rs772862676

Positions:

chr10-88941253-G-A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1PM2PM5PP2PP3_StrongPP5

The NM_001613.4(ACTA2):c.592C>T(p.Arg198Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,784 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R198H) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ACTA2
NM_001613.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:2

Conservation

PhyloP100: 7.97

Variant links:

Genes affected

ACTA2 (HGNC:130): (actin alpha 2, smooth muscle) This gene encodes one of six different actin proteins. Actins are highly conserved proteins that are involved in cell motility, structure, integrity, and intercellular signaling. The encoded protein is a smooth muscle actin that is involved in vascular contractility and blood pressure homeostasis. Mutations in this gene cause a variety of vascular diseases, such as thoracic aortic disease, coronary artery disease, stroke, and Moyamoya disease, as well as multisystemic smooth muscle dysfunction syndrome. [provided by RefSeq, Sep 2017]

ACTA2 links:

STAMBPL1 (HGNC:24105): (STAM binding protein like 1) Predicted to enable Lys63-specific deubiquitinase activity and thiol-dependent deubiquitinase. Predicted to be involved in protein K63-linked deubiquitination. Located in membrane. [provided by Alliance of Genome Resources, Apr 2022]

STAMBPL1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_001613.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr10-88941252-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 264311.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP2

Missense variant where missense usually causes diseases, ACTA2

PP3

MetaRNN computational evidence supports a deleterious effect, 0.982

PP5

Variant 10-88941253-G-A is Pathogenic according to our data. Variant chr10-88941253-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 263819.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Uncertain_significance=2, Pathogenic=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACTA2	NM_001613.4 linkuse as main transcript	c.592C>T	p.Arg198Cys	missense_variant	6/9	ENST00000224784.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACTA2	ENST00000224784.10 linkuse as main transcript	c.592C>T	p.Arg198Cys	missense_variant	6/9	1	NM_001613.4	P1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

250946

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135614

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461660

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727138

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152124

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74318

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection

Pathogenic:1Uncertain:1

Likely pathogenic, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 25, 2020	The p.R198C variant (also known as c.592C>T), located in coding exon 5 of the ACTA2 gene, results from a C to T substitution at nucleotide position 592. The arginine at codon 198 is replaced by cysteine, an amino acid with highly dissimilar properties. This alteration has been reported in multiple subjects with aortic dissections or aneurysms (Regalado ES et al. Circ Cardiovasc Genet, 2015 Jun;8:457-64; Ambry internal data; GeneDx pers. comm.; Invitae pers. comm.). A likely pathogenic alteration affecting the same amino acid, p.R198H (c.593G>A), has also been reported in association with aortic disease (Regalado ES et al, Circ Cardiovasc Genet 2015 Jun; 8(3):457-64). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic. -
Uncertain significance, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Aug 21, 2020	- -

Aortic aneurysm, familial thoracic 6

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Jan 05, 2024

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 198 of the ACTA2 protein (p.Arg198Cys). This variant is present in population databases (rs772862676, gnomAD 0.0009%). This missense change has been observed in individuals with thoracic aortic aneurysm and/or dissection (PMID: 25759435; Invitae). ClinVar contains an entry for this variant (Variation ID: 263819). 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 ACTA2 protein function with a negative predictive value of 80%. This variant disrupts the p.Arg198 amino acid residue in ACTA2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 25759435; Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Oct 19, 2020

Reported in ClinVar as a variant of uncertain significance or likely pathological (ClinVar Variant ID# 263819; Landrum et al., 2016); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 25759435) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.48

BayesDel_noAF

Pathogenic

0.44

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.83

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.96

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.30

MetaRNN

Pathogenic

0.98

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.7

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Pathogenic

0.92

PROVEAN

Pathogenic

-5.7

REVEL

Pathogenic

0.92

Sift4G

Uncertain

0.041

Polyphen

0.99

Vest4

0.86

MutPred

0.94

Loss of ubiquitination at K193 (P = 0.0618);

MVP

0.95

ClinPred

0.99

GERP RS

5.9

Varity_R

0.81

gMVP

0.97

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