rs786205220

Positions:

• chr8-22194174-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP5_Moderate

The NM_006129.5(BMP1):​c.1297G>T​(p.Ala433Ser) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BMP1 NM_006129.5 missense, splice_region
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 9.90

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]

BMP1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 8-22194174-G-T is Pathogenic according to our data. Variant chr8-22194174-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 190234.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BMP1	NM_006129.5	c.1297G>T	p.Ala433Ser	missense_variant, splice_region_variant	10/20	ENST00000306385.10	NP_006120.1
BMP1	NM_001199.4	c.1297G>T	p.Ala433Ser	missense_variant, splice_region_variant	10/16	ENST00000306349.13	NP_001190.1
BMP1	NR_033403.2	n.1368G>T		splice_region_variant, non_coding_transcript_exon_variant	10/20
BMP1	NR_033404.2	n.1368G>T		splice_region_variant, non_coding_transcript_exon_variant	10/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BMP1	ENST00000306385.10	c.1297G>T	p.Ala433Ser	missense_variant, splice_region_variant	10/20	1	NM_006129.5	ENSP00000305714.5
BMP1	ENST00000306349.13	c.1297G>T	p.Ala433Ser	missense_variant, splice_region_variant	10/16	1	NM_001199.4	ENSP00000306121.8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Osteogenesis imperfecta type 13 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 01, 2015

- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 29, 2023

This variant is not present in population databases (gnomAD no frequency). For these reasons, this variant has been classified as Pathogenic. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Studies have shown that this missense change results in skipping of exon 10, but is expected to preserve the integrity of the reading-frame (PMID: 25402547). Experimental studies have shown that this missense change affects BMP1 function (PMID: 25402547). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant  is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 190234). This missense change has been observed in individual(s) with osteogenesis imperfecta (PMID: 25402547). This sequence change replaces alanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 433 of the BMP1 protein (p.Ala433Ser). RNA analysis indicates that this missense change induces altered splicing and likely results in a shortened protein product. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.078	D
BayesDel_noAF	Benign	-0.13
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	T;.
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Benign	0.030	D
MetaRNN	Uncertain	0.56	D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L;L
PrimateAI	Pathogenic	0.82	D
PROVEAN	Uncertain	-2.8	D;D
REVEL	Benign	0.23
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.022	D;D
Polyphen		0.19	B;P
Vest4		0.70
MutPred		0.49		Gain of disorder (P = 0.1177);Gain of disorder (P = 0.1177);
MVP		0.53
MPC		0.44
ClinPred		0.95	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.9
Varity_R		0.27
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.95
SpliceAI score (max)		0.91		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.91		Position offset: 0

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs786205220; hg19: chr8-22051687;