21-34449647-G-T

Variant names:

• chr21-34449647-G-T
• rs745925445
• NM_000219.6:c.-13C>A

Variant summary

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

The NM_000219.6(KCNE1):​c.-13C>A variant causes a 5 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: not found (cov: 13)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KCNE1 NM_000219.6 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.192
• Publications: 0 publications found

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

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNE1	NM_000219.6	c.-13C>A		5_prime_UTR_variant	Exon 4 of 4	ENST00000399286.3	NP_000210.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNE1	ENST00000399286.3	c.-13C>A		5_prime_UTR_variant	Exon 4 of 4	1	NM_000219.6	ENSP00000382226.2

Frequencies

GnomAD3 genomes Cov.: 13

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 719894 Hom.: 0 Cov.: 9 AF XY: 0.00 AC XY: 0 AN XY: 371154

African (AFR) AF: 0.00 AC: 0 AN: 17636

American (AMR) AF: 0.00 AC: 0 AN: 31404

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 17648

East Asian (EAS) AF: 0.00 AC: 0 AN: 32492

South Asian (SAS) AF: 0.00 AC: 0 AN: 60000

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 39496

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3250

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 482870

Other (OTH) AF: 0.00 AC: 0 AN: 35098

GnomAD4 genome Cov.: 13

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	5.7
DANN	Benign	0.84
PhyloP100		0.19

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs745925445; hg19: chr21-35821945;