rs121434527

Variant names:

• chr10-88939542-C-T
• rs121434527
• NM_001613.4:c.773G>A

Your query was ambiguous. Multiple possible variants found:

• chr10-88939542-C-T
• chr10-88939542-C-G

Variant summary

Our verdict is Pathogenic. The variant received 23 ACMG points: 23P and 0B. PS3 PM1 PM2 PM5 PP2 PP3_Strong PP5_Very_Strong

The NM_001613.4(ACTA2):​c.773G>A​(p.Arg258His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV000541638: Experimental studies have shown that this missense change affects ACTA2 function (PMID:22753406)." and additional evidence is available in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R258C) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACTA2 NM_001613.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:7
• Conservation: PhyloP100: 7.91
• Publications: 21 publications found

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]

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]

ACTA2-AS1 (HGNC:45169): (ACTA2 antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 23 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV000541638: Experimental studies have shown that this missense change affects ACTA2 function (PMID: 22753406).; SCV000233302: "in vitro functional studies showed that R258H alters actin filament conformation and stability (Guo et al., 2007; Malloy L et al., 2012)."
• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 11 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 chr10-88939543-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 18278.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant in the ACTA2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 27 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Trascript score misZ: 4.6117 (above the threshold of 3.09). GenCC associations: The gene is linked to Moyamoya disease 5, connective tissue disorder, multisystemic smooth muscle dysfunction syndrome, familial thoracic aortic aneurysm and aortic dissection, aortic aneurysm, familial thoracic 6.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant 10-88939542-C-T is Pathogenic according to our data. Variant chr10-88939542-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 18277.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001613.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ACTA2	NM_001613.4	MANE Select	c.773G>A	p.Arg258His	missense	Exon 7 of 9	NP_001604.1	P62736
	ACTA2	NM_001141945.3		c.773G>A	p.Arg258His	missense	Exon 7 of 9	NP_001135417.1	D2JYH4
	ACTA2	NM_001320855.2		c.773G>A	p.Arg258His	missense	Exon 7 of 9	NP_001307784.1	P62736

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ACTA2	ENST00000224784.10	TSL:1 MANE Select	c.773G>A	p.Arg258His	missense	Exon 7 of 9	ENSP00000224784.6	P62736
	ACTA2	ENST00000713598.1		c.815G>A	p.Arg272His	missense	Exon 7 of 9	ENSP00000518894.1	A0AAQ5BGG5
	ACTA2	ENST00000415557.2	TSL:3	c.773G>A	p.Arg258His	missense	Exon 7 of 9	ENSP00000396730.2	P62736

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	Aortic aneurysm, familial thoracic 6 (2)
2	-	-	not provided (2)
1	-	-	Cardiovascular phenotype (1)
1	-	-	Familial thoracic aortic aneurysm and aortic dissection (1)
1	-	-	Moyamoya disease 5 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	32
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.82	D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.58	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.1	H
PhyloP100		7.9
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-4.0	D
REVEL	Pathogenic	0.95
Sift4G	Uncertain	0.0080	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.94		Loss of catalytic residue at R258 (P = 0.0436)
MVP		0.99
ClinPred		1.0	D
GERP RS		6.1
Varity_R		0.79
gMVP		0.88
Mutation Taster		=3/97	disease causing (ClinVar)

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: rs121434527; hg19: chr10-90699299;