chr2-157770386-T-G

Variant names:

• chr2-157770386-T-G
• rs863224846
• NM_001111067.4:c.772A>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001111067.4(ACVR1):​c.772A>C​(p.Arg258Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. R258R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACVR1 NM_001111067.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.10
• Publications: 35 publications found

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]

ACVR1 Gene-Disease associations (from GenCC):

• fibrodysplasia ossificans progressiva

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, ClinGen, Orphanet
• congenital heart disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).
• BP7: Synonymous conserved (PhyloP=1.1 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001111067.4. 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
	ACVR1	NM_001111067.4	MANE Select	c.772A>C	p.Arg258Arg	synonymous	Exon 7 of 11	NP_001104537.1
	ACVR1	NM_001105.5		c.772A>C	p.Arg258Arg	synonymous	Exon 7 of 11	NP_001096.1
	ACVR1	NM_001347663.1		c.772A>C	p.Arg258Arg	synonymous	Exon 7 of 11	NP_001334592.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ACVR1	ENST00000434821.7	TSL:1 MANE Select	c.772A>C	p.Arg258Arg	synonymous	Exon 7 of 11	ENSP00000405004.1
	ACVR1	ENST00000263640.7	TSL:1	c.772A>C	p.Arg258Arg	synonymous	Exon 7 of 11	ENSP00000263640.3
	ACVR1	ENST00000410057.6	TSL:1	c.772A>C	p.Arg258Arg	synonymous	Exon 8 of 12	ENSP00000387127.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251298 AF XY: 0.00

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.47
CADD	Benign	12
DANN	Benign	0.67
PhyloP100		1.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	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: rs863224846; hg19: chr2-158626898;