rs1555499234
Variant summary
Our verdict is Pathogenic. Variant got 20 ACMG points: 20P and 0B. PVS1PM2PP3_ModeratePP5_Very_Strong
The NM_001126108.2(SLC12A3):c.283del(p.Gln95ArgfsTer19) variant causes a frameshift, splice region change. The variant allele was found at a frequency of 0.00000205 in 1,459,876 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.0000021 ( 0 hom. )
Consequence
SLC12A3
NM_001126108.2 frameshift, splice_region
NM_001126108.2 frameshift, splice_region
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 4.80
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]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 20 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 16-56867069-GC-G is Pathogenic according to our data. Variant chr16-56867069-GC-G is described in ClinVar as [Pathogenic]. Clinvar id is 448955.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SLC12A3 | NM_001126108.2 | c.283del | p.Gln95ArgfsTer19 | frameshift_variant, splice_region_variant | 2/26 | ENST00000563236.6 | |
SLC12A3 | NM_000339.3 | c.283del | p.Gln95ArgfsTer19 | frameshift_variant, splice_region_variant | 2/26 | ||
SLC12A3 | NM_001126107.2 | c.283-3del | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | ||||
SLC12A3 | NM_001410896.1 | c.283-3del | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SLC12A3 | ENST00000563236.6 | c.283del | p.Gln95ArgfsTer19 | frameshift_variant, splice_region_variant | 2/26 | 1 | NM_001126108.2 | A1 | |
SLC12A3 | ENST00000438926.6 | c.283del | p.Gln95ArgfsTer19 | frameshift_variant, splice_region_variant | 2/26 | 1 | A1 | ||
SLC12A3 | ENST00000566786.5 | c.283-3del | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | 1 | P4 | ||||
SLC12A3 | ENST00000262502.5 | c.283-3del | splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant | 5 | A1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1459876Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2AN XY: 726324
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32
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2
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GnomAD4 genome ? Cov.: 33
GnomAD4 genome
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Cov.:
33
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Familial hypokalemia-hypomagnesemia Pathogenic:4
Pathogenic, no assertion criteria provided | clinical testing | Natera, Inc. | Sep 16, 2020 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Medical Genetics UMG, Mater Domini University Hospital/ Magna Graecia University of Catanzaro | Mar 24, 2016 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Jul 08, 2021 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Jul 15, 2021 | - - |
not provided Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jul 11, 2023 | This variant is also known as Q95fs. ClinVar contains an entry for this variant (Variation ID: 448955). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. This premature translational stop signal has been observed in individual(s) with Gitelman syndrome (PMID: 17699451, 27872838). It has also been observed to segregate with disease in related individuals. This sequence change creates a premature translational stop signal (p.Gln95Argfs*19) 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). This variant is not present in population databases (gnomAD no frequency). - |
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Jan 23, 2019 | The c.283delC pathogenic variant in the SLC12A3 gene has been reported previously with another SLC12A3 variant in several individuals with Gitelman syndrome (Colussi et al., 2007; Corbetta et al., 2015; Grillone et al., 2016). The c.283delC variant causes a frameshift starting with codon Glutamine 95, changes this amino acid to an Arginine residue, and creates a premature Stop codon at position 19 of the new reading frame, denoted p.Gln95ArgfsX19. This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The c.283delC variant is not observed in large population cohorts (Lek et al., 2016). We interpret c.283delC as a pathogenic variant. - |
Computational scores
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SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_AG_spliceai
Position offset: 2
DS_AL_spliceai
Position offset: 1
Find out detailed SpliceAI scores and Pangolin per-transcript scores at