rs1058945

Positions:

• chr3-38491020-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001106.4(ACVR2B):​c.*7688G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.428 in 152,208 control chromosomes in the GnomAD database, including 16,258 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.43 (16199 hom., cov: 32)
  • Exomes 𝑓: 0.51 (59 hom.)
• Consequence: ACVR2B NM_001106.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.0220

Genes affected

ACVR2B (HGNC:174): (activin A receptor type 2B) 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. Type II receptors are considered to be constitutively active kinases. This gene encodes activin A type IIB receptor, which displays a 3- to 4-fold higher affinity for the ligand than activin A type II receptor. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).
• BP6: Variant 3-38491020-G-A is Benign according to our data. Variant chr3-38491020-G-A is described in ClinVar as [Benign]. Clinvar id is 345025.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.568 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACVR2B	NM_001106.4	c.*7688G>A		3_prime_UTR_variant	11/11	ENST00000352511.5	NP_001097.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ACVR2B	ENST00000352511.5	c.*7688G>A		3_prime_UTR_variant	11/11	1	NM_001106.4	ENSP00000340361	P1

Frequencies

GnomAD3 genomes AF: 0.428 AC: 64856 AN: 151662 Hom.: 16200 Cov.: 32

Gnomad AFR AF: 0.179

Gnomad AMI AF: 0.465

Gnomad AMR AF: 0.388

Gnomad ASJ AF: 0.493

Gnomad EAS AF: 0.270

Gnomad SAS AF: 0.510

Gnomad FIN AF: 0.533

Gnomad MID AF: 0.478

Gnomad NFE AF: 0.573

Gnomad OTH AF: 0.449

GnomAD4 exome AF: 0.509 AC: 218 AN: 428 Hom.: 59 Cov.: 0 AF XY: 0.523 AC XY: 134 AN XY: 256

Gnomad4 FIN exome AF: 0.512

Gnomad4 NFE exome AF: 0.500

Gnomad4 OTH exome AF: 0.250

GnomAD4 genome AF: 0.427 AC: 64858 AN: 151780 Hom.: 16199 Cov.: 32 AF XY: 0.425 AC XY: 31509 AN XY: 74170

Gnomad4 AFR AF: 0.178

Gnomad4 AMR AF: 0.387

Gnomad4 ASJ AF: 0.493

Gnomad4 EAS AF: 0.269

Gnomad4 SAS AF: 0.510

Gnomad4 FIN AF: 0.533

Gnomad4 NFE AF: 0.573

Gnomad4 OTH AF: 0.449

Alfa AF: 0.525 Hom.: 22022

Bravo AF: 0.400

Asia WGS AF: 0.401 AC: 1393 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Heterotaxy, visceral, 4, autosomal Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	3.1
DANN	Benign	0.77

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: rs1058945; hg19: chr3-38532511;