Genetic Variant CLCNKB:p.Arg27His (chr1-16044572-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000085.5(CLCNKB):c.80G>A(p.Arg27His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000461 in 151,898 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign 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. R27C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000027 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CLCNKB
NM_000085.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.00800

Publications

31 publications found

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 Gene-Disease associations (from GenCC):

Bartter disease type 3
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
Bartter disease type 4B
Inheritance: AR Classification: STRONG Submitted by: G2P
Bartter syndrome type 4
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Gitelman syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CLCNKB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11572239).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000085.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLCNKB	NM_000085.5	MANE Select	c.80G>A	p.Arg27His	missense	Exon 2 of 20	NP_000076.2	P51801-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CLCNKB	ENST00000375679.9	TSL:1 MANE Select	c.80G>A	p.Arg27His	missense	Exon 2 of 20	ENSP00000364831.5	P51801-1
CLCNKB	ENST00000906263.1		c.80G>A	p.Arg27His	missense	Exon 2 of 21	ENSP00000576322.1
CLCNKB	ENST00000906270.1		c.80G>A	p.Arg27His	missense	Exon 2 of 21	ENSP00000576329.1

Frequencies

GnomAD3 genomes

AF:

0.0000461

AC:

AN:

151780

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000485

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000132

AC:

AN:

226810

AF XY:

0.00000818

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000315

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000593

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000981

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000269

AC:

AN:

1449300

Hom.:

Cov.:

AF XY:

0.0000250

AC XY:

AN XY:

719472

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33416

American (AMR)

AF:

0.0000236

AC:

AN:

42418

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25770

East Asian (EAS)

AF:

0.000102

AC:

AN:

39264

South Asian (SAS)

AF:

0.00

AC:

AN:

83354

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.0000289

AC:

AN:

1106776

Other (OTH)

AF:

0.0000334

AC:

AN:

59956

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

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

AF:

0.0000461

AC:

AN:

151898

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74224

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41390

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.000194

AC:

AN:

5156

South Asian (SAS)

AF:

0.00

AC:

AN:

4804

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10574

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67916

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

28124

ExAC

AF:

0.00000830

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.084

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.36

Eigen

Benign

-0.45

Eigen_PC

Benign

-0.41

FATHMM_MKL

Benign

0.085

LIST_S2

Benign

0.13

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.12

MetaSVM

Benign

-0.34

MutationAssessor

Benign

1.6

PhyloP100

0.0080

PROVEAN

Benign

-2.2

REVEL

Benign

0.24

Sift

Benign

0.15

Sift4G

Benign

0.073

Polyphen

0.014

Vest4

0.18

MVP

0.87

MPC

0.036

ClinPred

0.046

GERP RS

3.2

Varity_R

0.050

gMVP

0.40

Mutation Taster

=95/5

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over