3-10149877-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_000551.4(VHL):c.554A>T(p.Tyr185Phe) 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 Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y185C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VHL NM_000551.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.55

Genes affected

VHL (HGNC:12687): (von Hippel-Lindau tumor suppressor) This gene encodes a component of a ubiquitination complex. The encoded protein is involved in the ubiquitination and degradation of hypoxia-inducible-factor (HIF), which is a transcription factor that plays a central role in the regulation of gene expression by oxygen. In addition to oxygen-related gene expression, this protein plays a role in many other cellular processes including cilia formation, cytokine signaling, regulation of senescence, and formation of the extracellular matrix. Variants of this gene are associated with von Hippel-Lindau syndrome, pheochromocytoma, erythrocytosis, renal cell carcinoma, and cerebellar hemangioblastoma. [provided by RefSeq, Jun 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 15 uncertain in NM_000551.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.821

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VHL	NM_000551.4	c.554A>T	p.Tyr185Phe	missense_variant	3/3	ENST00000256474.3
VHL	NM_198156.3	c.431A>T	p.Tyr144Phe	missense_variant	2/2
VHL	NM_001354723.2	c.*108A>T		3_prime_UTR_variant	3/3
VHL	NR_176335.1	n.883A>T		non_coding_transcript_exon_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VHL	ENST00000256474.3	c.554A>T	p.Tyr185Phe	missense_variant	3/3	1	NM_000551.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Von Hippel-Lindau syndrome;C1837915:Chuvash polycythemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Mar 28, 2022

This sequence change replaces tyrosine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 185 of the VHL protein (p.Tyr185Phe). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with VHL-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt VHL protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
Cadd	Benign	22
Dann	Uncertain	0.98
DEOGEN2	Pathogenic	0.90	D;.
Eigen	Benign	0.15
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Uncertain	0.91	D;D
M_CAP	Pathogenic	0.62	D
MetaRNN	Pathogenic	0.82	D;D
MetaSVM	Pathogenic	1.2	D
MutationAssessor	Benign	1.9	M;.
MutationTaster	Benign	0.60	D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-2.4	N;N
REVEL	Pathogenic	0.68
Sift4G	Uncertain	0.040	D;D
Polyphen		0.98	D;P
Vest4		0.38
MutPred		0.69		Gain of glycosylation at Y185 (P = 0.0103);.;
MVP		1.0
MPC		1.0
ClinPred		0.89	D
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.89
gMVP		0.61

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-10191561; COSMIC: COSV56542976;