1-39760430-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP3BP4BS2

The NM_001720.5(BMP8B):c.1198G>A(p.Gly400Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000805 in 1,613,982 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00041 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00085 ( 0 hom. )

Consequence

BMP8B
NM_001720.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.65

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:

PPIE (HGNC:9258): (peptidylprolyl isomerase E) The protein encoded by this gene is a member of the peptidyl-prolyl cis-trans isomerase (PPIase) family. PPIases catalyze the cis-trans isomerization of proline imidic peptide bonds in oligopeptides and accelerate the folding of proteins. This protein contains a highly conserved cyclophilin (CYP) domain as well as an RNA-binding domain. It was shown to possess PPIase and protein folding activities, and it also exhibits RNA-binding activity. Alternative splicing results in multiple transcript variants. A related pseudogene, which is also located on chromosome 1, has been identified. [provided by RefSeq, Aug 2010]

PPIE links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 7: AlphaMissense, Cadd, Eigen, MutationAssessor, phyloP100way_vertebrate, PROVEAN, REVEL [when BayesDel_addAF, max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.3764119).

BS2

High AC in GnomAd4 at 62 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BMP8B	NM_001720.5 link	c.1198G>A	p.Gly400Ser	missense_variant	Exon 7 of 7	ENST00000372827.8	NP_001711.2	P34820-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
BMP8B	ENST00000372827.8 link	c.1198G>A	p.Gly400Ser	missense_variant	Exon 7 of 7	1	NM_001720.5	ENSP00000361915.3	P34820-1
PPIE	ENST00000372830.5 link	c.838-2087C>T		intron_variant	Intron 9 of 10	1		ENSP00000361918.1	Q9UNP9-3
PPIE	ENST00000356511.6 link	c.838-3259C>T		intron_variant	Intron 9 of 9	1		ENSP00000348904.2	Q9UNP9-2

Frequencies

GnomAD3 genomes

AF:

0.000407

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00145

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000647

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000526

AC:

132

AN:

250942

Hom.:

AF XY:

0.000612

AC XY:

AN XY:

135696

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000980

Gnomad FIN exome

AF:

0.0000466

Gnomad NFE exome

AF:

0.000793

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.000846

AC:

1237

AN:

1461632

Hom.:

Cov.:

AF XY:

0.000839

AC XY:

610

AN XY:

727140

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000881

Gnomad4 FIN exome

AF:

0.0000752

Gnomad4 NFE exome

AF:

0.00100

Gnomad4 OTH exome

AF:

0.000580

GnomAD4 genome

AF:

0.000407

AC:

AN:

152350

Hom.:

Cov.:

AF XY:

0.000416

AC XY:

AN XY:

74510

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00145

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000647

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000649

Hom.:

Bravo

AF:

0.000431

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000814

AC:

ExAC

AF:

0.000552

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000436

EpiControl

AF:

0.00101

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 12, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1198G>A (p.G400S) alteration is located in exon 7 (coding exon 7) of the BMP8B gene. This alteration results from a G to A substitution at nucleotide position 1198, causing the glycine (G) at amino acid position 400 to be replaced by a serine (S). 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

Pathogenic

0.80

BayesDel_addAF

Benign

-0.034

BayesDel_noAF

Uncertain

0.11

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.94

Eigen

Pathogenic

0.84

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.91

LIST_S2

Pathogenic

0.99

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.38

MetaSVM

Pathogenic

0.85

MutationAssessor

Pathogenic

3.1

PrimateAI

Uncertain

0.56

PROVEAN

Pathogenic

-5.2

REVEL

Pathogenic

0.83

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.56

MVP

0.78

ClinPred

0.19

GERP RS

4.2

Varity_R

0.85

gMVP

0.75

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