chrX-70035502-C-T

Variant names:

• chrX-70035502-C-T
• rs886039347
• NM_001399.5:c.1069C>T

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM1 PM2 PP2 PP3 PP5_Very_Strong

The NM_001399.5(EDA):​c.1069C>T​(p.Arg357Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000182 in 1,098,191 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R357G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 21)
  • Exomes 𝑓: 0.0000018 (0 hom. 1 hem.)
• Consequence: EDA NM_001399.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 1.47
• Publications: 3 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 14 ACMG points.

• PM1: In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_001399.5
• PM2: Very rare variant in population databases, with high coverage
• 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, 0.824
• PP5: Variant X-70035502-C-T is Pathogenic according to our data. Variant chrX-70035502-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 265112.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.1069C>T	p.Arg357Trp	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.1069C>T	p.Arg357Trp	missense_variant	Exon 8 of 8	1	NM_001399.5	ENSP00000363680.4
EDA	ENST00000374553.6	c.1063C>T	p.Arg355Trp	missense_variant	Exon 8 of 8	1		ENSP00000363681.2
EDA	ENST00000524573.5	c.1054C>T	p.Arg352Trp	missense_variant	Exon 8 of 8	1		ENSP00000432585.1
EDA	ENST00000616899.1	c.673C>T	p.Arg225Trp	missense_variant	Exon 7 of 7	5		ENSP00000481963.1

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome AF: 0.00000182 AC: 2 AN: 1098191 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 1 AN XY: 363545

African (AFR) AF: 0.0000379 AC: 1 AN: 26403

American (AMR) AF: 0.00 AC: 0 AN: 35206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19386

East Asian (EAS) AF: 0.00 AC: 0 AN: 30201

South Asian (SAS) AF: 0.00 AC: 0 AN: 54145

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40503

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4134

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 842119

Other (OTH) AF: 0.00 AC: 0 AN: 46094

GnomAD4 genome Cov.: 21

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:3

Apr 22, 2021

AiLife Diagnostics, AiLife Diagnostics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 23, 2022

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: 23991204, 28045201) -

Jun 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

EDA: PM1, PM2, PM5, PS4:Moderate, PP3, PP4 -

Hypohidrotic X-linked ectodermal dysplasia Pathogenic:1

Dec 15, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 357 of the EDA protein (p.Arg357Trp). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of X-linked hypohidrotic ectodermal dysplasia (PMID: 28045201, 31796081; Invitae). ClinVar contains an entry for this variant (Variation ID: 265112). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt EDA protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -

See cases Pathogenic:1

Jul 17, 2019

Institute of Human Genetics, University Hospital Muenster

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ACMG categories: PM1,PM2,PP1,PP3 -

EDA-related disorder Pathogenic:1

May 30, 2024

PreventionGenetics, part of Exact Sciences

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The EDA c.1069C>T variant is predicted to result in the amino acid substitution p.Arg357Trp. This variant has been reported in the hemizygous state in individuals with hypohidrotic ectodermal dysplasia (Arte et al. 2013. PubMed ID: 23991204; Monroy-Jaramillo et al. 2017. PubMed ID: 28045201; Martínez-Romero et al 2019. PubMed ID: 31796081). This variant has not been reported in a large population database, indicating this variant is rare and has been interpreted as pathogenic and likely pathogenic by other laboratories in the ClinVar database (https://www.ncbi.nlm.nih.gov/clinvar/variation/265112/). Additionally, a different missense change impacting the same amino acid (c.1070G>C, p.Arg357Pro) has been reported in individuals with hypohidrotic ectodermal dysplasia (Monreal et al. 1998. PubMed ID: 9683615; Goodwin et al. 2014. PubMed ID: 25333067), indicating the p.Arg357 residue may be important for EDA function. Taken together, the c.1069C>T (p.Arg357Trp) variant is interpreted as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.52
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.060
CADD	Pathogenic	26
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.82	.;D;.;.
FATHMM_MKL	Benign	0.75	D
LIST_S2	Pathogenic	0.99	D;D;D;D
M_CAP	Pathogenic	0.72	D
MetaRNN	Pathogenic	0.82	D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Benign	0.69	.;N;.;.
PhyloP100		1.5
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-1.7	N;N;N;.
REVEL	Pathogenic	0.75
Sift	Uncertain	0.0030	D;.;.;.
Sift4G	Uncertain	0.022	D;D;D;D
Polyphen		1.0	D;D;D;.
Vest4		0.65
MutPred		0.58		.;Loss of solvent accessibility (P = 0.0087);.;.;
MVP		0.96
MPC		1.8
ClinPred		0.91	D
GERP RS		3.6
Varity_R		0.95
gMVP		0.89
Mutation Taster		=24/76	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs886039347; hg19: chrX-69255352;