rs876657640

chrX-69957107-A-T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 8P and 1B. PM1 PM2 PM5 PP5_Moderate BP4

The NM_001399.5(EDA):c.477A>T(p.Arg159Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. R159T) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 22)
• Consequence: EDA NM_001399.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 3.67

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 7 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 5 benign, 2 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-69957106-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 458656.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP5: Variant X-69957107-A-T is Pathogenic according to our data. Variant chrX-69957107-A-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 228256.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.4065642).. Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EDA	NM_001399.5	c.477A>T	p.Arg159Ser	missense_variant	2/8	ENST00000374552.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EDA	ENST00000374552.9	c.477A>T	p.Arg159Ser	missense_variant	2/8	1	NM_001399.5	P4

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 22

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

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jul 22, 2015

The p.Arg159Ser variant in EDA has not been previously reported in individuals w ith X-linked hypohidrotic ectodermal dysplasia (XLHED) and was absent from large population studies. This variant affects a critical residue within the furin do main, and changes at this position have been shown to inhibit cleavage at this d omain, thereby impacting the normal function of the protein (Chen 2001). In summ ary, although additional studies are required to fully establish its clinical si gnificance, the p.Arg159Ser variant is likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
Cadd	Uncertain	24
Dann	Uncertain	0.99
FATHMM_MKL	Benign	0.71	D
LIST_S2	Uncertain	0.90	D;D;D;D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.41	T;T;T;T;T
MetaSVM	Uncertain	0.34	D
MutationAssessor	Benign	0.14	N;N;N;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-0.39	N;N;N;N;.
REVEL	Uncertain	0.38
Sift	Benign	0.036	D;.;.;D;.
Sift4G	Benign	0.63	T;T;T;T;T
Polyphen		0.98	D;D;D;.;.
Vest4		0.60
MutPred		0.48		Gain of phosphorylation at R159 (P = 0.0041);Gain of phosphorylation at R159 (P = 0.0041);Gain of phosphorylation at R159 (P = 0.0041);.;.;
MVP		0.99
MPC		0.92
ClinPred		0.77	D
GERP RS		3.8
Varity_R		0.71
gMVP		0.95

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs876657640; hg19: chrX-69176957;