rs201255508

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1PM2PM5PP3_ModeratePP5_Very_Strong

The NM_001126108.2(SLC12A3):c.247C>T(p.Arg83Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000211 in 1,613,788 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R83Q) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

SLC12A3
NM_001126108.2 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 2.25

Variant links:

Genes affected

SLC12A3 (HGNC:10912): (solute carrier family 12 member 3) This gene encodes a renal thiazide-sensitive sodium-chloride cotransporter that is important for electrolyte homeostasis. This cotransporter mediates sodium and chloride reabsorption in the distal convoluted tubule. Mutations in this gene cause Gitelman syndrome, a disease similar to Bartter's syndrome, that is characterized by hypokalemic alkalosis combined with hypomagnesemia, low urinary calcium, and increased renin activity associated with normal blood pressure. This cotransporter is the target for thiazide diuretics that are used for treating high blood pressure. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

SLC12A3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PM1

In a topological_domain Cytoplasmic (size 134) in uniprot entity S12A3_HUMAN there are 22 pathogenic changes around while only 6 benign (79%) in NM_001126108.2

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-56865483-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 632258.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.931

PP5

Variant 16-56865482-C-T is Pathogenic according to our data. Variant chr16-56865482-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 319889.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SLC12A3	NM_001126108.2 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26	ENST00000563236.6
SLC12A3	NM_000339.3 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26
SLC12A3	NM_001126107.2 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26
SLC12A3	NM_001410896.1 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC12A3	ENST00000563236.6 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26	1	NM_001126108.2	A1	P55017-1
SLC12A3	ENST00000438926.6 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26	1		A1	P55017-2
SLC12A3	ENST00000566786.5 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26	1		P4	P55017-3
SLC12A3	ENST00000262502.5 linkuse as main transcript	c.247C>T	p.Arg83Trp	missense_variant	1/26	5		A1

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152246

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000319

AC:

AN:

250818

Hom.:

AF XY:

0.0000516

AC XY:

AN XY:

135678

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000441

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000198

AC:

AN:

1461424

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727048

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000180

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152364

Hom.:

Cov.:

AF XY:

0.0000268

AC XY:

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000345

Hom.:

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial hypokalemia-hypomagnesemia

Pathogenic:7

Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics, University of Leipzig Medical Center	May 05, 2023	Criteria applied: PS3,PM3,PM5,PM2_SUP,PP4 -
Pathogenic, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center	Mar 29, 2024	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 28, 2017	The SLC12A3 c.247C>T (p.Arg83Trp) variant is reported in one study in which it is found in a compound heterozygous state with another missense variant in five patients with Gitelman syndrome (Vargas-Poussou et al. 2011). The p.Arg83Trp variant was absent from 200 control chromosomes and is reported at a frequency of 0.00005 in the European (non-Finnish) population of the Exome Aggregation Consortium database. Based on the evidence, the p.Arg83Trp variant is classified as likely pathogenic for Gitelman syndrome. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Knight Diagnostic Laboratories, Oregon Health and Sciences University	Sep 06, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Mar 19, 2022	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	European Hospital Georges Pompidou Genetics Department, Assistance Publique - Hôpitaux de Paris AP-HP	Apr 27, 2022	ACMG criteria used:PS3, PM1, PM2, PP3, PP5, PM3 -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Jan 11, 2024

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 83 of the SLC12A3 protein (p.Arg83Trp). This variant is present in population databases (rs201255508, gnomAD 0.006%). This missense change has been observed in individuals with SLC12A3-related conditions (PMID: 21415153). ClinVar contains an entry for this variant (Variation ID: 319889). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SLC12A3 protein function with a positive predictive value of 95%. Experimental studies have shown that this missense change affects SLC12A3 function (PMID: 27582097). This variant disrupts the p.Arg83 amino acid residue in SLC12A3. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 20675610, 21051746, 21415153). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.89

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.53

Cadd

Pathogenic

Dann

Pathogenic

1.0

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Benign

0.64

LIST_S2

Uncertain

0.95

D;D;D;D

M_CAP

Pathogenic

0.34

MetaRNN

Pathogenic

0.93

D;D;D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Uncertain

2.6

M;M;M;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-7.1

D;D;D;D

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

1.0

D;D;D;.

Vest4

0.95

MVP

0.99

MPC

0.48

ClinPred

0.96

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.98

gMVP

0.93

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