X-70035393-T-G

Variant names:

• chrX-70035393-T-G
• rs876657687
• NM_001399.5:c.960T>G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_001399.5(EDA):​c.960T>G​(p.Tyr320*) variant causes a stop gained 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. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 21)
• Consequence: EDA NM_001399.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.527

Genes affected

EDA (HGNC:3157): (ectodysplasin A) The protein encoded by this gene is a type II membrane protein that can be cleaved by furin to produce a secreted form. The encoded protein, which belongs to the tumor necrosis factor family, acts as a homotrimer and may be involved in cell-cell signaling during the development of ectodermal organs. Defects in this gene are a cause of ectodermal dysplasia, anhidrotic, which is also known as X-linked hypohidrotic ectodermal dysplasia. Several transcript variants encoding many different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 15 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-70035393-T-G is Pathogenic according to our data. Variant chrX-70035393-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 228339.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EDA	NM_001399.5	c.960T>G	p.Tyr320*	stop_gained	Exon 8 of 8	ENST00000374552.9	NP_001390.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EDA	ENST00000374552.9	c.960T>G	p.Tyr320*	stop_gained	Exon 8 of 8	1	NM_001399.5	ENSP00000363680.4
EDA	ENST00000374553.6	c.954T>G	p.Tyr318*	stop_gained	Exon 8 of 8	1		ENSP00000363681.2
EDA	ENST00000524573.5	c.945T>G	p.Tyr315*	stop_gained	Exon 8 of 8	1		ENSP00000432585.1
EDA	ENST00000616899.1	c.564T>G	p.Tyr188*	stop_gained	Exon 7 of 7	5		ENSP00000481963.1

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 21

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hypohidrotic X-linked ectodermal dysplasia Pathogenic:1

Jun 10, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Tyr320X variant in EDA has not been previously reported in individuals wit h hypohidrotic ectodermal dysplasia (HED) and was absent from large population s tudies. This nonsense variant leads to a premature termination codon at position 320, which is predicted to lead to a truncated or absent protein. Heterozygous loss of function of the EDA gene is an established disease mechanism in X-linked HED. In summary, this variant meets our criteria to be classified as pathogeni c for HED in an X-linked manner (http://www.partners.org/personalizedmedicine/LM M) based upon absence from controls and predicted impact to the protein. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.53
CADD	Pathogenic	35
DANN	Uncertain	0.99
FATHMM_MKL	Benign	0.65	D
Vest4		0.79
GERP RS		-2.5

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs876657687; hg19: chrX-69255243;