Genetic Variant BSND:p.Leu21Leu (chr1-54999249-C-T) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_057176.3(BSND):c.63C>T(p.Leu21Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00153 in 1,614,116 control chromosomes in the GnomAD database, including 34 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0012 ( 2 hom., cov: 33)

Exomes 𝑓: 0.0016 ( 32 hom. )

Consequence

BSND
NM_057176.3 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: -3.73

Publications

2 publications found

Variant links:

Genes affected

BSND (HGNC:16512): (barttin CLCNK type accessory subunit beta) This gene encodes an essential beta subunit for CLC chloride channels. These heteromeric channels localize to basolateral membranes of renal tubules and of potassium-secreting epithelia of the inner ear. Mutations in this gene have been associated with Bartter syndrome with sensorineural deafness. [provided by RefSeq, Jul 2008]

BSND Gene-Disease associations (from GenCC):

Bartter disease type 4A
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P
Bartter syndrome type 4
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BSND links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 1-54999249-C-T is Benign according to our data. Variant chr1-54999249-C-T is described in ClinVar as Benign. ClinVar VariationId is 46550.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-3.73 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00122 (185/152244) while in subpopulation SAS AF = 0.0133 (64/4830). AF 95% confidence interval is 0.0106. There are 2 homozygotes in GnomAd4. There are 107 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_057176.3. 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
	BSND	NM_057176.3	MANE Select	c.63C>T	p.Leu21Leu	synonymous	Exon 1 of 4	NP_476517.1	Q8WZ55

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BSND	ENST00000651561.1	MANE Select	c.63C>T	p.Leu21Leu	synonymous	Exon 1 of 4	ENSP00000498282.1	Q8WZ55

Frequencies

GnomAD3 genomes

AF:

0.00120

AC:

183

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000628

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000851

Gnomad ASJ

AF:

0.00346

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.0128

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000912

Gnomad OTH

AF:

0.00382

GnomAD2 exomes

AF:

0.00247

AC:

622

AN:

251422

AF XY:

0.00320

show subpopulations

Gnomad AFR exome

AF:

0.000861

Gnomad AMR exome

AF:

0.00110

Gnomad ASJ exome

AF:

0.00456

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00101

Gnomad OTH exome

AF:

0.00261

GnomAD4 exome

AF:

0.00156

AC:

2285

AN:

1461872

Hom.:

Cov.:

AF XY:

0.00205

AC XY:

1493

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.000896

AC:

AN:

33480

American (AMR)

AF:

0.00110

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00398

AC:

104

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0144

AC:

1238

AN:

86258

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.0149

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000594

AC:

660

AN:

1112008

Other (OTH)

AF:

0.00194

AC:

117

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.456

Heterozygous variant carriers

138

276

414

552

690

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

150

<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:

0.00122

AC:

185

AN:

152244

Hom.:

Cov.:

AF XY:

0.00144

AC XY:

107

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.000626

AC:

AN:

41530

American (AMR)

AF:

0.000850

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00346

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5160

South Asian (SAS)

AF:

0.0133

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000912

AC:

AN:

68008

Other (OTH)

AF:

0.00378

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00106

Hom.:

Bravo

AF:

0.00108

Asia WGS

AF:

0.00520

AC:

AN:

3478

EpiCase

AF:

0.00174

EpiControl

AF:

0.00184

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (4)

not specified (2)

Bartter disease type 4A (1)

Bartter syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

0.19

(source)

DANN

Benign

0.73

PhyloP100

-3.7

PromoterAI

-0.011

Neutral

(source)

Mutation Taster

=100/0

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