10-86756637-CGGCGGCCGCTGCAGAGATTGGAATCCGCCTGCCGGGCTTGGCGAAGGAGAAGGGAGGAGGCAGGAGCGAGGAGGGAGGAGGGCCAAGGGCGGGCAGGAAGGCTTAGGCTCGGCGCGTCCGTCCGCGCGCGGCGAAGATCGCACGGCCCGATCGAGGGGCGACCGGGTCGGGGCCGCTGCACGCCAAGGGCGAAGGCCGATTCGGGCCCCACTTCGCCCCGGCGGCTCGCCGCGCCCACCCGCTCCGCGCCGAGGGCTGGAGGATGCGTTCCCTGGGGTCCG-C

Variant summary

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

The NM_004329.3(BMPR1A):c.-547_-268+1del variant causes a splice region, 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BMPR1A NM_004329.3 splice_region, 5_prime_UTR
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.48

Genes affected

BMPR1A (HGNC:1076): (bone morphogenetic protein receptor type 1A) The bone morphogenetic protein (BMP) receptors are a family of transmembrane serine/threonine kinases that include the type I receptors BMPR1A and BMPR1B and the type II receptor BMPR2. These receptors are also closely related to the activin receptors, ACVR1 and ACVR2. The ligands of these receptors are members of the TGF-beta superfamily. TGF-betas and activins transduce their signals through the formation of heteromeric complexes with 2 different types of serine (threonine) kinase receptors: type I receptors of about 50-55 kD and type II receptors of about 70-80 kD. Type II receptors bind ligands in the absence of type I receptors, but they require their respective type I receptors for signaling, whereas type I receptors require their respective type II receptors for ligand binding. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 10-86756637-CGGCGGCCGCTGCAGAGATTGGAATCCGCCTGCCGGGCTTGGCGAAGGAGAAGGGAGGAGGCAGGAGCGAGGAGGGAGGAGGGCCAAGGGCGGGCAGGAAGGCTTAGGCTCGGCGCGTCCGTCCGCGCGCGGCGAAGATCGCACGGCCCGATCGAGGGGCGACCGGGTCGGGGCCGCTGCACGCCAAGGGCGAAGGCCGATTCGGGCCCCACTTCGCCCCGGCGGCTCGCCGCGCCCACCCGCTCCGCGCCGAGGGCTGGAGGATGCGTTCCCTGGGGTCCG-C is Pathogenic according to our data. Variant chr10-86756637-CGGCGGCCGCTGCAGAGATTGGAATCCGCCTGCCGGGCTTGGCGAAGGAGAAGGGAGGAGGCAGGAGCGAGGAGGGAGGAGGGCCAAGGGCGGGCAGGAAGGCTTAGGCTCGGCGCGTCCGTCCGCGCGCGGCGAAGATCGCACGGCCCGATCGAGGGGCGACCGGGTCGGGGCCGCTGCACGCCAAGGGCGAAGGCCGATTCGGGCCCCACTTCGCCCCGGCGGCTCGCCGCGCCCACCCGCTCCGCGCCGAGGGCTGGAGGATGCGTTCCCTGGGGTCCG-C is described in ClinVar as [Pathogenic]. Clinvar id is 571700.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BMPR1A	NM_004329.3	c.-547_-268+1del		splice_region_variant, 5_prime_UTR_variant	1/13	ENST00000372037.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BMPR1A	ENST00000372037.8	c.-547_-268+1del		splice_region_variant, 5_prime_UTR_variant	1/13	1	NM_004329.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Generalized juvenile polyposis/juvenile polyposis coli Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Dec 25, 2018

This variant is a gross deletion of the genomic region encompassing the promoter (non-coding exon 1) of the BMPR1A gene. The 5' end of this event is unknown as it extends beyond the assayed region for this gene, and therefore may encompass additional genes. The 3' boundary is likely confined to the region between non-coding exon 1 and non-coding exon 2. A large genomic deletion involving the promoter region (non-coding exon 1) has been reported to segregate with BMPR1A-related disease in a family (PMID: 20843829). A similar deletion involving the promoter region has also been reported in an individual with congenital heart defect who was pending for juvenile polyposis screening (PMID: 22067610). Experimental studies have shown that deletion of this promoter region impairs the transcription of a reporter gene in vitro, and protein samples derived from individuals carrying this variant showed reduced BMPR1A protein levels compared to a control sample (PMID: 20843829, 21872883). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1564673999; hg19: chr10-88516394;