1-39763173-C-T

Position:

• chr1-39763173-C-T

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS2

The NM_001720.5(BMP8B):​c.978G>A​(p.Ser326=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00107 in 1,613,696 control chromosomes in the GnomAD database, including 26 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S326S) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0021 (3 hom., cov: 32)
  • Exomes 𝑓: 0.00096 (23 hom.)
• Consequence: BMP8B NM_001720.5 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -6.21

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]

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]

ACMG classification

Verdict is Benign. Variant got -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.59).
• BP6: Variant 1-39763173-C-T is Benign according to our data. Variant chr1-39763173-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 721373.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-6.21 with no splicing effect.
• BS2: High AC in GnomAd4 at 319 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BMP8B	NM_001720.5	c.978G>A	p.Ser326=	synonymous_variant	6/7	ENST00000372827.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BMP8B	ENST00000372827.8	c.978G>A	p.Ser326=	synonymous_variant	6/7	1	NM_001720.5	P1
PPIE	ENST00000356511.6	c.838-516C>T		intron_variant		1
PPIE	ENST00000372830.5	c.*28-516C>T		intron_variant		1
PPIE	ENST00000467741.2	n.401-516C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 0.00208 AC: 317 AN: 152080 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.00476

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.0268

Gnomad EAS AF: 0.000387

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000235

Gnomad OTH AF: 0.00287

GnomAD3 exomes AF: 0.00191 AC: 479 AN: 251002 Hom.: 8 AF XY: 0.00175 AC XY: 237 AN XY: 135630

Gnomad AFR exome AF: 0.00511

Gnomad AMR exome AF: 0.000174

Gnomad ASJ exome AF: 0.0318

Gnomad EAS exome AF: 0.000924

Gnomad SAS exome AF: 0.0000653

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000309

Gnomad OTH exome AF: 0.00278

GnomAD4 exome AF: 0.000964 AC: 1409 AN: 1461498 Hom.: 23 Cov.: 31 AF XY: 0.000909 AC XY: 661 AN XY: 727072

Gnomad4 AFR exome AF: 0.00607

Gnomad4 AMR exome AF: 0.000201

Gnomad4 ASJ exome AF: 0.0303

Gnomad4 EAS exome AF: 0.000932

Gnomad4 SAS exome AF: 0.000151

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.000147

Gnomad4 OTH exome AF: 0.00318

GnomAD4 genome AF: 0.00210 AC: 319 AN: 152198 Hom.: 3 Cov.: 32 AF XY: 0.00202 AC XY: 150 AN XY: 74404

Gnomad4 AFR AF: 0.00479

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.0268

Gnomad4 EAS AF: 0.000387

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000235

Gnomad4 OTH AF: 0.00284

Alfa AF: 0.00377 Hom.: 0

Bravo AF: 0.00241

EpiCase AF: 0.000545

EpiControl AF: 0.000533

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 11, 2018	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2024	BMP8B: BP4, BP7 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.59
CADD	Benign	1.3
DANN	Benign	0.83

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: rs138246844; hg19: chr1-40228845; COSMIC: COSV62927563;