1-40784269-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_004700.4(KCNQ4):c.176C>T(p.Pro59Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000104 in 1,512,498 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P59S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000093 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 2 hom. )

Consequence

KCNQ4
NM_004700.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.140

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 Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0056022704).

BP6

Variant 1-40784269-C-T is Benign according to our data. Variant chr1-40784269-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 730845.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.0000926 (14/151142) while in subpopulation AMR AF= 0.000921 (14/15194). AF 95% confidence interval is 0.000556. There are 0 homozygotes in gnomad4. There are 8 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
KCNQ4	NM_004700.4 linkuse as main transcript	c.176C>T	p.Pro59Leu	missense_variant	1/14	ENST00000347132.10
KCNQ4	NM_172163.3 linkuse as main transcript	c.176C>T	p.Pro59Leu	missense_variant	1/13
KCNQ4	XM_047434057.1 linkuse as main transcript	c.176C>T	p.Pro59Leu	missense_variant	1/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KCNQ4	ENST00000347132.10 linkuse as main transcript	c.176C>T	p.Pro59Leu	missense_variant	1/14	1	NM_004700.4	P2	P56696-1
KCNQ4	ENST00000509682.6 linkuse as main transcript	c.176C>T	p.Pro59Leu	missense_variant	1/13	5		A1	P56696-2

Frequencies

GnomAD3 genomes

AF:

0.0000927

AC:

AN:

151032

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000923

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00101

AC:

121

AN:

119742

Hom.:

AF XY:

0.000623

AC XY:

AN XY:

67464

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00573

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000105

AC:

143

AN:

1361356

Hom.:

Cov.:

AF XY:

0.0000758

AC XY:

AN XY:

672996

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00432

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:

0.00

Gnomad4 OTH exome

AF:

0.0000535

GnomAD4 genome

AF:

0.0000926

AC:

AN:

151142

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

73834

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000921

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000416

ExAC

AF:

0.000414

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 20, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Invitae	Dec 11, 2023	- -

Autosomal dominant nonsyndromic hearing loss 2A

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

KCNQ4-related disorder

Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 03, 2020

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.14

Cadd

Benign

Dann

Uncertain

0.98

DEOGEN2

Benign

0.22

T;T;.

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.49

MetaRNN

Benign

0.0056

T;T;T

MetaSVM

Uncertain

0.77

MutationAssessor

Benign

1.1

L;L;L

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.93

Polyphen

0.79

P;P;P

Vest4

0.20, 0.25

MutPred

0.26

Loss of relative solvent accessibility (P = 0.0306);Loss of relative solvent accessibility (P = 0.0306);Loss of relative solvent accessibility (P = 0.0306);

MVP

0.78

MPC

2.3

ClinPred

0.17

GERP RS

2.3

Varity_R

0.076

gMVP

0.56

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