1-40820153-C-G

Variant names:

Variant summary

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

The NM_004700.4(KCNQ4):c.946-12C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000337 in 1,601,478 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.00056 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00031 ( 6 hom. )

Consequence

KCNQ4
NM_004700.4 intron

Scores

Splicing: ADA: 0.0003396

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.571

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 (BayesDel_noAF=-0.82).

BP6

Variant 1-40820153-C-G is Benign according to our data. Variant chr1-40820153-C-G is described in ClinVar as [Benign]. Clinvar id is 505423.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000565 (86/152316) while in subpopulation EAS AF= 0.0158 (82/5178). AF 95% confidence interval is 0.0131. There are 1 homozygotes in gnomad4. There are 48 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 86 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNQ4	NM_004700.4 link	c.946-12C>G		intron_variant	Intron 6 of 13	ENST00000347132.10	NP_004691.2	P56696-1B3KQH8

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
KCNQ4	ENST00000347132.10 link	c.946-12C>G	intron_variant	Intron 6 of 13	1	NM_004700.4	ENSP00000262916.6	P56696-1
KCNQ4	ENST00000509682.6 link	c.946-12C>G	intron_variant	Intron 6 of 12	5		ENSP00000423756.2	P56696-2
KCNQ4	ENST00000443478.3 link	c.631-12C>G	intron_variant	Intron 5 of 12	5		ENSP00000406735.3	H0Y6N7
KCNQ4	ENST00000506017.1 link	n.265-12C>G	intron_variant	Intron 3 of 10	2

Frequencies

GnomAD3 genomes

AF:

0.000565

AC:

AN:

152198

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:

0.0158

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.00149

AC:

344

AN:

230246

Hom.:

AF XY:

0.00139

AC XY:

173

AN XY:

124570

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000615

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0199

Gnomad SAS exome

AF:

0.0000702

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000702

GnomAD4 exome

AF:

0.000313

AC:

454

AN:

1449162

Hom.:

Cov.:

AF XY:

0.000314

AC XY:

226

AN XY:

720270

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000465

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0100

Gnomad4 SAS exome

AF:

0.000177

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.05e-7

Gnomad4 OTH exome

AF:

0.000768

GnomAD4 genome

AF:

0.000565

AC:

AN:

152316

Hom.:

Cov.:

AF XY:

0.000644

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0158

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000256

Hom.:

Bravo

AF:

0.000521

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Dec 07, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 06, 2023

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

See Variant Classification Assertion Criteria. -

not specified

Benign:1

Nov 01, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

c.946-12C>G in intron 6 of KCNQ4: This variant is not expected to have clinical significance because it has been identified in 2.5% (112/4416) of East Asian chr omosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.o rg; dbSNP rs146802754). -

Autosomal dominant nonsyndromic hearing loss 2A

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

8.2

DANN

Benign

0.66

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00034

dbscSNV1_RF

Benign

0.028

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