1-205057955-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_ModerateBP6_ModerateBP7BS1BS2

The NM_005076.5(CNTN2):c.105C>T(p.Phe35Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00212 in 1,614,148 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0022 ( 3 hom. )

Consequence

CNTN2
NM_005076.5 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:2

Conservation

PhyloP100: -0.264

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
epilepsy, familial adult myoclonic, 5
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
benign adult familial myoclonic epilepsy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CNTN2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.37).

BP6

Variant 1-205057955-C-T is Benign according to our data. Variant chr1-205057955-C-T is described in ClinVar as [Benign]. Clinvar id is 474457.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.264 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00173 (264/152346) while in subpopulation NFE AF = 0.00293 (199/68034). AF 95% confidence interval is 0.00259. There are 0 homozygotes in GnomAd4. There are 128 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 3 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNTN2	NM_005076.5 link	c.105C>T	p.Phe35Phe	synonymous_variant	Exon 3 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.105C>T	p.Phe35Phe	synonymous_variant	Exon 3 of 23	1	NM_005076.5	ENSP00000330633.4		Q02246

Frequencies

GnomAD3 genomes

AF:

0.00173

AC:

264

AN:

152228

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000654

Gnomad ASJ

AF:

0.00605

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00292

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.00185

AC:

464

AN:

251128

AF XY:

0.00180

show subpopulations

Gnomad AFR exome

AF:

0.000369

Gnomad AMR exome

AF:

0.000376

Gnomad ASJ exome

AF:

0.00626

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00250

Gnomad NFE exome

AF:

0.00275

Gnomad OTH exome

AF:

0.00229

GnomAD4 exome

AF:

0.00217

AC:

3165

AN:

1461802

Hom.:

Cov.:

AF XY:

0.00219

AC XY:

1593

AN XY:

727210

show subpopulations

African (AFR)

AF:

0.000358

AC:

AN:

33478

American (AMR)

AF:

0.000514

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00677

AC:

177

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00266

AC:

142

AN:

53398

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.00243

AC:

2701

AN:

1111996

Other (OTH)

AF:

0.00174

AC:

105

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

157

314

471

628

785

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00173

AC:

264

AN:

152346

Hom.:

Cov.:

AF XY:

0.00172

AC XY:

128

AN XY:

74502

show subpopulations

African (AFR)

AF:

0.000264

AC:

AN:

41592

American (AMR)

AF:

0.000653

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00605

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00188

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00293

AC:

199

AN:

68034

Other (OTH)

AF:

0.00142

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00295

Hom.:

Bravo

AF:

0.00154

EpiCase

AF:

0.00311

EpiControl

AF:

0.00255

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

CNTN2-related disorder

Benign:1

Apr 22, 2019

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 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.37

CADD

Benign

8.2

(source)

DANN

Benign

0.66

PhyloP100

-0.26

Mutation Taster

=84/16

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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1-205057955-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over