dbSNP rs1647181355: KCNQ4:p.Pro42Arg (chr1-40784218-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004700.4(KCNQ4):c.125C>G(p.Pro42Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000196 in 1,021,418 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign 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. P42L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000020 ( 0 hom. )

Consequence

KCNQ4
NM_004700.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.0930

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 Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1870431).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNQ4	NM_004700.4 link	c.125C>G	p.Pro42Arg	missense_variant	Exon 1 of 14	ENST00000347132.10	NP_004691.2	P56696-1B3KQH8
KCNQ4	NM_172163.3 link	c.125C>G	p.Pro42Arg	missense_variant	Exon 1 of 13		NP_751895.1	P56696-2B3KQH8
KCNQ4	XM_047434057.1 link	c.125C>G	p.Pro42Arg	missense_variant	Exon 1 of 13		XP_047290013.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNQ4	ENST00000347132.10 link	c.125C>G	p.Pro42Arg	missense_variant	Exon 1 of 14	1	NM_004700.4	ENSP00000262916.6		P56696-1
KCNQ4	ENST00000509682.6 link	c.125C>G	p.Pro42Arg	missense_variant	Exon 1 of 13	5		ENSP00000423756.2		P56696-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000196

AC:

AN:

1021418

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

488210

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:

0.00000226

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

Benign

0.10

BayesDel_addAF

Uncertain

0.025

BayesDel_noAF

Benign

-0.20

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.19

T;T;.

Eigen

Benign

-0.58

Eigen_PC

Benign

-0.50

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.52

.;T;T

M_CAP

Pathogenic

0.98

MetaRNN

Benign

0.19

T;T;T

MetaSVM

Uncertain

0.62

MutationAssessor

Benign

0.34

N;N;N

PrimateAI

Pathogenic

0.92

PROVEAN

Benign

0.12

.;N;N

REVEL

Benign

0.29

Sift

Uncertain

0.012

.;D;D

Sift4G

Benign

0.16

.;T;T

Polyphen

0.0

B;B;B

Vest4

0.062, 0.072

MutPred

0.22

Gain of MoRF binding (P = 0.0161);Gain of MoRF binding (P = 0.0161);Gain of MoRF binding (P = 0.0161);

MVP

0.25

MPC

1.2

ClinPred

0.074

GERP RS

1.9

Varity_R

0.10

gMVP

0.47

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over