20-45095330-C-T

Variant names:

Variant summary

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

The NM_001322799.2(KCNS1):c.1121G>A(p.Arg374His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000108 in 1,612,090 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

KCNS1
NM_001322799.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.74

Variant links:

Genes affected

KCNS1 (HGNC:6300): (potassium voltage-gated channel modifier subfamily S member 1) Voltage-gated potassium channels form the largest and most diversified class of ion channels and are present in both excitable and nonexcitable cells. Their main functions are associated with the regulation of the resting membrane potential and the control of the shape and frequency of action potentials. The alpha subunits are of 2 types: those that are functional by themselves and those that are electrically silent but capable of modulating the activity of specific functional alpha subunits. The protein encoded by this gene is not functional by itself but can form heteromultimers with member 1 and with member 2 (and possibly other members) of the Shab-related subfamily of potassium voltage-gated channel proteins. This gene belongs to the S subfamily of the potassium channel family. [provided by RefSeq, Jul 2008]

KCNS1 links:

Genome browser will be placed here

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=0.22428596).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNS1	NM_001322799.2 link	c.1121G>A	p.Arg374His	missense_variant	Exon 4 of 4	ENST00000537075.3	NP_001309728.1	Q96KK3A2RUL8
KCNS1	NM_002251.5 link	c.1121G>A	p.Arg374His	missense_variant	Exon 5 of 5		NP_002242.2	Q96KK3A2RUL8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNS1	ENST00000537075.3 link	c.1121G>A	p.Arg374His	missense_variant	Exon 4 of 4	1	NM_001322799.2	ENSP00000445595.1		Q96KK3
KCNS1	ENST00000306117.5 link	c.1121G>A	p.Arg374His	missense_variant	Exon 5 of 5	1		ENSP00000307694.1		Q96KK3

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152140

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:

0.00

Gnomad SAS

AF:

0.000830

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000443

AC:

AN:

248516

Hom.:

AF XY:

0.0000446

AC XY:

AN XY:

134394

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:

0.000164

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000535

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000112

AC:

164

AN:

1459832

Hom.:

Cov.:

AF XY:

0.000114

AC XY:

AN XY:

726094

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000202

Gnomad4 SAS exome

AF:

0.000313

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000109

Gnomad4 OTH exome

AF:

0.0000829

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000831

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000963

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000577

AC:

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000594

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1121G>A (p.R374H) alteration is located in exon 5 (coding exon 3) of the KCNS1 gene. This alteration results from a G to A substitution at nucleotide position 1121, causing the arginine (R) at amino acid position 374 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.050

BayesDel_noAF

Uncertain

-0.050

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.44

T;T

Eigen

Benign

-0.011

Eigen_PC

Benign

0.20

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.87

.;D

M_CAP

Benign

0.042

MetaRNN

Benign

0.22

T;T

MetaSVM

Uncertain

0.50

MutationAssessor

Benign

0.95

L;L

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-0.62

N;N

REVEL

Uncertain

0.38

Sift

Benign

0.33

T;T

Sift4G

Benign

0.28

T;T

Polyphen

0.15

B;B

Vest4

0.42

MVP

0.95

ClinPred

0.15

GERP RS

5.8

Varity_R

0.16

gMVP

0.85

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over