4-113049732-A-G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001148.6(ANK2):c.4A>G(p.Met2Val) variant causes a missense change. The variant allele was found at a frequency of 0.0000025 in 1,597,196 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M2I) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

ANK2
NM_001148.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.70

Publications

0 publications found

Variant links:

Genes affected

ANK2 (HGNC:493): (ankyrin 2) This gene encodes a member of the ankyrin family of proteins that link the integral membrane proteins to the underlying spectrin-actin cytoskeleton. Ankyrins play key roles in activities such as cell motility, activation, proliferation, contact and the maintenance of specialized membrane domains. Most ankyrins are typically composed of three structural domains: an amino-terminal domain containing multiple ankyrin repeats; a central region with a highly conserved spectrin binding domain; and a carboxy-terminal regulatory domain which is the least conserved and subject to variation. The protein encoded by this gene is required for targeting and stability of Na/Ca exchanger 1 in cardiomyocytes. Mutations in this gene cause long QT syndrome 4 and cardiac arrhythmia syndrome. Multiple transcript variants encoding different isoforms have been described. [provided by RefSeq, Dec 2011]

ANK2 links:

ANK2-AS1 (HGNC:40076): (ANK2 antisense RNA 1)

ANK2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.24668196).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ANK2	NM_001148.6 link	c.4A>G	p.Met2Val	missense_variant	Exon 1 of 46	ENST00000357077.9	NP_001139.3	Q01484-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ANK2	ENST00000357077.9 link	c.4A>G	p.Met2Val	missense_variant	Exon 1 of 46	1	NM_001148.6	ENSP00000349588.4		Q01484-4

Frequencies

GnomAD3 genomes

AF:

0.0000198

AC:

AN:

151504

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000727

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

6.92e-7

AC:

AN:

1445692

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

719374

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

32782

American (AMR)

AF:

0.00

AC:

AN:

44236

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25382

East Asian (EAS)

AF:

0.00

AC:

AN:

38288

South Asian (SAS)

AF:

0.00

AC:

AN:

86064

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52144

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5664

European-Non Finnish (NFE)

AF:

9.08e-7

AC:

AN:

1101906

Other (OTH)

AF:

0.00

AC:

AN:

59226

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000198

AC:

AN:

151504

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

73996

show subpopulations

African (AFR)

AF:

0.0000727

AC:

AN:

41270

American (AMR)

AF:

0.00

AC:

AN:

15198

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5086

South Asian (SAS)

AF:

0.00

AC:

AN:

4670

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10574

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67920

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.592

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Cardiovascular phenotype

Uncertain:1

Dec 31, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.M2V variant (also known as c.4A>G), located in coding exon 1 of the ANK2 gene, results from an A to G substitution at nucleotide position 4. The methionine at codon 2 is replaced by valine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Uncertain

0.013

BayesDel_noAF

Benign

-0.22

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.25

T;.;T;T

Eigen

Benign

-0.12

Eigen_PC

Benign

0.12

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.78

T;T;T;T

M_CAP

Benign

0.017

MetaRNN

Benign

0.25

T;T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Benign

0.0

.;N;N;.

PhyloP100

6.7

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-1.2

N;N;N;N

REVEL

Benign

0.20

Sift

Uncertain

0.0080

D;D;D;D

Sift4G

Uncertain

0.032

D;D;T;T

Polyphen

0.0010, 0.0030

.;B;B;.

Vest4

0.65, 0.55, 0.48

MutPred

0.41

Loss of stability (P = 0.4944);Loss of stability (P = 0.4944);Loss of stability (P = 0.4944);Loss of stability (P = 0.4944);

MVP

0.82

MPC

0.62

ClinPred

0.65

GERP RS

5.3

PromoterAI

0.16

Neutral

(source)

Varity_R

0.69

gMVP

0.66

Mutation Taster

=85/15

polymorphism

(source)

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

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4-113049732-A-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over