Variant rs55737429 details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PM5PP3

The NM_004700.4(KCNQ4):c.841T>A(p.Leu281Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,460,988 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L281S) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

KCNQ4
NM_004700.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.26

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM1

In a intramembrane_region Pore-forming; Name=Segment H5 (size 21) in uniprot entity KCNQ4_HUMAN there are 11 pathogenic changes around while only 1 benign (92%) in NM_004700.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-40819882-T-C is described in Lovd as [Pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.828

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNQ4	NM_004700.4 linkuse as main transcript	c.841T>A	p.Leu281Met	missense_variant	6/14	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.841T>A	p.Leu281Met	missense_variant	6/14	1	NM_004700.4	ENSP00000262916	P2	P56696-1
KCNQ4	ENST00000509682.6 linkuse as main transcript	c.841T>A	p.Leu281Met	missense_variant	6/13	5		ENSP00000423756	A1	P56696-2
KCNQ4	ENST00000443478.3 linkuse as main transcript	c.529T>A	p.Leu177Met	missense_variant	5/13	5		ENSP00000406735
KCNQ4	ENST00000506017.1 linkuse as main transcript	n.160T>A		non_coding_transcript_exon_variant	3/11	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251490

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135918

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1460988

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726880

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.81

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.26

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.76

D;D;.

Eigen

Benign

-0.040

Eigen_PC

Benign

-0.057

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.91

.;D;D

M_CAP

Pathogenic

0.50

MetaRNN

Pathogenic

0.83

D;D;D

MetaSVM

Pathogenic

0.90

MutationAssessor

Benign

1.1

L;L;L

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

-1.9

.;N;N

REVEL

Pathogenic

0.74

Sift

Uncertain

0.0010

.;D;D

Sift4G

Uncertain

0.041

.;D;D

Polyphen

1.0

D;D;D

Vest4

0.76, 0.72

MutPred

0.55

Loss of catalytic residue at L281 (P = 0.007);Loss of catalytic residue at L281 (P = 0.007);Loss of catalytic residue at L281 (P = 0.007);

MVP

0.95

MPC

2.3

ClinPred

0.86

GERP RS

2.8

Varity_R

0.71

gMVP

0.94

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over