6-43781058-C-A

Variant names:

• chr6-43781058-C-A
• rs3025018
• NM_003376.6:c.1034+255C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003376.6(VEGFA):​c.1034+255C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000574 in 697,118 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: 0.0000057 (0 hom.)
• Consequence: VEGFA NM_003376.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.48
• Publications: 6 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]

VEGFA Gene-Disease associations (from GenCC):

• congenital heart disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.44).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003376.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VEGFA	NM_003376.6	MANE Select	c.1034+255C>A		intron	N/A	NP_003367.4
	VEGFA	NM_001025366.3		c.1085+204C>A		intron	N/A	NP_001020537.2	P15692-14
	VEGFA	NM_001025367.3		c.1016+273C>A		intron	N/A	NP_001020538.2	P15692-16

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VEGFA	ENST00000672860.3	MANE Select	c.1034+255C>A		intron	N/A	ENSP00000500082.3	P15692-13
	VEGFA	ENST00000372055.9	TSL:1	c.1085+204C>A		intron	N/A	ENSP00000361125.5	P15692-14
	VEGFA	ENST00000425836.9	TSL:1	c.963-898C>A		intron	N/A	ENSP00000388465.4	A0A0A0MSH5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000574 AC: 4 AN: 697118 Hom.: 0 Cov.: 9 AF XY: 0.00000281 AC XY: 1 AN XY: 355834

African (AFR) AF: 0.00 AC: 0 AN: 17462

American (AMR) AF: 0.00 AC: 0 AN: 24196

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 16030

East Asian (EAS) AF: 0.000126 AC: 4 AN: 31642

South Asian (SAS) AF: 0.00 AC: 0 AN: 53442

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 29652

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2490

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 488080

Other (OTH) AF: 0.00 AC: 0 AN: 34124

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.44
CADD	Benign	13
DANN	Benign	0.73
PhyloP100		1.5
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.2

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: rs3025018; hg19: chr6-43748795;