21-34370795-C-T

Position:

chr21-34370795-C-T

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_172201.2(KCNE2):c.317C>T(p.Ser106Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000107 in 1,614,146 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00060 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000056 ( 0 hom. )

Consequence

KCNE2
NM_172201.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: 3.71

Variant links:

Genes affected

KCNE2 (HGNC:6242): (potassium voltage-gated channel subfamily E regulatory subunit 2) Voltage-gated potassium (Kv) channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. This gene encodes a member of the potassium channel, voltage-gated, isk-related subfamily. This member is a small integral membrane subunit that assembles with the KCNH2 gene product, a pore-forming protein, to alter its function. This gene is expressed in heart and muscle and the gene mutations are associated with cardiac arrhythmia. [provided by RefSeq, Jul 2008]

KCNE2 links:

ENSG00000225555 (HGNC:):

ENSG00000225555 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0074215233).

BP6

Variant 21-34370795-C-T is Benign according to our data. Variant chr21-34370795-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 379226.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.

BS2

High AC in GnomAd4 at 91 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNE2	NM_172201.2 linkuse as main transcript	c.317C>T	p.Ser106Leu	missense_variant	2/2	ENST00000290310.4	NP_751951.1	Q9Y6J6
LOC105372791	NR_188571.1 linkuse as main transcript	n.492G>A		non_coding_transcript_exon_variant	2/3
LOC105372791	NR_188572.1 linkuse as main transcript	n.492G>A		non_coding_transcript_exon_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNE2	ENST00000290310.4 linkuse as main transcript	c.317C>T	p.Ser106Leu	missense_variant	2/2	1	NM_172201.2	ENSP00000290310.2		Q9Y6J6
ENSG00000225555	ENST00000440403.2 linkuse as main transcript	n.494G>A		non_coding_transcript_exon_variant	2/3	3

Frequencies

GnomAD3 genomes

AF:

0.000598

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00550

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:

0.0000147

Gnomad OTH

AF:

0.000959

GnomAD3 exomes

AF:

0.000211

AC:

AN:

251396

Hom.:

AF XY:

0.000191

AC XY:

AN XY:

135882

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00136

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000561

AC:

AN:

1461878

Hom.:

Cov.:

AF XY:

0.0000523

AC XY:

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.00145

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:

0.00000809

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.000598

AC:

AN:

152268

Hom.:

Cov.:

AF XY:

0.000792

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.00549

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000949

Alfa

AF:

0.0000444

Hom.:

Bravo

AF:

0.000638

ExAC

AF:

0.0000576

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 13, 2017

The S106L variant of uncertain significance in the KCNE2 gene has been previously reported in one individualreferred for LQTS genetic testing, although no clinical information or segregation data was provided (Lieve et al.,2013). This variant has also been identified in other individuals referred for genetic testing at GeneDx; however, thusfar, segregation data is limited for these individuals due to the lack of clinical information provided and insufficientparticipation by informative family members. This variant is not observed at a significant frequency in largepopulation cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). In addition,S106L is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as theseresidues differ in polarity, charge, size and/or other properties. Nevertheless, S106L occurs at a position that is notconserved across species, and L106 is tolerated in at least two species. Furthermore, the majority of in silico toolspredicts this variant likely does not alter the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is pathogenic or rare benign. -

Long QT syndrome 6

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 06, 2023

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 12, 2022

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

AlphaMissense

Benign

0.096

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Benign

0.75

DEOGEN2

Benign

0.26

Eigen

Benign

-0.56

Eigen_PC

Benign

-0.40

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.78

M_CAP

Benign

0.019

MetaRNN

Benign

0.0074

MetaSVM

Benign

-0.64

MutationAssessor

Benign

0.69

PrimateAI

Benign

0.27

PROVEAN

Benign

-0.17

REVEL

Benign

0.19

Sift

Benign

0.27

Sift4G

Benign

0.19

Polyphen

0.0020

Vest4

0.079

MVP

0.80

MPC

0.13

ClinPred

0.23

GERP RS

5.7

Varity_R

0.069

gMVP

0.74

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