rs397515637

Positions:

• chr11-2775998-GCAGTAC-GGTTGAGA

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PVS1 PS1 PM2 PP5

The NM_000218.3(KCNQ1):​c.1630_1635delCAGTACinsGTTGAGA​(p.Gln544fs) variant causes a frameshift, missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Pathogenicin Lovd. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: KCNQ1 NM_000218.3 frameshift, missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 8.71

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]

ACMG classification

Verdict is Pathogenic. Variant got 15 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PS1: Transcript NM_000218.3 (KCNQ1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in Lovd
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-2775999-CAGTAC-GTTGAGA is Pathogenic according to our data. Variant chr11-2775999-CAGTAC-GTTGAGA is described in ClinVar as [Pathogenic]. Clinvar id is 52999.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNQ1	NM_000218.3	c.1630_1635delCAGTACinsGTTGAGA	p.Gln544fs	frameshift_variant, missense_variant	13/16	ENST00000155840.12	NP_000209.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNQ1	ENST00000155840.12	c.1630_1635delCAGTACinsGTTGAGA	p.Gln544fs	frameshift_variant, missense_variant	13/16	1	NM_000218.3	ENSP00000155840.2
KCNQ1	ENST00000335475.6	c.1249_1254delCAGTACinsGTTGAGA	p.Gln417fs	frameshift_variant, missense_variant	13/16	1		ENSP00000334497.5
KCNQ1	ENST00000496887.7	c.1273_1278delCAGTACinsGTTGAGA	p.Gln425fs	frameshift_variant, missense_variant	13/16	5		ENSP00000434560.2
KCNQ1	ENST00000646564.2	c.1090_1095delCAGTACinsGTTGAGA	p.Gln364fs	frameshift_variant, missense_variant	8/11			ENSP00000495806.2

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Jervell and Lange-Nielsen syndrome 1 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 01, 1997

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs397515637; hg19: chr11-2797229;