BS2 -

CNTN2-related disorder

Benign:1

Jan 09, 2020

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Epilepsy, familial adult myoclonic, 5

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.60

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

T;T;.

Eigen

Benign

-0.14

Eigen_PC

Benign

-0.0088

FATHMM_MKL

Benign

0.75

LIST_S2

Uncertain

0.88

.;.;D

M_CAP

Benign

0.0037

MetaRNN

Benign

0.0098

T;T;T

MetaSVM

Benign

-0.94

MutationAssessor

Benign

0.82

L;L;.

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-1.7

.;N;.

REVEL

Benign

0.044

Sift

Benign

0.21

.;T;.

Sift4G

Benign

0.34

.;T;.

Polyphen

0.060

B;B;.

Vest4

0.27

MVP

0.48

MPC

0.52

ClinPred

0.016

GERP RS

4.0

Varity_R

0.36

gMVP

0.67

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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