Genetic Variant ACVR1B:p.Thr188Ile (chr12-51976558-C-T) – ACMG Classification: Uncertain_significance (5 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2PP2PP3_Moderate

The NM_004302.5(ACVR1B):c.563C>T(p.Thr188Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,114 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ACVR1B
NM_004302.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.83

Publications

0 publications found

Variant links:

Genes affected

ACVR1B (HGNC:172): (activin A receptor type 1B) This gene encodes an activin A type IB receptor. 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 and two type II receptors. This protein is a type I receptor which is essential for signaling. Mutations in this gene are associated with pituitary tumors. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Jun 2010]

ACVR1B Gene-Disease associations (from GenCC):

malignant pancreatic neoplasm
Inheritance: Unknown Classification: NO_KNOWN Submitted by: Ambry Genetics

ACVR1B links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 1 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 3.3735 (above the threshold of 3.09). Trascript score misZ: 4.5396 (above the threshold of 3.09). GenCC associations: The gene is linked to malignant pancreatic neoplasm.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.853

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004302.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ACVR1B	NM_004302.5	MANE Select	c.563C>T	p.Thr188Ile	missense	Exon 3 of 9	NP_004293.1	P36896-1
ACVR1B	NM_020328.4		c.563C>T	p.Thr188Ile	missense	Exon 3 of 10	NP_064733.3
ACVR1B	NM_001412774.1		c.563C>T	p.Thr188Ile	missense	Exon 3 of 10	NP_001399703.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ACVR1B	ENST00000257963.9	TSL:1 MANE Select	c.563C>T	p.Thr188Ile	missense	Exon 3 of 9	ENSP00000257963.4	P36896-1
ACVR1B	ENST00000541224.5	TSL:2	c.563C>T	p.Thr188Ile	missense	Exon 3 of 10	ENSP00000442656.1	P36896-4
ACVR1B	ENST00000900350.1		c.563C>T	p.Thr188Ile	missense	Exon 3 of 10	ENSP00000570409.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461114

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726878

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86222

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53394

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5172

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111988

Other (OTH)

AF:

0.00

AC:

AN:

60318

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.88

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.37

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.95

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

M_CAP

Pathogenic

0.38

MetaRNN

Pathogenic

0.85

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.1

PhyloP100

7.8

PrimateAI

Pathogenic

0.85

PROVEAN

Pathogenic

-5.0

REVEL

Pathogenic

0.88

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.72

MutPred

0.49

Gain of catalytic residue at S191 (P = 0)

MVP

0.93

MPC

2.2

ClinPred

1.0

GERP RS

5.3

Varity_R

0.69

gMVP

0.69

Mutation Taster

=6/94

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over