rs121909136

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000085.5(CLCNKB):c.1830G>A(p.Trp610Ter) variant causes a stop gained change. The variant allele was found at a frequency of 0.0001 in 1,612,542 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000086 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00010 ( 0 hom. )

Consequence

CLCNKB
NM_000085.5 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 4.02

Variant links:

Genes affected

CLCNKB (HGNC:2027): (chloride voltage-gated channel Kb) The protein encoded by this gene is a member of the family of voltage-gated chloride channels. Chloride channels have several functions, including the regulation of cell volume, membrane potential stabilization, signal transduction and transepithelial transport. This gene is expressed predominantly in the kidney and may be important for renal salt reabsorption. Mutations in this gene are associated with autosomal recessive Bartter syndrome type 3 (BS3). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

CLCNKB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 1-16055508-G-A is Pathogenic according to our data. Variant chr1-16055508-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 7599.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CLCNKB	NM_000085.5 linkuse as main transcript	c.1830G>A	p.Trp610Ter	stop_gained	17/20	ENST00000375679.9
CLCNKB	NM_001165945.2 linkuse as main transcript	c.1323G>A	p.Trp441Ter	stop_gained	10/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CLCNKB	ENST00000375679.9 linkuse as main transcript	c.1830G>A	p.Trp610Ter	stop_gained	17/20	1	NM_000085.5	P4	P51801-1

Frequencies

GnomAD3 genomes

AF:

0.0000855

AC:

AN:

152004

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00259

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000169

AC:

AN:

248776

Hom.:

AF XY:

0.000104

AC XY:

AN XY:

135140

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00341

Gnomad EAS exome

AF:

0.000164

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000447

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000102

AC:

149

AN:

1460538

Hom.:

Cov.:

AF XY:

0.0000950

AC XY:

AN XY:

726528

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00394

Gnomad4 EAS exome

AF:

0.000680

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.0000855

AC:

AN:

152004

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74262

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00259

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000175

Hom.:

ExAC

AF:

0.000157

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Apr 27, 2023	Published functional studies demonstrate W610X results in altered chloride channel kinetics (Stlting et al., 2015); Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 25525159, 26453302, 25606418, 20810575, 15531551, 24965226, 31980526, 26920127, 33348466, 29372472, 33095447, 28381550, 16902263, 15717167, 31345219) -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Nov 07, 2023	This sequence change creates a premature translational stop signal (p.Trp610*) in the CLCNKB gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CLCNKB are known to be pathogenic (PMID: 24830959, 26920127, 28381550, 29254190). This variant is present in population databases (rs121909136, gnomAD 0.3%). This premature translational stop signal has been observed in individuals with Bartter syndrome (PMID: 16902263, 17622951, 24965226). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 7599). For these reasons, this variant has been classified as Pathogenic. -

Bartter syndrome, type 3, with hypocalciuria

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 01, 2004

- -

Bartter disease type 3;C4310805:Bartter disease type 4B

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jun 30, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.56

Cadd

Pathogenic

Dann

Uncertain

0.99

Eigen

Pathogenic

0.69

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Benign

0.23

MutationTaster

Benign

1.0

A;A

Vest4

0.77

GERP RS

3.7

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