chr7-74040079-T-G

Variant names:

• chr7-74040079-T-G
• rs3801459
• NM_000501.4:c.197-1137T>G

Variant summary

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

The NM_000501.4(ELN):​c.197-1137T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.114 in 152,138 control chromosomes in the GnomAD database, including 1,364 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 0.11 (1364 hom., cov: 33)
• Consequence: ELN NM_000501.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.521
• Publications: 6 publications found

Genes affected

ELN (HGNC:3327): (elastin) This gene encodes a protein that is one of the two components of elastic fibers. Elastic fibers comprise part of the extracellular matrix and confer elasticity to organs and tissues including the heart, skin, lungs, ligaments, and blood vessels. The encoded protein is rich in hydrophobic amino acids such as glycine and proline, which form mobile hydrophobic regions bounded by crosslinks between lysine residues. Degradation products of the encoded protein, known as elastin-derived peptides or elastokines, bind the elastin receptor complex and other receptors and stimulate migration and proliferation of monocytes and skin fibroblasts. Elastokines can also contribute to cancer progression. Deletions and mutations in this gene are associated with supravalvular aortic stenosis (SVAS) and autosomal dominant cutis laxa. [provided by RefSeq, Aug 2017]

ELN Gene-Disease associations (from GenCC):

• cutis laxa, autosomal dominant 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics, Genomics England PanelApp, G2P
• supravalvular aortic stenosis

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• autosomal dominant cutis laxa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.207 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ELN	NM_000501.4	c.197-1137T>G		intron_variant	Intron 4 of 32	ENST00000252034.12	NP_000492.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ELN	ENST00000252034.12	c.197-1137T>G		intron_variant	Intron 4 of 32	1	NM_000501.4	ENSP00000252034.7

Frequencies

GnomAD3 genomes AF: 0.114 AC: 17280 AN: 152020 Hom.: 1358 Cov.: 33

Gnomad AFR AF: 0.211

Gnomad AMI AF: 0.0515

Gnomad AMR AF: 0.109

Gnomad ASJ AF: 0.0274

Gnomad EAS AF: 0.211

Gnomad SAS AF: 0.124

Gnomad FIN AF: 0.0968

Gnomad MID AF: 0.0886

Gnomad NFE AF: 0.0563

Gnomad OTH AF: 0.0946

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

GnomAD4 genome AF: 0.114 AC: 17299 AN: 152138 Hom.: 1364 Cov.: 33 AF XY: 0.116 AC XY: 8653 AN XY: 74380

African (AFR) AF: 0.211 AC: 8734 AN: 41490

American (AMR) AF: 0.109 AC: 1662 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.0274 AC: 95 AN: 3470

East Asian (EAS) AF: 0.211 AC: 1088 AN: 5146

South Asian (SAS) AF: 0.123 AC: 593 AN: 4826

European-Finnish (FIN) AF: 0.0968 AC: 1026 AN: 10604

Middle Eastern (MID) AF: 0.0884 AC: 26 AN: 294

European-Non Finnish (NFE) AF: 0.0563 AC: 3828 AN: 67992

Other (OTH) AF: 0.0946 AC: 200 AN: 2114

Alfa AF: 0.0398 Hom.: 54

Bravo AF: 0.120

Asia WGS AF: 0.175 AC: 606 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	4.6
DANN	Benign	0.76
PhyloP100		0.52
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: rs3801459; hg19: chr7-73454409; COSMIC: COSV52711380; COSMIC: COSV52711380;