chr2-157737758-C-T

Position:

• chr2-157737758-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_001111067.4(ACVR1):​c.1396-93G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00222 in 1,515,496 control chromosomes in the GnomAD database, including 76 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.012 (48 hom., cov: 32)
  • Exomes 𝑓: 0.0011 (28 hom.)
• Consequence: ACVR1 NM_001111067.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.861

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 Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0121 (1843/152220) while in subpopulation AFR AF= 0.0419 (1741/41526). AF 95% confidence interval is 0.0403. There are 48 homozygotes in gnomad4. There are 856 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 1843 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACVR1	NM_001111067.4	c.1396-93G>A		intron_variant		ENST00000434821.7	NP_001104537.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ACVR1	ENST00000434821.7	c.1396-93G>A		intron_variant		1	NM_001111067.4	ENSP00000405004	P4

Frequencies

GnomAD3 genomes AF: 0.0121 AC: 1845 AN: 152102 Hom.: 48 Cov.: 32

Gnomad AFR AF: 0.0421

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00484

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.0101

GnomAD4 exome AF: 0.00111 AC: 1515 AN: 1363276 Hom.: 28 AF XY: 0.000924 AC XY: 632 AN XY: 684046

Gnomad4 AFR exome AF: 0.0397

Gnomad4 AMR exome AF: 0.00175

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000119

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000215

Gnomad4 OTH exome AF: 0.00282

GnomAD4 genome AF: 0.0121 AC: 1843 AN: 152220 Hom.: 48 Cov.: 32 AF XY: 0.0115 AC XY: 856 AN XY: 74430

Gnomad4 AFR AF: 0.0419

Gnomad4 AMR AF: 0.00477

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000103

Gnomad4 OTH AF: 0.00996

Alfa AF: 0.0128 Hom.: 6

Bravo AF: 0.0133

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	4.6
DANN	Benign	0.44

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: rs16842009; hg19: chr2-158594270;