3-184353297-A-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_004366.6(CLCN2):c.1981T>A(p.Ser661Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000803 in 1,613,758 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S661P) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0042 ( 3 hom., cov: 31)

Exomes 𝑓: 0.00045 ( 11 hom. )

Consequence

CLCN2
NM_004366.6 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -0.0480

Publications

3 publications found

Variant links:

Genes affected

CLCN2 (HGNC:2020): (chloride voltage-gated channel 2) This gene encodes a voltage-gated chloride channel. The encoded protein is a transmembrane protein that maintains chloride ion homeostasis in various cells. Defects in this gene may be a cause of certain epilepsies. Four transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2012]

CLCN2 Gene-Disease associations (from GenCC):

leukoencephalopathy with mild cerebellar ataxia and white matter edema
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
epilepsy, idiopathic generalized, susceptibility to, 11
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
familial hyperaldosteronism type II
Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet
epilepsy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

CLCN2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0035895407).

BP6

Variant 3-184353297-A-T is Benign according to our data. Variant chr3-184353297-A-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 377181.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00416 (634/152248) while in subpopulation AFR AF = 0.0142 (592/41550). AF 95% confidence interval is 0.0133. There are 3 homozygotes in GnomAd4. There are 305 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLCN2	NM_004366.6 link	c.1981T>A	p.Ser661Thr	missense_variant	Exon 17 of 24	ENST00000265593.9	NP_004357.3	P51788-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLCN2	ENST00000265593.9 link	c.1981T>A	p.Ser661Thr	missense_variant	Exon 17 of 24	1	NM_004366.6	ENSP00000265593.4		P51788-1

Frequencies

GnomAD3 genomes

AF:

0.00415

AC:

631

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0142

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00209

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00335

GnomAD2 exomes

AF:

0.00105

AC:

264

AN:

251298

AF XY:

0.000810

show subpopulations

Gnomad AFR exome

AF:

0.0144

Gnomad AMR exome

AF:

0.000491

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000616

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000453

AC:

662

AN:

1461510

Hom.:

Cov.:

AF XY:

0.000386

AC XY:

281

AN XY:

727096

show subpopulations

African (AFR)

AF:

0.0161

AC:

538

AN:

33480

American (AMR)

AF:

0.000671

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53066

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000180

AC:

AN:

1111988

Other (OTH)

AF:

0.00111

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

Heterozygous variant carriers

127

169

211

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00416

AC:

634

AN:

152248

Hom.:

Cov.:

AF XY:

0.00410

AC XY:

305

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.0142

AC:

592

AN:

41550

American (AMR)

AF:

0.00209

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67992

Other (OTH)

AF:

0.00331

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

130

162

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000246

Hom.:

Bravo

AF:

0.00482

ESP6500AA

AF:

0.0102

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00130

AC:

158

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000296

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Jan 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CLCN2: BP4, BS1, BS2 -

Sep 02, 2016

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

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 20, 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

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.51

BayesDel_noAF

Benign

-0.49

CADD

Benign

0.22

(source)

DANN

Benign

0.80

DEOGEN2

Benign

0.14

T;.;.;.

Eigen

Benign

-0.77

Eigen_PC

Benign

-0.85

FATHMM_MKL

Benign

0.038

LIST_S2

Benign

0.59

T;T;T;T

MetaRNN

Benign

0.0036

T;T;T;T

MetaSVM

Benign

-0.79

MutationAssessor

Benign

0.85

L;.;.;L

PhyloP100

-0.048

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.84

N;N;N;N

REVEL

Benign

0.067

Sift

Benign

0.096

T;T;T;T

Sift4G

Benign

0.58

T;T;T;T

Polyphen

0.38

B;P;.;.

Vest4

0.10

MVP

0.73

MPC

0.27

ClinPred

0.00031

GERP RS

0.82

Varity_R

0.035

gMVP

0.37

Mutation Taster

=96/4

polymorphism

(source)

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

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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