dbSNP rs116103203: KCNQ1:c.386+16242G>A (chr11-2461726-G-A) – ACMG Classification: Benign (-16 pts)

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_000218.3(KCNQ1):c.386+16242G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000332 in 1,366,530 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0018 ( 2 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

KCNQ1
NM_000218.3 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.528

Variant links:

Genes affected

KCNQ1 (HGNC:6294): (potassium voltage-gated channel subfamily Q member 1) This gene encodes a voltage-gated potassium channel required for repolarization phase of the cardiac action potential. This protein can form heteromultimers with two other potassium channel proteins, KCNE1 and KCNE3. Mutations in this gene are associated with hereditary long QT syndrome 1 (also known as Romano-Ward syndrome), Jervell and Lange-Nielsen syndrome, and familial atrial fibrillation. This gene exhibits tissue-specific imprinting, with preferential expression from the maternal allele in some tissues, and biallelic expression in others. This gene is located in a region of chromosome 11 amongst other imprinted genes that are associated with Beckwith-Wiedemann syndrome (BWS), and itself has been shown to be disrupted by chromosomal rearrangements in patients with BWS. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Aug 2011]

KCNQ1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.93).

BP6

Variant 11-2461726-G-A is Benign according to our data. Variant chr11-2461726-G-A is described in ClinVar as [Benign]. Clinvar id is 178384.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAd4 at 2 AD,AR,Digenic gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNQ1	NM_000218.3 link	c.386+16242G>A		intron_variant	Intron 1 of 15	ENST00000155840.12	NP_000209.2	P51787-1Q96AI9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNQ1	ENST00000155840.12 link	c.386+16242G>A		intron_variant	Intron 1 of 15	1	NM_000218.3	ENSP00000155840.2		P51787-1

Frequencies

GnomAD3 genomes

AF:

0.00177

AC:

270

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00589

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00150

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:

0.000956

GnomAD3 exomes

AF:

0.000455

AC:

113

AN:

248130

Hom.:

AF XY:

0.000372

AC XY:

AN XY:

134272

show subpopulations

Gnomad AFR exome

AF:

0.00622

Gnomad AMR exome

AF:

0.0000871

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000164

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000446

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000152

AC:

184

AN:

1214220

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

AN XY:

601616

show subpopulations

Gnomad4 AFR exome

AF:

0.00521

Gnomad4 AMR exome

AF:

0.0000806

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000596

Gnomad4 SAS exome

AF:

0.0000240

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000231

Gnomad4 OTH exome

AF:

0.000364

GnomAD4 genome

AF:

0.00177

AC:

270

AN:

152310

Hom.:

Cov.:

AF XY:

0.00161

AC XY:

120

AN XY:

74478

show subpopulations

Gnomad4 AFR

AF:

0.00587

Gnomad4 AMR

AF:

0.00150

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:

0.000946

Alfa

AF:

0.000940

Hom.:

Bravo

AF:

0.00190

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

May 18, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

5+12G>A in Intron 01 of KCNQ1: This variant is not expected to have clinical sig nificance because it is not located within the conserved splice consensus sequen ce and has been identified in 0.6% (144/23872) of African chromosomes by the Gen ome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs1161 03203). -

not provided

Benign:1

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.93

CADD

Benign

2.7

DANN

Benign

0.62

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