Genetic Variant BMP8B:p.Glu278Lys (chr1-39764659-C-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001720.5(BMP8B):c.832G>A(p.Glu278Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000245 in 1,613,388 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0011 ( 1 hom., cov: 30)

Exomes 𝑓: 0.00016 ( 1 hom. )

Consequence

BMP8B
NM_001720.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.778

Variant links:

Genes affected

BMP8B (HGNC:1075): (bone morphogenetic protein 8b) 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. The encoded protein stimulates thermogenesis in brown adipose tissue. Expression of this gene may be downregulated in pancreatic cancer. 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]

BMP8B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011210501).

BS2

High AC in GnomAd4 at 162 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BMP8B	NM_001720.5 link	c.832G>A	p.Glu278Lys	missense_variant	Exon 4 of 7	ENST00000372827.8	NP_001711.2	P34820-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BMP8B	ENST00000372827.8 link	c.832G>A	p.Glu278Lys	missense_variant	Exon 4 of 7	1	NM_001720.5	ENSP00000361915.3		P34820-1

Frequencies

GnomAD3 genomes

AF:

0.00107

AC:

162

AN:

151868

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00372

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.0000588

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000291

AC:

AN:

250824

Hom.:

AF XY:

0.000192

AC XY:

AN XY:

135628

show subpopulations

Gnomad AFR exome

AF:

0.00421

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000159

AC:

233

AN:

1461402

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

727028

show subpopulations

Gnomad4 AFR exome

AF:

0.00392

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.0000766

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000621

Gnomad4 OTH exome

AF:

0.000381

GnomAD4 genome

AF:

0.00107

AC:

162

AN:

151986

Hom.:

Cov.:

AF XY:

0.000861

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.00371

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000672

Hom.:

ESP6500AA

AF:

0.00318

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000404

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Mar 06, 2024

Clinical Genomics Laboratory, Washington University in St. Louis

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The BMP8B c.832G>A (p.Glu278Lys) variant, to our knowledge, has not been reported in the medical literature. The highest population minor allele frequency in the population database genome aggregation database (v.2.1.1) is 0.42% in the African population. Computational predictors suggest that the variant does not impact BMP8B function. Due to limited information, the clinical significance of this variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.43

CADD

Benign

DANN

Benign

0.79

DEOGEN2

Benign

0.35

Eigen

Benign

-0.54

Eigen_PC

Benign

-0.58

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.78

M_CAP

Benign

0.025

MetaRNN

Benign

0.011

MetaSVM

Benign

-0.73

MutationAssessor

Uncertain

2.1

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-1.2

REVEL

Benign

0.13

Sift

Benign

0.64

Sift4G

Benign

0.66

Polyphen

0.73

Vest4

0.24

MVP

0.63

ClinPred

0.028

GERP RS

0.80

Varity_R

0.036

gMVP

0.45

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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