16-56865289-GC-G

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001126108.2(SLC12A3):c.55del(p.Arg19AlafsTer8) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SLC12A3 NM_001126108.2 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.26

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 Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 339 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 16-56865289-GC-G is Pathogenic according to our data. Variant chr16-56865289-GC-G is described in ClinVar as [Pathogenic]. Clinvar id is 1076450.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC12A3	NM_001126108.2	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26	ENST00000563236.6
SLC12A3	NM_000339.3	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26
SLC12A3	NM_001126107.2	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26
SLC12A3	NM_001410896.1	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC12A3	ENST00000563236.6	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26	1	NM_001126108.2	A1
SLC12A3	ENST00000438926.6	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26	1		A1
SLC12A3	ENST00000566786.5	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26	1		P4
SLC12A3	ENST00000262502.5	c.55del	p.Arg19AlafsTer8	frameshift_variant	1/26	5		A1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Oct 20, 2020

For these reasons, this variant has been classified as Pathogenic. This variant has not been reported in the literature in individuals with SLC12A3-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change creates a premature translational stop signal (p.Arg19Alafs*8) in the SLC12A3 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SLC12A3 are known to be pathogenic (PMID: 20848653, 22009145, 25841442). -

Computational scores

Source: dbNSFP v4.3

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-56899201;