12-6034818-T-A

Position:

• chr12-6034818-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 5P and 2B. PM1 PM2 PP2 BP4_Moderate

The NM_000552.5(VWF):​c.2555A>T​(p.Gln852Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q852R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: VWF NM_000552.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.552

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 Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a region_of_interest CX (size 27) in uniprot entity VWF_HUMAN there are 4 pathogenic changes around while only 1 benign (80%) in NM_000552.5
• PM2: Very rare variant in population databases, with high coverage
• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.23445272).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
VWF	NM_000552.5	c.2555A>T	p.Gln852Leu	missense_variant	20/52	ENST00000261405.10	NP_000543.3
VWF	XM_047429501.1	c.2555A>T	p.Gln852Leu	missense_variant	20/52		XP_047285457.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
VWF	ENST00000261405.10	c.2555A>T	p.Gln852Leu	missense_variant	20/52	1	NM_000552.5	ENSP00000261405	P1
VWF	ENST00000538635.5	n.421-40884A>T		intron_variant, non_coding_transcript_variant		4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 69

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.095
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	12
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.72	D
Eigen	Benign	-0.73
Eigen_PC	Benign	-0.67
FATHMM_MKL	Benign	0.27	N
LIST_S2	Benign	0.13	T
M_CAP	Uncertain	0.094	D
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	1.5	L
MutationTaster	Benign	1.0	P
PrimateAI	Benign	0.25	T
PROVEAN	Uncertain	-3.5	D
REVEL	Benign	0.050
Sift	Uncertain	0.019	D
Sift4G	Uncertain	0.015	D
Polyphen		0.011	B
Vest4		0.19
MutPred		0.49		Gain of catalytic residue at K855 (P = 0);
MVP		0.64
MPC		0.18
ClinPred		0.75	D
GERP RS		0.42
Varity_R		0.18
gMVP		0.49

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: rs216321; hg19: chr12-6143984;