rs199696535

Positions:

chr1-55008435-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_057176.3(BSND):c.770A>G(p.Gln257Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000489 in 1,614,216 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000048 ( 0 hom. )

Consequence

BSND
NM_057176.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 0.415

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.047006845).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BSND	NM_057176.3 linkuse as main transcript	c.770A>G	p.Gln257Arg	missense_variant	4/4	ENST00000651561.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BSND	ENST00000651561.1 linkuse as main transcript	c.770A>G	p.Gln257Arg	missense_variant	4/4		NM_057176.3	P1

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152250

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000115

AC:

AN:

251176

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135798

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000704

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000479

AC:

AN:

1461848

Hom.:

Cov.:

AF XY:

0.0000509

AC XY:

AN XY:

727224

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000514

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000387

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152368

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74508

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.000102

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Aug 04, 2022	This sequence change replaces glutamine, which is neutral and polar, with arginine, which is basic and polar, at codon 257 of the BSND protein (p.Gln257Arg). This variant is present in population databases (rs199696535, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with BSND-related conditions. ClinVar contains an entry for this variant (Variation ID: 517488). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 31, 2022	Reported without a second variant in a patient with Dent disease in published literature (Cogal et al., 2021); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 34805638) -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jul 13, 2017

The p.Gln257Arg variant in BSND has not been previously reported in individuals with hearing loss, but has been reported in 21/34412 Latino chromosomes by the G enome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs19 9696535). Although this variant has been seen in the general population, its fre quency is not high enough to rule out a pathogenic role. Computational predictio n tools and conservation analyses suggest that this variant may not impact the p rotein, though this information is not predictive enough to rule out pathogenici ty. In summary, the clinical significance of the p.Gln257Arg variant is uncertai n. -

Bartter disease type 4A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

May 04, 2022

- -

Bartter syndrome

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Oct 28, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.28

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.57

Eigen

Benign

-0.53

Eigen_PC

Benign

-0.63

FATHMM_MKL

Benign

0.084

LIST_S2

Benign

0.39

M_CAP

Benign

0.070

MetaRNN

Benign

0.047

MetaSVM

Benign

-0.60

MutationAssessor

Benign

1.6

MutationTaster

Benign

1.0

PrimateAI

Benign

0.28

PROVEAN

Benign

-1.8

REVEL

Benign

0.27

Sift

Benign

0.10

Sift4G

Benign

0.22

Polyphen

0.72

Vest4

0.099

MVP

0.58

MPC

0.33

ClinPred

0.052

GERP RS

2.2

Varity_R

0.074

gMVP

0.053

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