chr6-43778673-C-A

Variant names:

• chr6-43778673-C-A
• rs3025047
• ENST00000476772.5:n.1592C>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000476772.5(VEGFA):​n.1592C>A variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000218 in 916,678 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: not found (cov: 33)
  • Exomes 𝑓: 0.0000022 (0 hom.)
• Consequence: VEGFA ENST00000476772.5 non_coding_transcript_exon
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.779
• Publications: 0 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: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000476772.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VEGFA	NM_003376.6	MANE Select	c.932+137C>A		intron	N/A	NP_003367.4
	VEGFA	NM_001025366.3		c.932+137C>A		intron	N/A	NP_001020537.2
	VEGFA	NM_001025367.3		c.932+137C>A		intron	N/A	NP_001020538.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VEGFA	ENST00000476772.5	TSL:1	n.1592C>A		non_coding_transcript_exon	Exon 4 of 4
	VEGFA	ENST00000672860.3	MANE Select	c.932+137C>A		intron	N/A	ENSP00000500082.3
	VEGFA	ENST00000372055.9	TSL:1	c.932+137C>A		intron	N/A	ENSP00000361125.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000218 AC: 2 AN: 916678 Hom.: 0 Cov.: 13 AF XY: 0.00000212 AC XY: 1 AN XY: 471906

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 22056

American (AMR) AF: 0.00 AC: 0 AN: 35464

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22140

East Asian (EAS) AF: 0.00 AC: 0 AN: 33822

South Asian (SAS) AF: 0.00 AC: 0 AN: 69892

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 47502

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4718

European-Non Finnish (NFE) AF: 0.00000313 AC: 2 AN: 638856

Other (OTH) AF: 0.00 AC: 0 AN: 42228

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	10
DANN	Benign	0.85
PhyloP100		0.78

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: rs3025047; hg19: chr6-43746410;