rs387906590

chr2-157761020-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_001111067.4(ACVR1):c.1124G>C(p.Arg375Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R375H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACVR1 NM_001111067.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.89

Genes affected

ACVR1 (HGNC:171): (activin A receptor type 1) Activins are dimeric growth and differentiation factors which belong to the transforming growth factor-beta (TGF-beta) superfamily of structurally related signaling proteins. Activins signal through a heteromeric complex of receptor serine kinases which include at least two type I ( I and IB) and two type II (II and IIB) receptors. These receptors are all transmembrane proteins, composed of a ligand-binding extracellular domain with cysteine-rich region, a transmembrane domain, and a cytoplasmic domain with predicted serine/threonine specificity. Type I receptors are essential for signaling; and type II receptors are required for binding ligands and for expression of type I receptors. Type I and II receptors form a stable complex after ligand binding, resulting in phosphorylation of type I receptors by type II receptors. This gene encodes activin A type I receptor which signals a particular transcriptional response in concert with activin type II receptors. Mutations in this gene are associated with fibrodysplasia ossificans progressive. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.944
• PP5: Variant 2-157761020-C-G is Pathogenic according to our data. Variant chr2-157761020-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 29596.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr2-157761020-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACVR1	NM_001111067.4	c.1124G>C	p.Arg375Pro	missense_variant	9/11	ENST00000434821.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACVR1	ENST00000434821.7	c.1124G>C	p.Arg375Pro	missense_variant	9/11	1	NM_001111067.4	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Progressive myositis ossificans Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 01, 2009

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
Cadd	Pathogenic	33
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.54	D;D;D;D
Eigen	Uncertain	0.38
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.90	D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.94	D;D;D;D
MetaSVM	Benign	-0.69	T
MutationAssessor	Benign	1.1	L;L;L;L
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-5.7	D;D;D;D
REVEL	Uncertain	0.48
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D
Polyphen		0.91	P;P;P;P
Vest4		0.73
MutPred		0.91		Gain of catalytic residue at P374 (P = 0.0486);Gain of catalytic residue at P374 (P = 0.0486);Gain of catalytic residue at P374 (P = 0.0486);Gain of catalytic residue at P374 (P = 0.0486);
MVP		0.95
MPC		1.8
ClinPred		0.99	D
GERP RS		5.7
Varity_R		0.98
gMVP		0.85

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: rs387906590; hg19: chr2-158617532;