21-34449605-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_000219.6(KCNE1):c.30G>A(p.Thr10Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T10T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000099 ( 0 hom., cov: 13)

Exomes 𝑓: 0.00021 ( 3 hom. )

Consequence

KCNE1
NM_000219.6 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11O:1

Conservation

PhyloP100: -1.94

Variant links:

Genes affected

KCNE1 (HGNC:6240): (potassium voltage-gated channel subfamily E regulatory subunit 1) The product of this gene belongs to the potassium channel KCNE family. Potassium ion channels are essential to many cellular functions and show a high degree of diversity, varying in their electrophysiologic and pharmacologic properties. This gene encodes a transmembrane protein known to associate with the product of the KVLQT1 gene to form the delayed rectifier potassium channel. Mutation in this gene are associated with both Jervell and Lange-Nielsen and Romano-Ward forms of long-QT syndrome. Alternatively spliced transcript variants encoding the same protein have been identified. [provided by RefSeq, Jul 2008]

KCNE1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.73).

BP6

Variant 21-34449605-C-T is Benign according to our data. Variant chr21-34449605-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 163730.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr21-34449605-C-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-1.94 with no splicing effect.

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR,Digenic gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNE1	NM_000219.6 link	c.30G>A	p.Thr10Thr	synonymous_variant	Exon 4 of 4	ENST00000399286.3	NP_000210.2	P15382C7S316Q6FHJ6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNE1	ENST00000399286.3 link	c.30G>A	p.Thr10Thr	synonymous_variant	Exon 4 of 4	1	NM_000219.6	ENSP00000382226.2		P15382

Frequencies

GnomAD3 genomes

AF:

0.000110

AC:

AN:

91292

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000895

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00226

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000472

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000521

AC:

131

AN:

251232

Hom.:

AF XY:

0.000530

AC XY:

AN XY:

135848

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00582

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.000231

Gnomad NFE exome

AF:

0.0000792

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000213

AC:

175

AN:

822548

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

422140

show subpopulations

Gnomad4 AFR exome

AF:

0.000298

Gnomad4 AMR exome

AF:

0.0000808

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00243

Gnomad4 SAS exome

AF:

0.000187

Gnomad4 FIN exome

AF:

0.0000941

Gnomad4 NFE exome

AF:

0.0000904

Gnomad4 OTH exome

AF:

0.000416

GnomAD4 genome

AF:

0.0000985

AC:

AN:

91360

Hom.:

Cov.:

AF XY:

0.0000907

AC XY:

AN XY:

44092

show subpopulations

Gnomad4 AFR

AF:

0.0000892

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00189

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000472

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000117

Hom.:

Asia WGS

AF:

0.00289

AC:

AN:

3478

EpiCase

AF:

0.000327

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Mar 11, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:2

Oct 06, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.Thr10Thr in exon 3 of KCNE1: This variant is not expected to have clinical sig nificance because it does not alter an amino acid residue, it is not located wit hin the splice consensus sequence, and it has been identified in 0.5% (39/8618) of East Asian chromosomes by the Exome Aggregation Consortium (ExAC, http://exac .broadinstitute.org; dbSNP rs187686559). -

Feb 02, 2015

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Long QT syndrome 5

Benign:1Other:1

Roden Lab, Vanderbilt University Medical Center

Significance: not provided

Review Status: no classification provided

Collection Method: in vitro

- -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

KCNE1-related disorder

Benign:1

Dec 15, 2020

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Jervell and Lange-Nielsen syndrome 2

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Congenital long QT syndrome

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Long QT syndrome

Benign:1

Jan 19, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Apr 06, 2017

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.73

CADD

Benign

1.1

DANN

Benign

0.45

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