rs137852706

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PP3_Strong

The NM_000336.3(SCNN1B):c.109G>A(p.Gly37Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000105 in 1,613,940 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

SCNN1B
NM_000336.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:1B:2

Conservation

PhyloP100: 7.33

Variant links:

Genes affected

SCNN1B (HGNC:10600): (sodium channel epithelial 1 subunit beta) Nonvoltage-gated, amiloride-sensitive, sodium channels control fluid and electrolyte transport across epithelia in many organs. These channels are heteromeric complexes consisting of 3 subunits: alpha, beta, and gamma. This gene encodes the beta subunit, and mutations in this gene have been associated with pseudohypoaldosteronism type 1 (PHA1), and Liddle syndrome. [provided by RefSeq, Apr 2009]

SCNN1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.986

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCNN1B	NM_000336.3 linkuse as main transcript	c.109G>A	p.Gly37Ser	missense_variant	2/13	ENST00000343070.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCNN1B	ENST00000343070.7 linkuse as main transcript	c.109G>A	p.Gly37Ser	missense_variant	2/13	1	NM_000336.3	P1	P51168-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251114

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135724

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000109

AC:

AN:

1461756

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727160

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74350

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Pseudohypoaldosteronism, type IB2, autosomal recessive

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 03, 1997

- -

Autosomal recessive pseudohypoaldosteronism type 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Sep 06, 2017

The SCNN1B c.109G>A (p.Gly37Ser) variant has been reported in one study and was found in a homozygous state in two male cousins, both affected with pseudohypoaldosteronism type I, from a large consanguineous family of Arabic ancestry (Chang et al. 1996). Both parents of both affected individuals were unaffected and carried the variant in a heterozygous state. The p.Gly37Ser variant is absent from 160 unrelated control alleles and is reported at a frequency of 0.000135 in the European (non-Finnish) population of the Genome Aggregation Database. Amiloride sensitive sodium ion currents measured by 2-electrode voltage clamp in oocytes expressing wild type or p.Gly37Ser variant in the beta subunit revealed that the oocytes with the variant had an approximately 60% reduction of sodium channel activity (Chang et al. 1996). The decrease in macroscopic sodium currents is suggested due to a decrease in channel open probability, which would explain the disease pathophysiology (Grunder et al. 1997; Kucher et al. 2011). Based on the limited clinical evidence, the p.Gly37Ser variant is considered to be of unknown significance but suspicious for pathogenicity for autosomal recessive pseudohypoaldosteronism type I. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Liddle syndrome 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Aug 29, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Bronchiectasis with or without elevated sweat chloride 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Aug 29, 2017

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.96

BayesDel_addAF

Pathogenic

0.29

BayesDel_noAF

Pathogenic

0.37

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.77

D;.;.;.

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.93

D;D;D;D

M_CAP

Uncertain

0.23

MetaRNN

Pathogenic

0.99

D;D;D;D

MetaSVM

Uncertain

0.65

MutationAssessor

Pathogenic

3.6

H;.;.;.

MutationTaster

Benign

1.0

A;A;A;A

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-5.2

D;D;D;D

REVEL

Pathogenic

0.87

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

1.0

D;.;.;.

Vest4

0.98

MutPred

0.95

Gain of loop (P = 0.1069);.;Gain of loop (P = 0.1069);Gain of loop (P = 0.1069);

MVP

0.97

MPC

0.63

ClinPred

0.99

GERP RS

4.9

Varity_R

0.83

gMVP

0.94

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