chr16-56913302-C-G

Variant names:

• chr16-56913302-C-G
• rs141867836
• NM_001126108.2:c.2963C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001126108.2(SLC12A3):​c.2963C>G​(p.Ser988Trp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S988S) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SLC12A3 NM_001126108.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.79

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC12A3	NM_001126108.2	c.2963C>G	p.Ser988Trp	missense_variant	Exon 26 of 26	ENST00000563236.6	NP_001119580.2
SLC12A3	NM_000339.3	c.2990C>G	p.Ser997Trp	missense_variant	Exon 26 of 26		NP_000330.3
SLC12A3	NM_001126107.2	c.2987C>G	p.Ser996Trp	missense_variant	Exon 26 of 26		NP_001119579.2
SLC12A3	NM_001410896.1	c.2960C>G	p.Ser987Trp	missense_variant	Exon 26 of 26		NP_001397825.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC12A3	ENST00000563236.6	c.2963C>G	p.Ser988Trp	missense_variant	Exon 26 of 26	1	NM_001126108.2	ENSP00000456149.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461892 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

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: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.45
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	27
DANN	Benign	0.94
DEOGEN2	Uncertain	0.63	.;.;D;D
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.90	D;D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Uncertain	0.47	T;T;T;T
MetaSVM	Uncertain	0.19	D
MutationAssessor	Uncertain	2.1	.;.;M;.
PrimateAI	Uncertain	0.54	T
PROVEAN	Uncertain	-3.0	D;D;D;D
REVEL	Uncertain	0.55
Sift	Benign	0.21	T;T;T;T
Sift4G	Benign	0.13	T;T;T;T
Polyphen		0.029	B;D;D;.
Vest4		0.61
MutPred		0.50		.;.;Gain of catalytic residue at M991 (P = 0.0084);.;
MVP		0.91
MPC		0.53
ClinPred		0.94	D
GERP RS		4.3
Varity_R		0.39
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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

Other links and lift over

dbSNP: rs141867836; hg19: chr16-56947214;