rs138438183

Positions:

chr4-113357461-C-G

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 1P and 8B. PP2BP4_StrongBS2

The NM_001148.6(ANK2):c.8843C>G(p.Ala2948Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000394 in 1,613,964 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00025 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00041 ( 0 hom. )

Consequence

ANK2
NM_001148.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: -0.404

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ANK2. . Gene score misZ 1.9641 (greater than the threshold 3.09). Trascript score misZ 4.2513 (greater than threshold 3.09). GenCC has associacion of gene with heart conduction disease, Brugada syndrome, long QT syndrome, complex neurodevelopmental disorder, cardiac arrhythmia, ankyrin-B-related, catecholaminergic polymorphic ventricular tachycardia.

BP4

Computational evidence support a benign effect (MetaRNN=0.03793904).

BS2

High AC in GnomAd4 at 38 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ANK2	NM_001148.6 linkuse as main transcript	c.8843C>G	p.Ala2948Gly	missense_variant	38/46	ENST00000357077.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ANK2	ENST00000357077.9 linkuse as main transcript	c.8843C>G	p.Ala2948Gly	missense_variant	38/46	1	NM_001148.6	A2	Q01484-4

Frequencies

GnomAD3 genomes

AF:

0.000250

AC:

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

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:

0.000412

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000219

AC:

AN:

250808

Hom.:

AF XY:

0.000199

AC XY:

AN XY:

135560

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000424

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000409

AC:

598

AN:

1461820

Hom.:

Cov.:

AF XY:

0.000370

AC XY:

269

AN XY:

727214

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000515

Gnomad4 OTH exome

AF:

0.000248

GnomAD4 genome

AF:

0.000250

AC:

AN:

152144

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000412

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000426

Hom.:

Bravo

AF:

0.000366

TwinsUK

AF:

0.00162

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000189

AC:

EpiCase

AF:

0.000382

EpiControl

AF:

0.000474

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Cardiac arrhythmia, ankyrin-B-related

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 12, 2024

Reported as a variant of uncertain significance in two sisters and in an unrelated patient with Brugada syndrome (PMID: 26230511, 30821013); In silico analysis indicates that this missense variant does not alter protein structure/function; Located in exon 38, which is reported as being expressed in a brain-specific transcript (PMID: 1830053, 18790697, 26109584); This variant is associated with the following publications: (PMID: 30821013, 26230511, 1830053, 18790697, 26109584) -

Long QT syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 04, 2024

This sequence change replaces alanine, which is neutral and non-polar, with glycine, which is neutral and non-polar, at codon 2948 of the ANK2 protein (p.Ala2948Gly). This variant is present in population databases (rs138438183, gnomAD 0.04%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with Brugada syndrome (PMID: 26230511). ClinVar contains an entry for this variant (Variation ID: 379553). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 19, 2018

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.54

BayesDel_noAF

Benign

-0.58

CADD

Benign

9.0

DANN

Benign

0.90

DEOGEN2

Benign

0.30

T;T

Eigen

Benign

-0.88

Eigen_PC

Benign

-0.92

FATHMM_MKL

Benign

0.053

LIST_S2

Benign

0.80

T;T

M_CAP

Benign

0.028

MetaRNN

Benign

0.038

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.55

N;.

MutationTaster

Benign

1.0

N;N;N;N;N;N

PrimateAI

Benign

0.17

PROVEAN

Benign

-0.33

N;N

REVEL

Benign

0.084

Sift

Uncertain

0.0050

D;D

Sift4G

Benign

0.46

T;T

Vest4

0.047

MVP

0.38

MPC

0.10

ClinPred

0.013

GERP RS

-1.2

Varity_R

0.069

gMVP

0.018

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over