rs1556106742

Variant names:

• chrX-70033418-A-G
• rs1556106742
• NM_001399.5:c.814A>G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001399.5(EDA):​c.814A>G​(p.Asn272Asp) variant causes a missense change. 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 (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: EDA NM_001399.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.45

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 Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.873

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EDA	NM_001399.5	c.814A>G	p.Asn272Asp	missense_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.814A>G	p.Asn272Asp	missense_variant	Exon 7 of 8	1	NM_001399.5	ENSP00000363680.4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hypohidrotic X-linked ectodermal dysplasia Uncertain:1

Dec 25, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces asparagine, which is neutral and polar, with aspartic acid, which is acidic and polar, at codon 272 of the EDA protein (p.Asn272Asp). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features consistent with ectodermal dysplasia (Invitae). ClinVar contains an entry for this variant (Variation ID: 458661). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on EDA protein function. 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	0.70
BayesDel_addAF	Uncertain	0.081	D
BayesDel_noAF	Benign	-0.12
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.36	.;T;.;.
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.95	D;D;D;D
M_CAP	Pathogenic	0.87	D
MetaRNN	Pathogenic	0.87	D;D;D;D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Benign	0.0	N;N;.;.
PrimateAI	Pathogenic	0.79	T
PROVEAN	Benign	-1.4	N;N;N;.
REVEL	Uncertain	0.55
Sift	Uncertain	0.012	D;.;.;.
Sift4G	Uncertain	0.042	D;T;T;T
Polyphen		0.59	P;P;P;.
Vest4		0.52
MutPred		0.77		Loss of MoRF binding (P = 0.044);Loss of MoRF binding (P = 0.044);.;.;
MVP		0.99
MPC		1.9
ClinPred		0.86	D
GERP RS		5.5
Varity_R		0.87
gMVP		0.89

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1556106742; hg19: chrX-69253268;