8-22173661-C-T

Position:

• chr8-22173661-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_006129.5(BMP1):​c.208C>T​(p.Gln70Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: BMP1 NM_006129.5 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 1.09

Genes affected

BMP1 (HGNC:1067): (bone morphogenetic protein 1) This gene encodes a protein that is capable of inducing formation of cartilage in vivo. Although other bone morphogenetic proteins are members of the TGF-beta superfamily, this gene encodes a protein that is not closely related to other known growth factors. This gene is expressed as alternatively spliced variants that share an N-terminal protease domain but differ in their C-terminal region. [provided by RefSeq, Aug 2008]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 8-22173661-C-T is Pathogenic according to our data. Variant chr8-22173661-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 445864.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BMP1	NM_006129.5	c.208C>T	p.Gln70Ter	stop_gained	2/20	ENST00000306385.10	NP_006120.1
BMP1	NM_001199.4	c.208C>T	p.Gln70Ter	stop_gained	2/16	ENST00000306349.13	NP_001190.1
BMP1	NR_033403.2	n.242C>T		non_coding_transcript_exon_variant	2/20
BMP1	NR_033404.2	n.242C>T		non_coding_transcript_exon_variant	2/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BMP1	ENST00000306385.10	c.208C>T	p.Gln70Ter	stop_gained	2/20	1	NM_006129.5	ENSP00000305714	P1
BMP1	ENST00000306349.13	c.208C>T	p.Gln70Ter	stop_gained	2/16	1	NM_001199.4	ENSP00000306121

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

Bravo AF: 0.0000113

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jun 26, 2017	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 09, 2023	This sequence change creates a premature translational stop signal (p.Gln70*) in the BMP1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BMP1 are known to be pathogenic (PMID: 25656619, 27576954, 28257626). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BMP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 445864). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	36
DANN	Uncertain	1.0
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Pathogenic	0.98	D
MutationTaster	Benign	1.0	A;A;A;A;A
Vest4		0.71
GERP RS		3.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.19		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: rs1422817588; hg19: chr8-22031174;