Genetic Variant SLC12A3:p.Ala728Ser (chr16-56887928-G-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 5P and 2B. PM1PM2PP2BP4_Moderate

The NM_001126108.2(SLC12A3):c.2182G>T(p.Ala728Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,609,820 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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. A728T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

SLC12A3
NM_001126108.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.13

Publications

19 publications found

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 Gene-Disease associations (from GenCC):

Gitelman syndrome
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

SLC12A3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM1

In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_001126108.2

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 138 curated pathogenic missense variants (we use a threshold of 10). The gene has 18 curated benign missense variants. Gene score misZ: -0.93606 (below the threshold of 3.09). Trascript score misZ: 0.71313 (below the threshold of 3.09). GenCC associations: The gene is linked to Gitelman syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.08835381).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001126108.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SLC12A3	NM_001126108.2	MANE Select	c.2182G>T	p.Ala728Ser	missense	Exon 18 of 26	NP_001119580.2
SLC12A3	NM_000339.3		c.2182G>T	p.Ala728Ser	missense	Exon 18 of 26	NP_000330.3
SLC12A3	NM_001126107.2		c.2179G>T	p.Ala727Ser	missense	Exon 18 of 26	NP_001119579.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SLC12A3	ENST00000563236.6	TSL:1 MANE Select	c.2182G>T	p.Ala728Ser	missense	Exon 18 of 26	ENSP00000456149.2
SLC12A3	ENST00000438926.6	TSL:1	c.2182G>T	p.Ala728Ser	missense	Exon 18 of 26	ENSP00000402152.2
SLC12A3	ENST00000566786.5	TSL:1	c.2179G>T	p.Ala727Ser	missense	Exon 18 of 26	ENSP00000457552.1

Frequencies

GnomAD3 genomes

AF:

0.00000662

AC:

AN:

150994

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:

0.000209

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1458826

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

725792

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33402

American (AMR)

AF:

0.00

AC:

AN:

44668

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26052

East Asian (EAS)

AF:

0.00

AC:

AN:

39622

South Asian (SAS)

AF:

0.00

AC:

AN:

86232

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52892

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

9.01e-7

AC:

AN:

1109998

Other (OTH)

AF:

0.00

AC:

AN:

60224

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

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:

0.00000662

AC:

AN:

150994

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73674

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41002

American (AMR)

AF:

0.00

AC:

AN:

15134

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3458

East Asian (EAS)

AF:

0.00

AC:

AN:

5132

South Asian (SAS)

AF:

0.000209

AC:

AN:

4782

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10374

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67816

Other (OTH)

AF:

0.00

AC:

AN:

2070

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.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.075

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.50

CADD

Benign

0.042

(source)

DANN

Benign

0.17

DEOGEN2

Benign

0.18

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.078

LIST_S2

Benign

0.72

M_CAP

Benign

0.030

MetaRNN

Benign

0.088

MetaSVM

Benign

-0.79

MutationAssessor

Benign

-0.025

PhyloP100

-1.1

PrimateAI

Benign

0.29

PROVEAN

Benign

0.82

REVEL

Benign

0.23

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.10

MutPred

0.50

Gain of MoRF binding (P = 0.1001)

MVP

0.61

MPC

0.080

ClinPred

0.038

GERP RS

-0.68

Varity_R

0.039

gMVP

0.56

Mutation Taster

=97/3

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