rs1060502510

chrX-10194980-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP2

The NM_001830.4(CLCN4):c.314C>G(p.Ser105Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,209,721 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000090 ( 0 hom., 0 hem., cov: 22)

Exomes 𝑓: 0.0000018 ( 0 hom. 0 hem. )

Consequence

CLCN4
NM_001830.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 3.14

Variant links:

Genes affected

CLCN4 (HGNC:2022): (chloride voltage-gated channel 4) The CLCN family of voltage-dependent chloride channel genes comprises nine members (CLCN1-7, Ka and Kb) which demonstrate quite diverse functional characteristics while sharing significant sequence homology. Chloride channel 4 has an evolutionary conserved CpG island and is conserved in both mouse and hamster. This gene is mapped in close proximity to APXL (Apical protein Xenopus laevis-like) and OA1 (Ocular albinism type I), which are both located on the human X chromosome at band p22.3. The physiological role of chloride channel 4 remains unknown but may contribute to the pathogenesis of neuronal disorders. Alternate splicing results in two transcript variants that encode different proteins. [provided by RefSeq, Mar 2012]

CLCN4 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, CLCN4

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CLCN4	NM_001830.4 linkuse as main transcript	c.314C>G	p.Ser105Cys	missense_variant	5/13	ENST00000380833.9
CLCN4	NM_001256944.2 linkuse as main transcript	c.32C>G	p.Ser11Cys	missense_variant	3/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CLCN4	ENST00000380833.9 linkuse as main transcript	c.314C>G	p.Ser105Cys	missense_variant	5/13	1	NM_001830.4	P4	P51793-1

Frequencies

GnomAD3 genomes

AF:

0.00000895

AC:

AN:

111689

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33855

show subpopulations

Gnomad AFR

AF:

0.0000326

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000182

AC:

AN:

1098032

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363392

show subpopulations

Gnomad4 AFR exome

AF:

0.0000758

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000895

AC:

AN:

111689

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33855

show subpopulations

Gnomad4 AFR

AF:

0.0000326

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Oct 12, 2023	Has not been previously reported as pathogenic or benign in association with CLCN4-related disorders to our knowledge; A published functional study suggests this variant does not have a damaging effect, however additional studies are needed to validate the functional effect of this variant in vivo (Palmer et al., 2022); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 36385166) -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Aug 03, 2023	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. 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 expected to disrupt CLCN4 protein function. ClinVar contains an entry for this variant (Variation ID: 409642). This variant has not been reported in the literature in individuals affected with CLCN4-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces serine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 105 of the CLCN4 protein (p.Ser105Cys). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.54

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

Cadd

Uncertain

Dann

Benign

0.96

FATHMM_MKL

Benign

0.74

LIST_S2

Uncertain

0.96

D;D;D;D

M_CAP

Uncertain

0.17

MetaRNN

Uncertain

0.58

D;D;D;D

MetaSVM

Uncertain

0.28

MutationTaster

Benign

0.54

D;D;N

PrimateAI

Pathogenic

0.85

PROVEAN

Uncertain

-3.3

D;D;D;D

REVEL

Uncertain

0.49

Sift

Uncertain

0.013

D;D;D;D

Sift4G

Uncertain

0.024

D;D;D;D

Polyphen

0.25

.;B;.;.

Vest4

0.55

MutPred

0.43

.;Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);

MVP

1.0

MPC

1.4

ClinPred

0.88

GERP RS

3.4

Varity_R

0.43

gMVP

0.93

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