NM_000551.4:c.167C>T

Variant names:

• chr3-10142014-C-T
• rs752980085
• NM_000551.4:c.167C>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_000551.4(VHL):​c.167C>T​(p.Ala56Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000139 in 1,437,454 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. A56A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: VHL NM_000551.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 0.353

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 2 ACMG points.

• PM1: In a chain von Hippel-Lindau disease tumor suppressor (size 212) in uniprot entity VHL_HUMAN there are 96 pathogenic changes around while only 8 benign (92%) in NM_000551.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17696366).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VHL	NM_000551.4	c.167C>T	p.Ala56Val	missense_variant	Exon 1 of 3	ENST00000256474.3	NP_000542.1
VHL	NM_001354723.2	c.167C>T	p.Ala56Val	missense_variant	Exon 1 of 3		NP_001341652.1
VHL	NM_198156.3	c.167C>T	p.Ala56Val	missense_variant	Exon 1 of 2		NP_937799.1
VHL	NR_176335.1	n.237C>T		non_coding_transcript_exon_variant	Exon 1 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VHL	ENST00000256474.3	c.167C>T	p.Ala56Val	missense_variant	Exon 1 of 3	1	NM_000551.4	ENSP00000256474.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1437454 Hom.: 0 Cov.: 32 AF XY: 0.00000280 AC XY: 2 AN XY: 713182

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: 9.08e-7

Gnomad4 OTH exome AF: 0.0000168

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Von Hippel-Lindau syndrome Uncertain:1

Feb 22, 2024

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces alanine with valine at codon 56 of the VHL protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual with a non-metastatic Von Hippel-Lindau syndrome-associated pancreatic neuroendocrine tumor (PMID: 29748190). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

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

Oct 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 56 of the VHL protein (p.Ala56Val). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with VHL-related conditions (PMID: 29748190). ClinVar contains an entry for this variant (Variation ID: 188263). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on VHL protein function. RNA analysis performed to evaluate the impact of this missense change on mRNA splicing indicates it does not significantly alter splicing (internal data). 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. -

Von Hippel-Lindau syndrome;C0031511:Pheochromocytoma;C1837915:Chuvash polycythemia;CN074294:Nonpapillary renal cell carcinoma Uncertain:1

Mar 28, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome Uncertain:1

Mar 22, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.A56V variant (also known as c.167C>T), located in coding exon 1 of the VHL gene, results from a C to T substitution at nucleotide position 167. The alanine at codon 56 is replaced by valine, an amino acid with similar properties. This alteration was detected in a patient with von Hippel&ndash;Lindau (VHL) associated pancreatic neuroendocrine tumor (Krauss T et al. Endocr Relat Cancer, 2018 09;25:783-793). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.033	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	18
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.44	T;.
Eigen	Benign	-0.68
Eigen_PC	Benign	-0.66
FATHMM_MKL	Benign	0.37	N
LIST_S2	Benign	0.67	T;T
M_CAP	Pathogenic	0.54	D
MetaRNN	Benign	0.18	T;T
MetaSVM	Benign	-0.49	T
MutationAssessor	Benign	0.55	N;N
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-1.2	N;N
REVEL	Benign	0.095
Sift	Uncertain	0.026	.;D
Sift4G	Benign	0.19	T;T
Polyphen		0.0	B;B
Vest4		0.12
MutPred		0.23		Gain of sheet (P = 0.0166);Gain of sheet (P = 0.0166);
MVP		0.96
MPC		0.63
ClinPred		0.61	D
GERP RS		2.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.37
gMVP		0.82

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs752980085; hg19: chr3-10183698;