Genetic Variant KCNE1:c.*167C>A (chr21-34449078-G-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_000219.6(KCNE1):c.*167C>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0 ( 0 hom., cov: 15)

Exomes 𝑓: 0.000016 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

KCNE1
NM_000219.6 3_prime_UTR

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.545

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

long QT syndrome 5
Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: ClinGen, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
Jervell and Lange-Nielsen syndrome 2
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia
Jervell and Lange-Nielsen syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
atrial fibrillation
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

KCNE1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNE1	NM_000219.6 link	c.*167C>A		3_prime_UTR_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.*167C>A		3_prime_UTR_variant	Exon 4 of 4	1	NM_000219.6	ENSP00000382226.2		P15382

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

108526

Hom.:

Cov.:

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000161

AC:

AN:

309788

Hom.:

Cov.:

AF XY:

0.0000185

AC XY:

AN XY:

161746

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

11226

American (AMR)

AF:

0.00

AC:

AN:

14110

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

9258

East Asian (EAS)

AF:

0.000237

AC:

AN:

21088

South Asian (SAS)

AF:

0.00

AC:

AN:

28310

European-Finnish (FIN)

AF:

0.00

AC:

AN:

27622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1390

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

178640

Other (OTH)

AF:

0.00

AC:

AN:

18144

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.235

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

108638

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

52548

African (AFR)

AF:

0.00

AC:

AN:

33500

American (AMR)

AF:

0.00

AC:

AN:

10710

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2398

East Asian (EAS)

AF:

0.00

AC:

AN:

3124

South Asian (SAS)

AF:

0.00

AC:

AN:

3130

European-Finnish (FIN)

AF:

0.00

AC:

AN:

7568

Middle Eastern (MID)

AF:

0.00

AC:

AN:

216

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

46020

Other (OTH)

AF:

0.00

AC:

AN:

1412

Alfa

AF:

0.00

Hom.:

Asia WGS

AF:

0.00173

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

3.9

(source)

DANN

Benign

0.77

PhyloP100

0.55

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over