4-113354376-G-C

Variant names:

• chr4-113354376-G-C
• rs140189724
• NM_001148.6:c.5758G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001148.6(ANK2):​c.5758G>C​(p.Gly1920Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,754 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar. Synonymous variant affecting the same amino acid position (i.e. G1920G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ANK2 NM_001148.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.683
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE, MODERATE Submitted by: Ambry Genetics, ClinGen
• Brugada syndrome

  Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Genomics England PanelApp, ClinGen
• catecholaminergic polymorphic ventricular tachycardia

  Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: ClinGen, Genomics England PanelApp
• heart conduction disease

  Inheritance: AD Classification: LIMITED Submitted by: Genomics England PanelApp
• neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: G2P
• cardiac arrhythmia, ankyrin-B-related

  Inheritance: Unknown, AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• long QT syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

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=0.19069606).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001148.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ANK2	NM_001148.6	MANE Select	c.5758G>C	p.Gly1920Arg	missense	Exon 38 of 46	NP_001139.3
	ANK2	NM_001386174.1		c.5899G>C	p.Gly1967Arg	missense	Exon 40 of 51	NP_001373103.1
	ANK2	NM_001386175.1		c.5875G>C	p.Gly1959Arg	missense	Exon 39 of 50	NP_001373104.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ANK2	ENST00000357077.9	TSL:1 MANE Select	c.5758G>C	p.Gly1920Arg	missense	Exon 38 of 46	ENSP00000349588.4
	ANK2	ENST00000506344.6	TSL:1	c.5899G>C	p.Gly1967Arg	missense	Exon 40 of 51	ENSP00000422888.2
	ANK2	ENST00000394537.7	TSL:1	c.4426+4127G>C		intron	N/A	ENSP00000378044.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461754 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727174

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39662

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111952

Other (OTH) AF: 0.0000166 AC: 1 AN: 60394

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Benign	-0.030	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	20
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	T
Eigen	Benign	-0.16
Eigen_PC	Benign	-0.33
FATHMM_MKL	Benign	0.071	N
LIST_S2	Uncertain	0.89	D
M_CAP	Benign	0.055	D
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	1.3	L
PhyloP100		0.68
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-0.91	N
REVEL	Benign	0.26
Sift	Uncertain	0.0040	D
Sift4G	Benign	0.48	T
Vest4		0.34
MVP		0.68
MPC		0.16
ClinPred		0.21	T
GERP RS		1.3
Varity_R		0.11
gMVP		0.024
Mutation Taster		=87/13	polymorphism

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

Other links and lift over

dbSNP: rs140189724; hg19: chr4-114275532;