Is EDA c.526+20A>C pathogenic?

EDA c.526+20A>C is classified Benign in EDA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-15). Ultra-rare (popmax 0.0671%, afr); Associated with X-linked hypohidrotic ectodermal dysplasia.

What condition is associated with EDA c.526+20A>C?

EDA c.526+20A>C is associated with X-linked hypohidrotic ectodermal dysplasia (ClinVar).

How common is EDA c.526+20A>C in the general population?

EDA c.526+20A>C is ultra-rare (popmax 0.0671%, afr) (gnomAD).

How is Hypohidrotic ectodermal dysplasia inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

EDA c.526+20A>C

rs367574882 · VCV2747311

Benign Single submitter

Classification

Benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0671%, afr)

Conditions

X-linked hypohidrotic ectodermal dysplasia

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
Splice region	donor +20	near-intronic (+20 nt from the splice site)
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.7	GERP 1.5, phastCons 0.24
Non-coding constraint	—	not assessed · autosomes only, so chrX has no window · absence ≠ unconstrained
Overall
CADD	6.573	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0671% African / African-American · 37/55,116 alleles

Filtering AF 0.05% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0441%

Overall 0.00401% 44/1,098,190 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0671%	1,490
Remaining individualsnot grpmax-eligible	0.00919%	10,880
Admixed American	0.00458%	21,852
European (non-Finnish)	0.000125%	800,794

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: EDA
Coding: c.526+20A>C
MANE Select: NM_001399
dbSNP: rs367574882
Type: single nucleotide variant
Location: chrX:70023261 (GRCh38)
Structure: AlphaFold pLDDT 70.59 · 3 PDB

Full EDA gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

X-linked hypohidrotic ectodermal dysplasia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hypohidrotic ectodermal dysplasia (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked recessive
Onset: Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

EDA c.526+5G>T Likely pathogenic ★★ same condition
EDA c.527-2A>G Pathogenic/Likely pathogenic ★★ same condition
EDA c.706+1G>A Pathogenic/Likely pathogenic ★★ same condition
EDA c.707-13T>G Pathogenic ★★ same condition
EDA c.742-2A>G Pathogenic/Likely pathogenic ★★ same condition
EDA c.924+1G>T Likely pathogenic ★★ same condition
EDA p.Ala349Ser Likely pathogenic ★★ same condition
EDA p.Ala349Thr Pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/eda-c-526-plus-20a-c (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown