rs750478389

Positions:

• chr12-882027-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PP2

The NM_018979.4(WNK1):​c.3326G>A​(p.Arg1109His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,732 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: WNK1 NM_018979.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 9.31

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]

WNK1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), WNK1. . Gene score misZ 2.1626 (greater than the threshold 3.09). Trascript score misZ 4.652 (greater than threshold 3.09). GenCC has associacion of gene with neuropathy, hereditary sensory and autonomic, type 2A, hereditary sensory and autonomic neuropathy type 2, pseudohypoaldosteronism type 2C.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
WNK1	NM_213655.5	c.4082G>A	p.Arg1361His	missense_variant	14/28	ENST00000340908.9	NP_998820.3
WNK1	NM_018979.4	c.3326G>A	p.Arg1109His	missense_variant	14/28	ENST00000315939.11	NP_061852.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
WNK1	ENST00000340908.9	c.4082G>A	p.Arg1361His	missense_variant	14/28	5	NM_213655.5	ENSP00000341292.5
WNK1	ENST00000315939.11	c.3326G>A	p.Arg1109His	missense_variant	14/28	1	NM_018979.4	ENSP00000313059.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250634 Hom.: 0 AF XY: 0.00000738 AC XY: 1 AN XY: 135514

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461732 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727162

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00000450

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000936 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

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

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Apr 17, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 19, 2023	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. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. ClinVar contains an entry for this variant (Variation ID: 471178). This variant has not been reported in the literature in individuals affected with WNK1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1361 of the WNK1 protein (p.Arg1361His). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.56
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T;.;D;.;.;D
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D;D
M_CAP	Benign	0.035	D
MetaRNN	Uncertain	0.59	D;D;D;D;D;D
MetaSVM	Uncertain	-0.092	T
MutationAssessor	Uncertain	2.8	.;.;M;.;.;.
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-3.4	D;.;D;.;D;D
REVEL	Uncertain	0.47
Sift	Uncertain	0.0020	D;.;D;.;D;D
Sift4G	Benign	0.089	T;.;D;D;D;D
Polyphen		1.0	D;.;D;.;.;.
Vest4		0.65
MutPred		0.23		.;.;Loss of methylation at R1109 (P = 0.0398);.;.;.;
MVP		0.53
MPC		0.63
ClinPred		0.98	D
GERP RS		5.9
Varity_R		0.42
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs750478389; hg19: chr12-991193;