rs762105711

Variant names:

• chr12-6025622-AC-A
• rs762105711
• NM_000552.5:c.3179delG

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000552.5(VWF):​c.3179delG​(p.Cys1060LeufsTer59) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: VWF NM_000552.5 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.30

Genes affected

VWF (HGNC:12726): (von Willebrand factor) This gene encodes a glycoprotein involved in hemostasis. The encoded preproprotein is proteolytically processed following assembly into large multimeric complexes. These complexes function in the adhesion of platelets to sites of vascular injury and the transport of various proteins in the blood. Mutations in this gene result in von Willebrand disease, an inherited bleeding disorder. An unprocessed pseudogene has been found on chromosome 22. [provided by RefSeq, Oct 2015]

ACMG classification

Verdict is Pathogenic. Variant got 12 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 12-6025622-AC-A is Pathogenic according to our data. Variant chr12-6025622-AC-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 505760.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VWF	NM_000552.5	c.3179delG	p.Cys1060LeufsTer59	frameshift_variant	Exon 24 of 52	ENST00000261405.10	NP_000543.3
VWF	XM_047429501.1	c.3179delG	p.Cys1060LeufsTer59	frameshift_variant	Exon 24 of 52		XP_047285457.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VWF	ENST00000261405.10	c.3179delG	p.Cys1060LeufsTer59	frameshift_variant	Exon 24 of 52	1	NM_000552.5	ENSP00000261405.5
VWF	ENST00000538635.5	n.421-31689delG		intron_variant	Intron 5 of 5	4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 7.18e-7 AC: 1 AN: 1393394 Hom.: 0 Cov.: 25 AF XY: 0.00000144 AC XY: 1 AN XY: 695890

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.50e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary von Willebrand disease Pathogenic:1

Jun 15, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Cys1060LeufsX59 variant (NM_000552.3 c.3179delG) in VWF has not been repor ted in individuals with von Willebrand disease (VWD). Data from large population studies is insufficient to assess the frequency of this variant. This variant i s predicted to cause a frameshift, which alters the protein?s amino acid sequenc e beginning at position 1060 and leads to a premature termination codon 59 amino acids downstream. This alteration is then predicted to lead to a truncated or a bsent protein. Loss of function of the VWF gene is associated with von Willebran d disease. In summary, although additional studies are required to fully establ ish a null effect on the protein, the p.Cys1060LeufsX59 variant is likely pathog enic. -

Computational scores

Source: dbNSFP v4.3

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: rs762105711; hg19: chr12-6134788;