rs727503008

Variant names:

• chrX-70033412-GT-G
• rs727503008
• NM_001399.5:c.809delT

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001399.5(EDA):​c.809delT​(p.Val270GlyfsTer10) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. V270V) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 24)
• Consequence: EDA NM_001399.5 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.48
• Publications: 2 publications found

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]

EDA Gene-Disease associations (from GenCC):

• tooth agenesis, selective, X-linked, 1

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• X-linked hypohidrotic ectodermal dysplasia

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• tooth agenesis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 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 X-70033412-GT-G is Pathogenic according to our data. Variant chrX-70033412-GT-G is described in ClinVar as Pathogenic. ClinVar VariationId is 163320.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.809delT	p.Val270GlyfsTer10	frameshift_variant	Exon 7 of 8	ENST00000374552.9	NP_001390.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EDA	ENST00000374552.9	c.809delT	p.Val270GlyfsTer10	frameshift_variant	Exon 7 of 8	1	NM_001399.5	ENSP00000363680.4

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 24

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hypohidrotic X-linked ectodermal dysplasia Pathogenic:1

Sep 20, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The Val270fs variant in EDA has not been reported in the literature nor previous ly identified by our laboratory. This frameshift variant is predicted to alter the protein?s amino acid sequence beginning at position 270 and lead to a premat ure termination codon 10 amino acids downstream. This alteration is then predict ed to lead to a truncated or absent protein. Heterozygous loss of function of fu nction of the EDA gene is an established disease mechanism in XLHED. In summary, this variant meets our criteria to be classified as pathogenic (http://pcpgm.pa rtners.org/LMM). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.5
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs727503008; hg19: chrX-69253262;