rs483352804

Variant names:

• chrX-70035389-G-A
• rs483352804
• NM_001399.5:c.956G>A

Your query was ambiguous. Multiple possible variants found:

• chrX-70035389-G-A
• chrX-70035389-G-T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PP2 PP3_Moderate

The NM_001399.5(EDA):​c.956G>A​(p.Ser319Asn) variant causes a missense change involving the alteration of a 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 Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S319I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 21)
• Consequence: EDA NM_001399.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 9.22
• 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: Likely_pathogenic. The variant received 7 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, 5 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, 0.848

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EDA	NM_001399.5	c.956G>A	p.Ser319Asn	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.956G>A	p.Ser319Asn	missense_variant	Exon 8 of 8	1	NM_001399.5	ENSP00000363680.4
EDA	ENST00000374553.6	c.950G>A	p.Ser317Asn	missense_variant	Exon 8 of 8	1		ENSP00000363681.2
EDA	ENST00000524573.5	c.941G>A	p.Ser314Asn	missense_variant	Exon 8 of 8	1		ENSP00000432585.1
EDA	ENST00000616899.1	c.560G>A	p.Ser187Asn	missense_variant	Exon 7 of 7	5		ENSP00000481963.1

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 21

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Tooth agenesis, selective, X-linked, 1 Pathogenic:1

Aug 21, 2018

Molecular Genetics Laboratory, BC Children's and BC Women's Hospitals

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Hypohidrotic X-linked ectodermal dysplasia Uncertain:1

May 01, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces serine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 319 of the EDA protein (p.Ser319Asn). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of EDA-related conditions (PMID: 35599849). ClinVar contains an entry for this variant (Variation ID: 625527). 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%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.75	.;D;.;.
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.96	D;D;D;D
M_CAP	Pathogenic	0.95	D
MetaRNN	Pathogenic	0.85	D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	1.9	.;L;.;.
PhyloP100		9.2
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-0.95	N;N;N;.
REVEL	Pathogenic	0.72
Sift	Pathogenic	0.0	D;.;.;.
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.99	D;D;D;.
Vest4		0.73
MutPred		0.53		.;Loss of sheet (P = 0.1501);.;.;
MVP		0.97
MPC		1.7
ClinPred		0.95	D
GERP RS		5.5
Varity_R		0.96
gMVP		0.98
Mutation Taster		=7/93	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs483352804; hg19: chrX-69255239;