1-39522438-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_181809.4(BMP8A):c.904C>T(p.Arg302Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000806 in 1,613,126 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R302H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000075 ( 0 hom. )

Consequence

BMP8A
NM_181809.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.15

Variant links:

Genes affected

BMP8A (HGNC:21650): (bone morphogenetic protein 8a) This gene encodes a secreted ligand of the TGF-beta (transforming growth factor-beta) superfamily of proteins. Ligands of this family bind various TGF-beta receptors leading to recruitment and activation of SMAD family transcription factors that regulate gene expression. The encoded preproprotein is proteolytically processed to generate each subunit of the disulfide-linked homodimer. This protein may play a role in development of the reproductive system. This gene may have arose from a gene duplication event and its gene duplicate is also present on chromosome 1. [provided by RefSeq, Jul 2016]

BMP8A links:

PPIEL (HGNC:33195): (peptidylprolyl isomerase E like (pseudogene)) This transcribed pseudogene is related to PPIE (Gene ID: 10450). Expression of this pseudogene may be downregulated in non-small cell lung cancer (NSCLC). Differential DNA methylation of this locus may be associated with intellectual disability and bipolar disorder in human patients. [provided by RefSeq, Sep 2016]

PPIEL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.873

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BMP8A	NM_181809.4 linkuse as main transcript	c.904C>T	p.Arg302Cys	missense_variant	5/7	ENST00000331593.6
PPIEL	NR_003929.2 linkuse as main transcript	n.2479G>A		non_coding_transcript_exon_variant	9/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BMP8A	ENST00000331593.6 linkuse as main transcript	c.904C>T	p.Arg302Cys	missense_variant	5/7	1	NM_181809.4	P1
PPIEL	ENST00000692918.1 linkuse as main transcript	n.1125G>A		non_coding_transcript_exon_variant	9/9

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151860

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000753

AC:

AN:

1461266

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

726894

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151860

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74148

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 14, 2023

The c.904C>T (p.R302C) alteration is located in exon 5 (coding exon 5) of the BMP8A gene. This alteration results from a C to T substitution at nucleotide position 904, causing the arginine (R) at amino acid position 302 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.37

BayesDel_addAF

Benign

-0.010

BayesDel_noAF

Uncertain

-0.080

Cadd

Pathogenic

Dann

Pathogenic

1.0

DEOGEN2

Uncertain

0.63

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Uncertain

0.92

LIST_S2

Pathogenic

0.99

M_CAP

Pathogenic

0.38

MetaRNN

Pathogenic

0.87

MetaSVM

Uncertain

0.18

MutationAssessor

Benign

0.99

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.66

PROVEAN

Pathogenic

-6.4

REVEL

Uncertain

0.61

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.61

MutPred

0.72

Loss of MoRF binding (P = 0.0283);

MVP

0.85

MPC

3.2

ClinPred

1.0

GERP RS

3.4

Varity_R

0.64

gMVP

0.69

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over