rs758882774

Positions:

• chr10-65966644-G-C
• chr10-65966644-G-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_013266.4(CTNNA3):​c.2368C>G​(p.Gln790Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000013 in 1,613,738 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: CTNNA3 NM_013266.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 10.0

Genes affected

CTNNA3 (HGNC:2511): (catenin alpha 3) This gene encodes a protein that belongs to the vinculin/alpha-catenin family. The encoded protein plays a role in cell-cell adhesion in muscle cells. Mutations in this gene are associated with arrhythmogenic right ventricular dysplasia, familial 13. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2014]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• BS2: High AC in GnomAdExome4 at 18 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CTNNA3	NM_013266.4	c.2368C>G	p.Gln790Glu	missense_variant	17/18	ENST00000433211.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CTNNA3	ENST00000433211.7	c.2368C>G	p.Gln790Glu	missense_variant	17/18	1	NM_013266.4	P1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152150 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000578

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

GnomAD3 exomes AF: 0.0000319 AC: 8 AN: 251130 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135724

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000326

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000123 AC: 18 AN: 1461588 Hom.: 0 Cov.: 30 AF XY: 0.0000138 AC XY: 10 AN XY: 727100

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000994

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152150 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74322

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000578

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000189

ExAC AF: 0.0000247 AC: 3

Asia WGS AF: 0.00202 AC: 7 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 04, 2024

The p.Q790E variant (also known as c.2368C>G), located in coding exon 16 of the CTNNA3 gene, results from a C to G substitution at nucleotide position 2368. The glutamine at codon 790 is replaced by glutamic acid, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

Arrhythmogenic right ventricular dysplasia 13 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Apr 06, 2023

This variant has not been reported in the literature in individuals affected with CTNNA3-related conditions. This variant is present in population databases (rs758882774, gnomAD 0.03%). This sequence change replaces glutamine, which is neutral and polar, with glutamic acid, which is acidic and polar, at codon 790 of the CTNNA3 protein (p.Gln790Glu). ClinVar contains an entry for this variant (Variation ID: 579234). 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CTNNA3 protein function. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.13
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Benign	0.17	T
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.0063	T
MetaRNN	Uncertain	0.60	D
MetaSVM	Benign	-0.93	T
MutationAssessor	Benign	1.5	L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-2.0	N
REVEL	Uncertain	0.35
Sift	Benign	0.17	T
Sift4G	Uncertain	0.0060	D
Polyphen		0.39	B
Vest4		0.80
MutPred		0.50		Gain of ubiquitination at K786 (P = 0.1062);
MVP		0.66
MPC		0.022
ClinPred		0.19	T
GERP RS		5.4
Varity_R		0.28
gMVP		0.38

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: rs758882774; hg19: chr10-67726402;