chr7-74061138-T-A

Variant names:

• chr7-74061138-T-A
• rs727503033
• NM_000501.4:c.1785T>A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000501.4(ELN):​c.1785T>A​(p.Tyr595*) variant causes a stop gained, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ELN NM_000501.4 stop_gained, splice_region
• Scores: Splicing: ADA: 0.00004723
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -1.24

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-AS1 (HGNC:40212): (ELN antisense RNA 1)

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-74061138-T-A is Pathogenic according to our data. Variant chr7-74061138-T-A is described in ClinVar as [Pathogenic]. Clinvar id is 163396.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ELN	NM_000501.4	c.1785T>A	p.Tyr595*	stop_gained, splice_region_variant	Exon 26 of 33	ENST00000252034.12	NP_000492.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ELN	ENST00000252034.12	c.1785T>A	p.Tyr595*	stop_gained, splice_region_variant	Exon 26 of 33	1	NM_000501.4	ENSP00000252034.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Supravalvar aortic stenosis Pathogenic:1

Jul 30, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Tyr595X variant in ELN has not been previously reported in individuals wit h SVAS and was absent from large population studies. This nonsense variant leads to a premature termination codon at position 595, which is predicted to lead to a truncated or absent protein. Heterozygous loss-of-function of the ELN gene is an established disease mechanism in SVAS (Human Gene Mutation Database, HGMD). In summary, the p.Tyr595X variant meets our criteria to be classified as pathoge nic for SVAS in an autosomal dominant manner (http://pcpgm.partners.org/lmm). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.41
CADD	Pathogenic	35
DANN	Uncertain	0.99
Eigen	Benign	-0.20
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.34	N
Vest4		0.85
GERP RS		-6.3

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000047
dbscSNV1_RF	Benign	0.32
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

Publications

LitVar

Other links and lift over

dbSNP: rs727503033; hg19: chr7-73475468;