21-34226827-C-T

Variant names:

• chr21-34226827-C-T
• rs9982601
• ENST00000715813.1:c.-2650-35993C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The ENST00000715813.1(KCNE2):​c.-2650-35993C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.15 in 152,156 control chromosomes in the GnomAD database, including 2,004 homozygotes. 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: 𝑓 0.15 (2004 hom., cov: 32)
• Consequence: KCNE2 ENST00000715813.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.430
• Publications: 142 publications found

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]

MRPS6 (HGNC:14051): (mitochondrial ribosomal protein S6) Mammalian mitochondrial ribosomal proteins are encoded by nuclear genes and help in protein synthesis within the mitochondrion. Mitochondrial ribosomes (mitoribosomes) consist of a small 28S subunit and a large 39S subunit. They have an estimated 75% protein to rRNA composition compared to prokaryotic ribosomes, where this ratio is reversed. Another difference between mammalian mitoribosomes and prokaryotic ribosomes is that the latter contain a 5S rRNA. Among different species, the proteins comprising the mitoribosome differ greatly in sequence, and sometimes in biochemical properties, which prevents easy recognition by sequence homology. This gene encodes a 28S subunit protein that belongs to the ribosomal protein S6P family. Pseudogenes corresponding to this gene are found on chromosomes 1p and 12q. [provided by RefSeq, Jul 2008]

LINC00310 (HGNC:16414): (long intergenic non-protein coding RNA 310)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.228 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000715813.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
There are no transcript annotations for this variant.

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNE2	ENST00000715813.1		c.-2650-35993C>T		intron	N/A	ENSP00000520524.1	Q9Y6J6
	MRPS6	ENST00000362077.5	TSL:3	n.226+11287C>T		intron	N/A	ENSP00000520522.1	A0ABB0MUY8
	LINC00310	ENST00000427022.1	TSL:3	n.311+11287C>T		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.150 AC: 22827 AN: 152038 Hom.: 2001 Cov.: 32

Gnomad AFR AF: 0.232

Gnomad AMI AF: 0.121

Gnomad AMR AF: 0.103

Gnomad ASJ AF: 0.118

Gnomad EAS AF: 0.000578

Gnomad SAS AF: 0.0664

Gnomad FIN AF: 0.138

Gnomad MID AF: 0.0791

Gnomad NFE AF: 0.134

Gnomad OTH AF: 0.131

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

GnomAD4 genome AF: 0.150 AC: 22855 AN: 152156 Hom.: 2004 Cov.: 32 AF XY: 0.146 AC XY: 10891 AN XY: 74366

African (AFR) AF: 0.232 AC: 9612 AN: 41486

American (AMR) AF: 0.102 AC: 1565 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.118 AC: 408 AN: 3472

East Asian (EAS) AF: 0.000579 AC: 3 AN: 5182

South Asian (SAS) AF: 0.0664 AC: 320 AN: 4818

European-Finnish (FIN) AF: 0.138 AC: 1459 AN: 10598

Middle Eastern (MID) AF: 0.0748 AC: 22 AN: 294

European-Non Finnish (NFE) AF: 0.134 AC: 9082 AN: 67996

Other (OTH) AF: 0.130 AC: 274 AN: 2110

Alfa AF: 0.134 Hom.: 4498

Bravo AF: 0.150

Asia WGS AF: 0.0390 AC: 135 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.94
DANN	Benign	0.42
PhyloP100		-0.43
Mutation Taster		=100/0	polymorphism

Splicing

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: rs9982601;

hg19: chr21-35599128;