rs778538229

Positions:

chr1-40833031-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_004700.4(KCNQ4):c.1531G>A(p.Val511Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000347 in 1,613,342 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000037 ( 0 hom. )

Consequence

KCNQ4
NM_004700.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.646

Variant links:

Genes affected

KCNQ4 (HGNC:6298): (potassium voltage-gated channel subfamily Q member 4) The protein encoded by this gene forms a potassium channel that is thought to play a critical role in the regulation of neuronal excitability, particularly in sensory cells of the cochlea. The current generated by this channel is inhibited by M1 muscarinic acetylcholine receptors and activated by retigabine, a novel anti-convulsant drug. The encoded protein can form a homomultimeric potassium channel or possibly a heteromultimeric channel in association with the protein encoded by the KCNQ3 gene. Defects in this gene are a cause of nonsyndromic sensorineural deafness type 2 (DFNA2), an autosomal dominant form of progressive hearing loss. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

KCNQ4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.07587561).

BS2

High AC in GnomAdExome4 at 54 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNQ4	NM_004700.4 linkuse as main transcript	c.1531G>A	p.Val511Ile	missense_variant	11/14	ENST00000347132.10	NP_004691.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNQ4	ENST00000347132.10 linkuse as main transcript	c.1531G>A	p.Val511Ile	missense_variant	11/14	1	NM_004700.4	ENSP00000262916	P2	P56696-1
KCNQ4	ENST00000509682.6 linkuse as main transcript	c.1369G>A	p.Val457Ile	missense_variant	10/13	5		ENSP00000423756	A1	P56696-2
KCNQ4	ENST00000443478.3 linkuse as main transcript	c.1114G>A	p.Val372Ile	missense_variant	10/13	5		ENSP00000406735
KCNQ4	ENST00000506017.1 linkuse as main transcript	n.850G>A		non_coding_transcript_exon_variant	8/11	2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250992

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135682

show subpopulations

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:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000370

AC:

AN:

1461148

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

726872

show subpopulations

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:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000468

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000963

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jan 15, 2016

The p.Val511Ile variant in KCNQ4 has not been previously reported in individuals with hearing loss, but has been identified in 1/16510 South Asian chromosomes b y the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs778538229). Although this variant has been seen in the general population, its frequency is not high enough to rule out a pathogenic role. Computational predi ction tools and conservation analyses suggest that the p.Val511Ile variant may n ot impact the protein, though this information is not predictive enough to rule out pathogenicity. Of note, one mammal (Cape elephant shrew) has an isoleucine ( Ile) at this position despite nearby amino acid conservation. In summary, the cl inical significance of the p.Val511Ile variant is uncertain. -

Autosomal dominant nonsyndromic hearing loss 2A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 28, 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. 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 KCNQ4 protein function. ClinVar contains an entry for this variant (Variation ID: 228770). This variant has not been reported in the literature in individuals affected with KCNQ4-related conditions. This variant is present in population databases (rs778538229, gnomAD 0.003%). This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 511 of the KCNQ4 protein (p.Val511Ile). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.068

BayesDel_noAF

Benign

-0.24

CADD

Benign

DANN

Benign

0.59

DEOGEN2

Uncertain

0.52

D;D;.

Eigen

Benign

-0.58

Eigen_PC

Benign

-0.40

FATHMM_MKL

Benign

0.080

LIST_S2

Benign

0.76

.;T;T

M_CAP

Benign

0.052

MetaRNN

Benign

0.076

T;T;T

MetaSVM

Uncertain

0.48

MutationAssessor

Benign

0.035

N;N;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.34

PROVEAN

Benign

-0.22

.;N;N

REVEL

Uncertain

0.37

Sift

Benign

0.54

.;T;T

Sift4G

Benign

0.70

.;T;T

Polyphen

0.020

B;B;B

Vest4

0.077, 0.093

MutPred

0.33

Gain of methylation at K515 (P = 0.1531);Gain of methylation at K515 (P = 0.1531);.;

MVP

0.36

MPC

0.10

ClinPred

0.063

GERP RS

4.6

Varity_R

0.046

gMVP

0.14

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over