Genetic Variant NM_004366.6:c.1015G>A (chr3-184357063-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004366.6(CLCN2):c.1015G>A(p.Val339Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,558 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V339L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CLCN2
NM_004366.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.90

Publications

0 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: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004366.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CLCN2	NM_004366.6	MANE Select	c.1015G>A	p.Val339Ile	missense	Exon 10 of 24	NP_004357.3
CLCN2	NM_001171087.3		c.1015G>A	p.Val339Ile	missense	Exon 10 of 24	NP_001164558.1
CLCN2	NM_001171089.3		c.1015G>A	p.Val339Ile	missense	Exon 10 of 23	NP_001164560.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CLCN2	ENST00000265593.9	TSL:1 MANE Select	c.1015G>A	p.Val339Ile	missense	Exon 10 of 24	ENSP00000265593.4
CLCN2	ENST00000344937.11	TSL:1	c.1015G>A	p.Val339Ile	missense	Exon 10 of 24	ENSP00000345056.7
CLCN2	ENST00000938001.1		c.1132G>A	p.Val378Ile	missense	Exon 11 of 25	ENSP00000608060.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461558

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727028

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86146

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53380

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111888

Other (OTH)

AF:

0.0000166

AC:

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.34

BayesDel_addAF

Pathogenic

0.28

BayesDel_noAF

Pathogenic

0.17

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.48

Eigen

Uncertain

0.62

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.96

M_CAP

Uncertain

0.091

MetaRNN

Uncertain

0.73

MetaSVM

Uncertain

0.77

MutationAssessor

Benign

0.82

PhyloP100

7.9

PrimateAI

Uncertain

0.78

PROVEAN

Benign

-0.93

REVEL

Pathogenic

0.75

Sift

Uncertain

0.020

Sift4G

Uncertain

0.054

Polyphen

0.99

Vest4

0.71

MutPred

0.50

Gain of catalytic residue at V339 (P = 0.0756)

MVP

0.97

MPC

0.82

ClinPred

0.86

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.31

gMVP

0.62

Mutation Taster

=163/137

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over