rs132630308

Positions:

• chrX-69616489-T-A
• chrX-69616489-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Moderate PP5_Moderate

The NM_001399.5(EDA):​c.181T>A​(p.Tyr61Asn) variant causes a missense change involving the alteration of a non-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 Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 24)
• Consequence: EDA NM_001399.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 3.09

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 Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.927
• PP5: Variant X-69616489-T-A is Pathogenic according to our data. Variant chrX-69616489-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 656399.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EDA	NM_001399.5	c.181T>A	p.Tyr61Asn	missense_variant	1/8	ENST00000374552.9	NP_001390.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EDA	ENST00000374552.9	c.181T>A	p.Tyr61Asn	missense_variant	1/8	1	NM_001399.5	ENSP00000363680	P4

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 24

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hypohidrotic X-linked ectodermal dysplasia Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 03, 2020

Variants that disrupt the p.Tyr61 amino acid residue in EDA have been observed in affected individuals (PMID: 8696334). This suggests that it is a clinically significant residue, and that other variants that disrupt this residue are likely to be causative of disease. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This sequence change replaces tyrosine with asparagine at codon 61 of the EDA protein (p.Tyr61Asn). The tyrosine residue is moderately conserved and there is a large physicochemical difference between tyrosine and asparagine. This variant has been observed in an individual affected with ectodermal dysplasia (Invitae). This variant is not present in population databases (ExAC no frequency). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Uncertain	24
DANN	Benign	0.96
DEOGEN2	Uncertain	0.44	.;.;.;.;T;.
FATHMM_MKL	Benign	0.75	D
LIST_S2	Uncertain	0.96	D;D;D;D;D;D
M_CAP	Pathogenic	0.98	D
MetaRNN	Pathogenic	0.93	D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	0.97	L;L;L;L;L;L
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-9.0	D;D;D;N;N;N
REVEL	Pathogenic	0.83
Sift	Pathogenic	0.0	D;D;D;D;.;.
Sift4G	Pathogenic	0.0	D;D;D;T;T;T
Polyphen		1.0	D;D;D;D;D;D
Vest4		0.82
MutPred		0.71		Gain of disorder (P = 0.0124);Gain of disorder (P = 0.0124);Gain of disorder (P = 0.0124);Gain of disorder (P = 0.0124);Gain of disorder (P = 0.0124);Gain of disorder (P = 0.0124);
MVP		1.0
MPC		1.3
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.81
gMVP		0.91

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs132630308; hg19: chrX-68836333;