1-40784242-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_ModerateBP6_Moderate

The NM_004700.4(KCNQ4):​c.149G>A​(p.Ser50Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: not found (cov: 32)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control

Consequence

KCNQ4
NM_004700.4 missense

Scores

2
3
14

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 2.36
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]

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.21713525).
BP6
Variant 1-40784242-G-A is Benign according to our data. Variant chr1-40784242-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 513457.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
KCNQ4NM_004700.4 linkc.149G>A p.Ser50Asn missense_variant Exon 1 of 14 ENST00000347132.10 NP_004691.2 P56696-1B3KQH8
KCNQ4NM_172163.3 linkc.149G>A p.Ser50Asn missense_variant Exon 1 of 13 NP_751895.1 P56696-2B3KQH8
KCNQ4XM_047434057.1 linkc.149G>A p.Ser50Asn missense_variant Exon 1 of 13 XP_047290013.1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
KCNQ4ENST00000347132.10 linkc.149G>A p.Ser50Asn missense_variant Exon 1 of 14 1 NM_004700.4 ENSP00000262916.6 P56696-1
KCNQ4ENST00000509682.6 linkc.149G>A p.Ser50Asn missense_variant Exon 1 of 13 5 ENSP00000423756.2 P56696-2

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Data not reliable, filtered out with message: AC0;AS_VQSR
AF:
0.00
AC:
0
AN:
1206362
Hom.:
0
Cov.:
31
AF XY:
0.00
AC XY:
0
AN XY:
590578
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:
0.00
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Likely benign
Submissions summary: Benign:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not specified Benign:1
Dec 06, 2017
GeneDx
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.29
BayesDel_addAF
Benign
-0.021
T
BayesDel_noAF
Benign
-0.27
CADD
Benign
23
DANN
Uncertain
0.98
DEOGEN2
Benign
0.19
T;T;.
Eigen
Benign
-0.63
Eigen_PC
Benign
-0.56
FATHMM_MKL
Benign
0.68
D
LIST_S2
Benign
0.60
.;T;T
M_CAP
Pathogenic
0.96
D
MetaRNN
Benign
0.22
T;T;T
MetaSVM
Uncertain
0.41
D
MutationAssessor
Benign
0.34
N;N;N
PrimateAI
Pathogenic
0.94
D
PROVEAN
Benign
-0.33
.;N;N
REVEL
Uncertain
0.32
Sift
Benign
0.030
.;D;D
Sift4G
Benign
0.073
.;T;T
Polyphen
0.0
B;B;B
Vest4
0.072, 0.14
MutPred
0.17
Loss of glycosylation at S50 (P = 0.0095);Loss of glycosylation at S50 (P = 0.0095);Loss of glycosylation at S50 (P = 0.0095);
MVP
0.41
MPC
1.1
ClinPred
0.22
T
GERP RS
0.96
Varity_R
0.14
gMVP
0.32

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.

Other links and lift over

dbSNP: rs1553165192; hg19: chr1-41249914; API