rs144292256

chr12-878308-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 1P and 2B. PP2 BP4_Moderate

The NM_213655.5(WNK1):c.3814G>A(p.Val1272Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000527 in 1,461,758 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.000053 (0 hom.)
• Consequence: WNK1 NM_213655.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 0.852

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 -1 ACMG points.

• PP2: Missense variant where missense usually causes diseases, WNK1
• BP4: Computational evidence support a benign effect (MetaRNN=0.07793826).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WNK1	NM_213655.5	c.3814G>A	p.Val1272Met	missense_variant	12/28	ENST00000340908.9
WNK1	NM_018979.4	c.2320G>A	p.Val774Met	missense_variant	10/28	ENST00000315939.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WNK1	ENST00000340908.9	c.3814G>A	p.Val1272Met	missense_variant	12/28	5	NM_213655.5	A2
WNK1	ENST00000315939.11	c.2320G>A	p.Val774Met	missense_variant	10/28	1	NM_018979.4	P2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.0000239 AC: 6 AN: 251440 Hom.: 0 AF XY: 0.0000294 AC XY: 4 AN XY: 135888

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000527 AC: 77 AN: 1461758 Hom.: 0 Cov.: 29 AF XY: 0.0000399 AC XY: 29 AN XY: 727178

Gnomad4 AFR exome AF: 0.0000299

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: 0.0000639

Gnomad4 OTH exome AF: 0.0000662

GnomAD4 genome Cov.: 31

Alfa AF: 0.0000847 Hom.: 0

Bravo AF: 0.00000378

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.0000247 AC: 3

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Pseudohypoaldosteronism type 2C Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Johns Hopkins Genomics, Johns Hopkins University

Sep 03, 2020

This WNK1 variant (rs144292256) is rare (<0.1%) in a large population dataset (gnomAD: 6/251440 total alleles; 0.002%; no homozygotes) and has not been reported in the literature, to our knowledge. This variant has been reported in ClinVar. Of three bioinformatics tools queried, two predict that the substitution would be tolerated, while one predicts that it would be damaging. The valine residue at this position is poorly conserved across the species assessed. Due to insufficient evidence, we consider the clinical significance of c.2320G>A to be uncertain at this time. -

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 02, 2022

The c.3814G>A (p.V1272M) alteration is located in exon 12 (coding exon 12) of the WNK1 gene. This alteration results from a G to A substitution at nucleotide position 3814, causing the valine (V) at amino acid position 1272 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

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

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 04, 2023

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 1272 of the WNK1 protein (p.Val1272Met). This variant is present in population databases (rs144292256, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with WNK1-related conditions. ClinVar contains an entry for this variant (Variation ID: 538522). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt WNK1 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.40
Cadd	Benign	17
Dann	Uncertain	0.98
DEOGEN2	Benign	0.098	T;.;T;.;.;.;.
Eigen	Benign	-0.60
Eigen_PC	Benign	-0.53
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.85	D;D;D;D;D;D;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.055	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-1.6	N;.;N;.;N;N;.
REVEL	Benign	0.042
Sift	Uncertain	0.0010	D;.;D;.;D;T;.
Sift4G	Benign	0.070	T;.;T;T;T;D;D
Polyphen		0.015	B;.;B;.;.;.;.
Vest4		0.090
MVP		0.15
MPC		0.12
ClinPred		0.073	T
GERP RS		0.96
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.045
gMVP		0.097

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs144292256; hg19: chr12-987474;