6-43772252-C-T

Variant names:

• chr6-43772252-C-T
• rs833067
• NM_003376.6:c.606+940C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_003376.6(VEGFA):​c.606+940C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.583 in 152,070 control chromosomes in the GnomAD database, including 26,600 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.58 (26600 hom., cov: 33)
• Consequence: VEGFA NM_003376.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0230
• Publications: 3 publications found

Genes affected

VEGFA (HGNC:12680): (vascular endothelial growth factor A) This gene is a member of the PDGF/VEGF growth factor family. It encodes a heparin-binding protein, which exists as a disulfide-linked homodimer. This growth factor induces proliferation and migration of vascular endothelial cells, and is essential for both physiological and pathological angiogenesis. Disruption of this gene in mice resulted in abnormal embryonic blood vessel formation. This gene is upregulated in many known tumors and its expression is correlated with tumor stage and progression. Elevated levels of this protein are found in patients with POEMS syndrome, also known as Crow-Fukase syndrome. Allelic variants of this gene have been associated with microvascular complications of diabetes 1 (MVCD1) and atherosclerosis. Alternatively spliced transcript variants encoding different isoforms have been described. There is also evidence for alternative translation initiation from upstream non-AUG (CUG) codons resulting in additional isoforms. A recent study showed that a C-terminally extended isoform is produced by use of an alternative in-frame translation termination codon via a stop codon readthrough mechanism, and that this isoform is antiangiogenic. Expression of some isoforms derived from the AUG start codon is regulated by a small upstream open reading frame, which is located within an internal ribosome entry site. The levels of VEGF are increased during infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), thus promoting inflammation by facilitating recruitment of inflammatory cells, and by increasing the level of angiopoietin II (Ang II), one of two products of the SARS-CoV-2 binding target, angiotensin-converting enzyme 2 (ACE2). In turn, Ang II facilitates the elevation of VEGF, thus forming a vicious cycle in the release of inflammatory cytokines. [provided by RefSeq, Jun 2020]

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.73 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VEGFA	NM_003376.6	c.606+940C>T		intron_variant	Intron 1 of 7	ENST00000672860.3	NP_003367.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VEGFA	ENST00000672860.3	c.606+940C>T		intron_variant	Intron 1 of 7		NM_003376.6	ENSP00000500082.3

Frequencies

GnomAD3 genomes AF: 0.583 AC: 88604 AN: 151952 Hom.: 26569 Cov.: 33

Gnomad AFR AF: 0.736

Gnomad AMI AF: 0.279

Gnomad AMR AF: 0.607

Gnomad ASJ AF: 0.552

Gnomad EAS AF: 0.724

Gnomad SAS AF: 0.554

Gnomad FIN AF: 0.447

Gnomad MID AF: 0.547

Gnomad NFE AF: 0.502

Gnomad OTH AF: 0.610

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.583 AC: 88694 AN: 152070 Hom.: 26600 Cov.: 33 AF XY: 0.582 AC XY: 43292 AN XY: 74354

African (AFR) AF: 0.737 AC: 30544 AN: 41464

American (AMR) AF: 0.607 AC: 9277 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.552 AC: 1912 AN: 3466

East Asian (EAS) AF: 0.724 AC: 3740 AN: 5164

South Asian (SAS) AF: 0.552 AC: 2662 AN: 4826

European-Finnish (FIN) AF: 0.447 AC: 4727 AN: 10582

Middle Eastern (MID) AF: 0.565 AC: 166 AN: 294

European-Non Finnish (NFE) AF: 0.502 AC: 34120 AN: 67958

Other (OTH) AF: 0.611 AC: 1292 AN: 2114

Alfa AF: 0.534 Hom.: 4602

Bravo AF: 0.605

Asia WGS AF: 0.609 AC: 2115 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	6.7
DANN	Benign	0.68
PhyloP100		0.023
PromoterAI		0.054	Neutral
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs833067; hg19: chr6-43739989;