X-70035478-G-A

Variant names:

• chrX-70035478-G-A
• rs132630317
• NM_001399.5:c.1045G>A

Variant summary

Our verdict is Pathogenic. The variant received 19 ACMG points: 19P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5_Very_Strong

The NM_001399.5(EDA):​c.1045G>A​(p.Ala349Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,098,180 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A349S) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 21)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: EDA NM_001399.5 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 9.25
• Publications: 19 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 19 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 4 uncertain in NM_001399.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-70035478-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1470331.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 110 curated pathogenic missense variants (we use a threshold of 10). The gene has 22 curated benign missense variants. Gene score misZ: 1.7843 (below the threshold of 3.09). Trascript score misZ: NaN (below the threshold of 3.09). GenCC associations: The gene is linked to tooth agenesis, selective, X-linked, 1, X-linked hypohidrotic ectodermal dysplasia, tooth agenesis.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.98
• PP5: Variant X-70035478-G-A is Pathogenic according to our data. Variant chrX-70035478-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 11040.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EDA	NM_001399.5	c.1045G>A	p.Ala349Thr	missense_variant	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.1045G>A	p.Ala349Thr	missense_variant	Exon 8 of 8	1	NM_001399.5	ENSP00000363680.4
EDA	ENST00000374553.6	c.1039G>A	p.Ala347Thr	missense_variant	Exon 8 of 8	1		ENSP00000363681.2
EDA	ENST00000524573.5	c.1030G>A	p.Ala344Thr	missense_variant	Exon 8 of 8	1		ENSP00000432585.1
EDA	ENST00000616899.1	c.649G>A	p.Ala217Thr	missense_variant	Exon 7 of 7	5		ENSP00000481963.1

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1098180 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 363536

African (AFR) AF: 0.00 AC: 0 AN: 26402

American (AMR) AF: 0.00 AC: 0 AN: 35204

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19384

East Asian (EAS) AF: 0.00 AC: 0 AN: 30205

South Asian (SAS) AF: 0.0000185 AC: 1 AN: 54138

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40502

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4135

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 842113

Other (OTH) AF: 0.00 AC: 0 AN: 46097

GnomAD4 genome Cov.: 21

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hypohidrotic X-linked ectodermal dysplasia Pathogenic:2

Aug 01, 1998

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Nov 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 349 of the EDA protein (p.Ala349Thr). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with ectodermal dysplasia (PMID: 9683615, 15461765). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 11040). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt EDA protein function with a negative predictive value of 80%. For these reasons, this variant has been classified as Pathogenic. -

not provided Pathogenic:1

Sep 01, 2023

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed in large population cohorts (gnomAD); Missense variants in this gene are often considered pathogenic (HGMD); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 11343303, 18666859, 21457804, 30192988, 15461765, 35131284, 22446708, 22566850, 30117778, 31129666, 24312213, 11295832, 9683615, 34863015, 26582918, 24077912) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.69	D
BayesDel_noAF	Pathogenic	0.75
CADD	Pathogenic	28
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.79	.;D;.;.
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	D;D;D;D
M_CAP	Pathogenic	0.77	D
MetaRNN	Pathogenic	0.98	D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.4	.;M;.;.
PhyloP100		9.2
PrimateAI	Pathogenic	0.88	D
PROVEAN	Benign	-1.6	N;N;N;.
REVEL	Pathogenic	0.89
Sift	Pathogenic	0.0	D;.;.;.
Sift4G	Uncertain	0.0050	D;D;D;D
Polyphen		1.0	D;D;D;.
Vest4		0.89
MutPred		0.89		.;Loss of sheet (P = 0.0817);.;.;
MVP		1.0
MPC		1.8
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.98
gMVP		0.98
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs132630317; hg19: chrX-69255328; COSMIC: COSV105927890; COSMIC: COSV105927890;