rs179436

Variant names:

• chr11-2532919-A-G
• rs179436
• NM_000218.3:c.477+4901A>G

Your query was ambiguous. Multiple possible variants found:

• chr11-2532919-A-G
• chr11-2532919-A-C
• chr11-2532919-A-T

GermlineCancer (beta)

Variant summary

Our verdict is Benign.

<-10 Benign

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received -14 classification points (ACMG Germline Pathogenicity v2019). BA1BP4_StrongBP6_Moderate

The NM_000218.3(KCNQ1):c.477+4901A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a cumulative frequency of 0.803 (AC=122,183) in the gnomAD database across 152,096 control chromosomes, including 49,407 homozygotes. The grpmax filtering allele frequency (95% CI) is 0.952. In-silico predictor (BayesDel (noAF)) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign/Likely Benign (★).

• Frequency: Genomes: 𝑓 0.80 (49407 hom., cov: 33)
• Consequence: KCNQ1 NM_000218.3 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.30
• Publications: 6 publications found

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 Gene-Disease associations (from GenCC):

• long QT syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Jervell and Lange-Nielsen syndrome

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Jervell and Lange-Nielsen syndrome 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• long QT syndrome 1

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• atrial fibrillation, familial, 3

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• short QT syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet
• short QT syndrome type 2

  Inheritance: AD Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• familial atrial fibrillation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Jervell and Lange-Nielsen syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• familial hypertrophic cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: G2P
• hypertrophic cardiomyopathy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

Classification according to ACMG Germline Pathogenicity v2019

Specifications for KCNQ1 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Benign. The variant received -14 points.

• BP4: Computational evidence supports benign — no pathogenic computational or splicing signal (BP4); Splicing verdict: benign (Strong).; Germline computational verdict: benign (Strong).
• BP6: ClinVar 1-star benign — moderate (BP6); ClinVar germline classification: Benign/Likely Benign, 1 star(s).
• BA1: GnomAD effective popmax AF >5% — BA1 stand-alone benign; GnomAD reliable popmax AF = 0.9523 — exceeds 5%% threshold (BA1 applied)

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_000218.3. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNQ1	NM_000218.3	MANE Select	c.477+4901A>G		intron	N/A	NP_000209.2
	KCNQ1	NM_001406836.1		c.477+4901A>G		intron	N/A	NP_001393765.1
	KCNQ1	NM_001406837.1		c.207+4901A>G		intron	N/A	NP_001393766.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNQ1	ENST00000155840.12	TSL:1 MANE Select	c.477+4901A>G		intron	N/A	ENSP00000155840.2	P51787-1
	KCNQ1	ENST00000335475.6	TSL:1	c.96+4901A>G		intron	N/A	ENSP00000334497.5	P51787-2
	KCNQ1	ENST00000910997.1		c.477+4901A>G		intron	N/A	ENSP00000581056.1	A0ACI8SIJ2

Frequencies

GnomAD3 genomes AF: 0.803 AC: 122078 AN: 151978 Hom.: 49357 Cov.: 33

Gnomad AFR AF: 0.713

Gnomad AMI AF: 0.901

Gnomad AMR AF: 0.850

Gnomad ASJ AF: 0.765

Gnomad EAS AF: 0.975

Gnomad SAS AF: 0.815

Gnomad FIN AF: 0.847

Gnomad MID AF: 0.772

Gnomad NFE AF: 0.828

Gnomad OTH AF: 0.802

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.803 AC: 122183 AN: 152096 Hom.: 49407 Cov.: 33 AF XY: 0.807 AC XY: 60023 AN XY: 74348

African (AFR) AF: 0.714 AC: 29593 AN: 41458

American (AMR) AF: 0.850 AC: 13006 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.765 AC: 2652 AN: 3466

East Asian (EAS) AF: 0.975 AC: 4997 AN: 5126

South Asian (SAS) AF: 0.815 AC: 3932 AN: 4824

European-Finnish (FIN) AF: 0.847 AC: 8987 AN: 10606

Middle Eastern (MID) AF: 0.765 AC: 225 AN: 294

European-Non Finnish (NFE) AF: 0.828 AC: 56276 AN: 68002

Other (OTH) AF: 0.804 AC: 1695 AN: 2108

Alfa AF: 0.817 Hom.: 64509

Bravo AF: 0.801

Asia WGS AF: 0.903 AC: 3138 AN: 3478

Local populations

ToMMo 61KJPN (+60KJPN MNV) AF: 0.993 AC: 121815 AN: 122669

Turkish Variome AF: 0.780 AC: 1206 AN: 1546 Hom.: 477

WBBC (Westlake BioBank for Chinese) pilot AF: 0.969 AC: 8685 AN: 8960 Hom.: 4213

ABraOM SABE-WGS-1171 AF: 0.811 AC: 1900 AN: 2342 Hom.: 783

ClinVar

ClinVar submissions

Significance: Benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Long QT syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.36
DANN	Benign	0.67
PhyloP100		-1.3
Mutation Taster		=100/0	polymorphism (auto)

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs179436;

hg19: chr11-2554149;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar