12-753306-G-T

Variant names:

• chr12-753306-G-T
• rs886049864
• NM_213655.5:c.-260G>T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_018979.4(WNK1):​c.-260G>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000148 in 542,240 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000015 (1 hom.)
• Consequence: WNK1 NM_018979.4 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.331

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 Likely_benign. Variant got -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.51).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
WNK1	NM_213655.5	c.-260G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 28	ENST00000340908.9	NP_998820.3
WNK1	NM_018979.4	c.-260G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 28	ENST00000315939.11	NP_061852.3
WNK1	NM_213655.5	c.-260G>T		5_prime_UTR_variant	Exon 1 of 28	ENST00000340908.9	NP_998820.3
WNK1	NM_018979.4	c.-260G>T		5_prime_UTR_variant	Exon 1 of 28	ENST00000315939.11	NP_061852.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
WNK1	ENST00000340908	c.-260G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 28	5	NM_213655.5	ENSP00000341292.5
WNK1	ENST00000315939	c.-260G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 28	1	NM_018979.4	ENSP00000313059.6
WNK1	ENST00000340908	c.-260G>T		5_prime_UTR_variant	Exon 1 of 28	5	NM_213655.5	ENSP00000341292.5
WNK1	ENST00000315939	c.-260G>T		5_prime_UTR_variant	Exon 1 of 28	1	NM_018979.4	ENSP00000313059.6

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151480 Hom.: 0 Cov.: 31

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: 0.000416

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000154 AC: 6 AN: 390760 Hom.: 1 Cov.: 4 AF XY: 0.0000290 AC XY: 6 AN XY: 206656

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: 0.000145

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151480 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 73964

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000416

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pseudohypoaldosteronism type 2C Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.51
CADD	Benign	16
DANN	Benign	0.94

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: rs886049864; hg19: chr12-862472;