NM_004700.4:c.546C>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_004700.4(KCNQ4):c.546C>G(p.Phe182Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000911 in 1,601,810 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000086 ( 0 hom. )

Consequence

KCNQ4
NM_004700.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:1B:3

Conservation

PhyloP100: -0.166

Publications

24 publications found

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 Gene-Disease associations (from GenCC):

autosomal dominant nonsyndromic hearing loss 2A
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
nonsyndromic genetic hearing loss
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
autosomal dominant nonsyndromic hearing loss
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hearing loss disorder
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

KCNQ4 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012645632).

BP6

Variant 1-40818518-C-G is Benign according to our data. Variant chr1-40818518-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 21424.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000138 (21/152266) while in subpopulation EAS AF = 0.00408 (21/5148). AF 95% confidence interval is 0.00273. There are 0 homozygotes in GnomAd4. There are 12 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNQ4	NM_004700.4 link	c.546C>G	p.Phe182Leu	missense_variant	Exon 4 of 14	ENST00000347132.10	NP_004691.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
KCNQ4	ENST00000347132.10 link	c.546C>G	p.Phe182Leu	missense_variant	Exon 4 of 14	1	NM_004700.4	ENSP00000262916.6
KCNQ4	ENST00000509682.6 link	c.546C>G	p.Phe182Leu	missense_variant	Exon 4 of 13	5		ENSP00000423756.2
KCNQ4	ENST00000443478.3 link	c.231C>G	p.Phe77Leu	missense_variant	Exon 3 of 13	5		ENSP00000406735.3

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152150

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:

0.00407

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

GnomAD2 exomes

AF:

0.000329

AC:

AN:

236822

AF XY:

0.000300

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00436

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000862

AC:

125

AN:

1449544

Hom.:

Cov.:

AF XY:

0.0000831

AC XY:

AN XY:

721636

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26112

East Asian (EAS)

AF:

0.00297

AC:

118

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.00

AC:

AN:

41532

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5684

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111826

Other (OTH)

AF:

0.000116

AC:

AN:

60288

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000138

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74436

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41570

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00408

AC:

AN:

5148

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000162

ExAC

AF:

0.000305

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:1Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:2

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 23, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 20966080, 27018795, 30828794, 17033161, 25116015, 23717403, 21951272) -

Autosomal dominant nonsyndromic hearing loss 2A

Pathogenic:1

Aug 20, 2015

ClinVar Staff, National Center for Biotechnology Information (NCBI)

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

not specified

Uncertain:1

May 04, 2022

Mendelics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

KCNQ4-related disorder

Benign:1

Feb 08, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely 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

Pathogenic

0.80

BayesDel_addAF

Benign

-0.074

BayesDel_noAF

Uncertain

0.12

CADD

Benign

(source)

DANN

Benign

0.89

DEOGEN2

Uncertain

0.53

D;D;.

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.038

FATHMM_MKL

Benign

0.46

LIST_S2

Uncertain

0.87

.;D;D

M_CAP

Uncertain

0.094

MetaRNN

Benign

0.013

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-1.5

N;N;N

PhyloP100

-0.17

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

1.3

.;N;N

REVEL

Uncertain

0.50

Sift

Benign

1.0

.;T;T

Sift4G

Benign

1.0

.;T;T

Polyphen

0.11

B;B;B

Vest4

0.77, 0.60

MutPred

0.77

Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);Loss of helix (P = 0.1299);

MVP

0.99

MPC

1.3

ClinPred

0.074

GERP RS

4.1

Varity_R

0.31

gMVP

0.86

Mutation Taster

=11/89

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over