rs121909137

Variant names:

• chr1-16024773-G-C
• rs121909137
• NM_004070.4:c.240G>C

Your query was ambiguous. Multiple possible variants found:

• chr1-16024773-G-C
• chr1-16024773-G-T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_004070.4(CLCNKA):​c.240G>C​(p.Trp80Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CLCNKA NM_004070.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.01
• Publications: 5 publications found

Genes affected

CLCNKA (HGNC:2026): (chloride voltage-gated channel Ka) This gene is a member of the CLC family of voltage-gated chloride channels. The encoded protein is predicted to have 12 transmembrane domains, and requires a beta subunit called barttin to form a functional channel. It is thought to function in salt reabsorption in the kidney and potassium recycling in the inner ear. The gene is highly similar to CLCNKB, which is located 10 kb downstream from this gene. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

CLCNKA Gene-Disease associations (from GenCC):

• Bartter disease type 4B

  Inheritance: Unknown, AR Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, G2P
• Bartter syndrome type 4

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant 1-16024773-G-C is Pathogenic according to our data. Variant chr1-16024773-G-C is described in ClinVar as Pathogenic. ClinVar VariationId is 7589.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004070.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLCNKA	NM_004070.4	MANE Select	c.240G>C	p.Trp80Cys	missense	Exon 4 of 20	NP_004061.3
	CLCNKA	NM_001042704.2		c.240G>C	p.Trp80Cys	missense	Exon 4 of 20	NP_001036169.1
	CLCNKA	NM_001257139.2		c.229+845G>C		intron	N/A	NP_001244068.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLCNKA	ENST00000331433.5	TSL:1 MANE Select	c.240G>C	p.Trp80Cys	missense	Exon 4 of 20	ENSP00000332771.4
	CLCNKA	ENST00000375692.5	TSL:1	c.240G>C	p.Trp80Cys	missense	Exon 5 of 21	ENSP00000364844.1
	CLCNKA	ENST00000495784.1	TSL:5	n.398G>C		non_coding_transcript_exon	Exon 4 of 6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Bartter disease type 4B Pathogenic:1

Mar 25, 2004

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.73
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.46
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.68	D
Eigen	Pathogenic	0.73
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.5	H
PhyloP100		9.0
PrimateAI	Uncertain	0.62	T
PROVEAN	Pathogenic	-12	D
REVEL	Pathogenic	0.89
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.86
MutPred		0.89		Gain of catalytic residue at L81 (P = 0.0718)
MVP		0.98
MPC		1.4
ClinPred		1.0	D
GERP RS		4.0
Varity_R		0.90
gMVP		0.63
Mutation Taster		=6/94	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121909137; hg19: chr1-16351268;