rs199473649

chr21-34370644-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_172201.2(KCNE2):c.166A>G(p.Met56Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as not provided (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: KCNE2 NM_172201.2 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 5.06

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]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KCNE2	NM_172201.2	c.166A>G	p.Met56Val	missense_variant	2/2	ENST00000290310.4
LOC105372791	XR_937683.3	n.1210T>C		non_coding_transcript_exon_variant	2/2
LOC105372791	XR_007067848.1	n.1245T>C		non_coding_transcript_exon_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KCNE2	ENST00000290310.4	c.166A>G	p.Met56Val	missense_variant	2/2	1	NM_172201.2	P1
	ENST00000440403.2	n.645T>C		non_coding_transcript_exon_variant	2/3	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

not provided Other:1

not provided, no classification provided

literature only

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

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.56	D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.72	T
M_CAP	Benign	0.075	D
MetaRNN	Uncertain	0.49	T
MetaSVM	Uncertain	0.56	D
MutationAssessor	Benign	1.9	L
MutationTaster	Benign	0.84	D
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-1.1	N
REVEL	Uncertain	0.54
Sift	Benign	0.26	T
Sift4G	Benign	0.14	T
Polyphen		0.99	D
Vest4		0.37
MutPred		0.42		Gain of catalytic residue at M56 (P = 0.1068);
MVP		0.89
MPC		0.11
ClinPred		0.92	D
GERP RS		5.7
Varity_R		0.40
gMVP		0.81

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: rs199473649; hg19: chr21-35742943;