Is PLEC p.Ala226= (c.678G>A) pathogenic?

PLEC p.Ala226= (c.678G>A) is classified Conflicting classifications of pathogenicity in PLEC (ClinVar, Conflicting submitters, 5 submitters; last evaluated 2024-10-04). Very rare (popmax 0.00446%, eas); Associated with epidermolysis bullosa simplex 5B, with muscular dystrophy.

What condition is associated with PLEC p.Ala226= (c.678G>A)?

PLEC p.Ala226= (c.678G>A) is associated with epidermolysis bullosa simplex 5B, with muscular dystrophy, epidermolysis bullosa simplex 5A, Ogna type, epidermolysis bullosa simplex 5C, with pyloric atresia (ClinVar).

How common is PLEC p.Ala226= (c.678G>A) in the general population?

PLEC p.Ala226= (c.678G>A) is very rare (popmax 0.00446%, eas) (gnomAD).

PLEC p.Ala226=

Q: How is Epidermolysis bullosa simplex with muscular dystrophy inherited?

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

c.678G>A · rs782369854 · VCV501442

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00446%, eas)

Conditions

epidermolysis bullosa simplex 5B, with muscular dystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -12
Overall
CADD	1.063	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00446% East Asian · 2/44,886 alleles

Filtering AF 0.00111% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0009%

Overall 0.00174% 28/1,612,334 alleles · very rare exomes 25/1,460,186 · genomes 3/152,148 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00446%	22,443
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,602
South Asian	0.00329%	30,360
European (non-Finnish)	0.00169%	58,998
Remaining individualsnot grpmax-eligible	0.0016%	62,458
African / African-American	0.00134%	74,900

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: PLEC
Protein: p.Ala226=
Coding: c.678G>A
MANE Select: NM_201384
dbSNP: rs782369854
Type: single nucleotide variant
Location: chr8:143935238 (GRCh38)
Gene constraint: LOEUF 0.726 · pLI <0.01 (gnomAD)
Residue 226: the calponin-homology (ch) 1 domain; the 'globular 1' region; the 'actin-binding' region

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

Disease context

epidermolysis bullosa simplex 5B, with muscular dystrophy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: epidermolysis bullosa simplex 5A, Ogna type epidermolysis bullosa simplex 5C, with pyloric atresia autosomal recessive limb-girdle muscular dystrophy type 2Q epidermolysis bullosa simplex with nail dystrophy

For Epidermolysis bullosa simplex with muscular dystrophy (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

PLEC p.Arg1490Ter Pathogenic/Likely pathogenic ★★ same condition
PLEC p.Arg1973Trp Pathogenic ★★ ⚠ same condition
PLEC p.Arg2027Ter Pathogenic ★★ same condition
PLEC p.Arg2292Ter Pathogenic ★★ same condition
PLEC p.Arg2324Ter Pathogenic ★★ same condition
PLEC p.Arg2394Ter Pathogenic ★★ same condition
PLEC p.Arg559Ter Pathogenic ★★ same condition
PLEC p.Gln1591Ter Pathogenic/Likely 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/plec-p-ala226 (accessed [today's date]).

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