12-6019474-C-A

Position:

• chr12-6019474-C-A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5

The NM_000552.5(VWF):​c.3944G>T​(p.Arg1315Leu) 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. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1315H) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VWF NM_000552.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1 O:1
• Conservation: PhyloP100: 6.99

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.

• PM1: In a hotspot region, there are 9 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 9 uncertain in NM_000552.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-6019475-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 100310.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), VWF. . Gene score misZ 0.98969 (greater than the threshold 3.09). Trascript score misZ 3.5064 (greater than threshold 3.09). GenCC has associacion of gene with von Willebrand disease type 2M, hereditary von Willebrand disease, von Willebrand disease type 2B, von Willebrand disease type 2N, von Willebrand disease 2, von Willebrand disease type 2A, von Willebrand disease 3, von Willebrand disease 1.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.979
• PP5: Variant 12-6019474-C-A is Pathogenic according to our data. Variant chr12-6019474-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 100312.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr12-6019474-C-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VWF	NM_000552.5	c.3944G>T	p.Arg1315Leu	missense_variant	28/52	ENST00000261405.10
VWF	XM_047429501.1	c.3944G>T	p.Arg1315Leu	missense_variant	28/52

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VWF	ENST00000261405.10	c.3944G>T	p.Arg1315Leu	missense_variant	28/52	1	NM_000552.5	P1
VWF	ENST00000538635.5	n.421-25540G>T		intron_variant, non_coding_transcript_variant		4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1 Other:1

Revision: no assertion criteria provided

Submissions by phenotype

von Willebrand disease type 2 Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca Granda Ospedale Maggiore Policlinico

Apr 26, 2022

- -

not provided Other:1

not provided, no classification provided

literature only

Academic Unit of Haematology, University of Sheffield

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.77
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.42
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.77	D
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.65	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.8	H
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.55	T
PROVEAN	Uncertain	-3.0	D
REVEL	Pathogenic	0.85
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.84		Gain of catalytic residue at E1320 (P = 2e-04);
MVP		0.92
MPC		1.0
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.74
gMVP		0.93

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: rs61749396; hg19: chr12-6128640;