21-34370747-A-G

Variant names:

• chr21-34370747-A-G
• rs199473366
• NM_172201.2:c.269A>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_172201.2(KCNE2):​c.269A>G​(p.Glu90Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as not provided (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KCNE2 NM_172201.2 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 4.14

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]

ENSG00000225555 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.311492).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNE2	NM_172201.2	c.269A>G	p.Glu90Gly	missense_variant	Exon 2 of 2	ENST00000290310.4	NP_751951.1
LOC105372791	NR_188571.1	n.540T>C		non_coding_transcript_exon_variant	Exon 2 of 3
LOC105372791	NR_188572.1	n.540T>C		non_coding_transcript_exon_variant	Exon 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KCNE2	ENST00000290310.4	c.269A>G	p.Glu90Gly	missense_variant	Exon 2 of 2	1	NM_172201.2	ENSP00000290310.2
ENSG00000225555	ENST00000440403.2	n.542T>C		non_coding_transcript_exon_variant	Exon 2 of 3	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Atrial fibrillation Other:1

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Cardiovascular Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

This variant has been reported as associated with Atrial fibrillation in the following publications (PMID:18006559). This is a literature report, and does not necessarily reflect the clinical interpretation of the Imperial College / Royal Brompton Cardiovascular Genetics laboratory. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.030	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.64	D
Eigen	Benign	0.094
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.70	T
M_CAP	Benign	0.056	D
MetaRNN	Benign	0.31	T
MetaSVM	Uncertain	0.28	D
MutationAssessor	Benign	1.4	L
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.26
Sift	Benign	0.034	D
Sift4G	Benign	0.11	T
Polyphen		0.32	B
Vest4		0.087
MutPred		0.35		Gain of sheet (P = 0.0266);
MVP		0.89
MPC		0.13
ClinPred		0.82	D
GERP RS		5.7
Varity_R		0.14
gMVP		0.68

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

Other links and lift over

dbSNP: rs199473366; hg19: chr21-35743046;