chr12-868421-GA-G

Position:

• chr12-868421-GA-G

Variant summary

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

The NM_213655.5(WNK1):​c.2952del​(p.Glu984AspfsTer10) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000274 in 1,461,680 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: WNK1 NM_213655.5 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:2 O:1
• Conservation: PhyloP100: 7.13

Genes affected

WNK1 (HGNC:14540): (WNK lysine deficient protein kinase 1) This gene encodes a member of the WNK subfamily of serine/threonine protein kinases. The encoded protein may be a key regulator of blood pressure by controlling the transport of sodium and chloride ions. Mutations in this gene have been associated with pseudohypoaldosteronism type II and hereditary sensory neuropathy type II. Alternatively spliced transcript variants encoding different isoforms have been described but the full-length nature of all of them has yet to be determined.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Pathogenic. Variant got 12 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
• PP5: Variant 12-868421-GA-G is Pathogenic according to our data. Variant chr12-868421-GA-G is described in ClinVar as [Pathogenic]. Clinvar id is 21269.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WNK1	NM_213655.5	c.2952del	p.Glu984AspfsTer10	frameshift_variant	10/28	ENST00000340908.9
WNK1	NM_018979.4	c.2140-2842del		intron_variant		ENST00000315939.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WNK1	ENST00000340908.9	c.2952del	p.Glu984AspfsTer10	frameshift_variant	10/28	5	NM_213655.5	A2
WNK1	ENST00000315939.11	c.2140-2842del		intron_variant		1	NM_018979.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461680 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727124

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neuropathy, hereditary sensory and autonomic, type 2A Pathogenic:1 Other:1

not provided, no classification provided	literature only	GeneReviews	-	French Canadian founder variants -
Pathogenic, no assertion criteria provided	literature only	OMIM	May 01, 2004	- -

Pseudohypoaldosteronism type 2C;C2752089:Neuropathy, hereditary sensory and autonomic, type 2A Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 19, 2021

ClinVar contains an entry for this variant (Variation ID: 21269). For these reasons, this variant has been classified as Pathogenic. This premature translational stop signal has been observed in individual(s) with hereditary sensory and autonomic neuropathy (PMID: 15060842). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (ExAC no frequency). This sequence change creates a premature translational stop signal (p.Glu984Aspfs*10) in the WNK1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in WNK1 are known to be pathogenic (PMID: 22910560). -

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

LitVar

Other links and lift over

dbSNP: rs137852734; hg19: chr12-977587;