1-39760454-G-C

Variant names:

• chr1-39760454-G-C
• rs537094534
• NM_001720.5:c.1174C>G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001720.5(BMP8B):​c.1174C>G​(p.Arg392Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R392C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: BMP8B NM_001720.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.60

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 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, 0.859

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BMP8B	NM_001720.5	c.1174C>G	p.Arg392Gly	missense_variant	Exon 7 of 7	ENST00000372827.8	NP_001711.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BMP8B	ENST00000372827.8	c.1174C>G	p.Arg392Gly	missense_variant	Exon 7 of 7	1	NM_001720.5	ENSP00000361915.3
PPIE	ENST00000372830.5	c.838-2063G>C		intron_variant	Intron 9 of 10	1		ENSP00000361918.1
PPIE	ENST00000356511.6	c.838-3235G>C		intron_variant	Intron 9 of 9	1		ENSP00000348904.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251282 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135848

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000163

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.40
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.17
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.91	D
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.28	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Uncertain	0.70	D
MutationAssessor	Benign	1.9	L
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.71
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0050	D
Polyphen		1.0	D
Vest4		0.54
MutPred		0.57		Loss of MoRF binding (P = 0.0148);
MVP		0.94
ClinPred		0.99	D
GERP RS		4.2
Varity_R		0.78
gMVP		0.72

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: rs537094534; hg19: chr1-40226126;