rs371971275

Positions:

• chr1-16052300-C-A
• chr1-16052300-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_000085.5(CLCNKB):​c.1511C>A​(p.Ala504Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 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. A504V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CLCNKB NM_000085.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.98

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.966

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CLCNKB	NM_000085.5	c.1511C>A	p.Ala504Glu	missense_variant	15/20	ENST00000375679.9
CLCNKB	NM_001165945.2	c.1004C>A	p.Ala335Glu	missense_variant	8/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CLCNKB	ENST00000375679.9	c.1511C>A	p.Ala504Glu	missense_variant	15/20	1	NM_000085.5	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.79	.;D;.
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D
M_CAP	Pathogenic	0.44	D
MetaRNN	Pathogenic	0.97	D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.6	.;H;.
MutationTaster	Benign	1.0	D;D
PROVEAN	Pathogenic	-4.5	.;D;D
REVEL	Pathogenic	0.89
Sift	Pathogenic	0.0	.;D;D
Sift4G	Uncertain	0.0020	D;D;D
Polyphen		1.0	.;D;.
Vest4		0.81
MutPred		0.85		.;Gain of sheet (P = 0.0827);.;
MVP		0.98
MPC		0.64
ClinPred		1.0	D
GERP RS		3.6
Varity_R		0.94
gMVP		0.83

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

Other links and lift over

dbSNP: rs371971275; hg19: chr1-16378795; COSMIC: COSV65159813; COSMIC: COSV65159813;